Merge drm/drm-next into drm-misc-next

Kickstart new drm-misc-next cycle.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>

128 files changed, 3855 insertions, 1396 deletions

diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 26475b409b53..578a439e71b5 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -11,7 +11,7 @@ config USB_OHCI_BIG_ENDIAN_MMIO
 
 config USB_OHCI_LITTLE_ENDIAN
 	bool
-	default n if STB03xxx || PPC_MPC52xx
+	default n if PPC_MPC52xx
 	default y
 
 config USB_EHCI_BIG_ENDIAN_MMIO
diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
index 3e2cc95b7b0b..643edf5fe18c 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -31,7 +31,6 @@ obj-$(CONFIG_USB_SL811_HCD)	+= host/
 obj-$(CONFIG_USB_ISP1362_HCD)	+= host/
 obj-$(CONFIG_USB_U132_HCD)	+= host/
 obj-$(CONFIG_USB_R8A66597_HCD)	+= host/
-obj-$(CONFIG_USB_HWA_HCD)	+= host/
 obj-$(CONFIG_USB_FSL_USB2)	+= host/
 obj-$(CONFIG_USB_FOTG210_HCD)	+= host/
 obj-$(CONFIG_USB_MAX3421_HCD)	+= host/
diff --git a/drivers/usb/cdns3/cdns3-ep0.c b/drivers/usb/cdns3/cdns3-ep0.c
index 02ec7ab4bb48..e29989d57bef 100644
--- a/drivers/usb/cdns3/cdns3-ep0.c
+++ b/drivers/usb/cdns3/cdns3-ep0.c
@@ -731,6 +731,7 @@ static int cdns3_gadget_ep0_queue(struct usb_ep *ep,
 		request->actual = 0;
 		priv_dev->status_completion_no_call = true;
 		priv_dev->pending_status_request = request;
+		usb_gadget_set_state(&priv_dev->gadget, USB_STATE_CONFIGURED);
 		spin_unlock_irqrestore(&priv_dev->lock, flags);
 
 		/*
diff --git a/drivers/usb/cdns3/cdnsp-gadget.c b/drivers/usb/cdns3/cdnsp-gadget.c
index c23f53e9b1ef..27df0c697897 100644
--- a/drivers/usb/cdns3/cdnsp-gadget.c
+++ b/drivers/usb/cdns3/cdnsp-gadget.c
@@ -1882,7 +1882,7 @@ static int __cdnsp_gadget_init(struct cdns *cdns)
 	pdev->gadget.name = "cdnsp-gadget";
 	pdev->gadget.speed = USB_SPEED_UNKNOWN;
 	pdev->gadget.sg_supported = 1;
-	pdev->gadget.max_speed = USB_SPEED_SUPER_PLUS;
+	pdev->gadget.max_speed = max_speed;
 	pdev->gadget.lpm_capable = 1;
 
 	pdev->setup_buf = kzalloc(CDNSP_EP0_SETUP_SIZE, GFP_KERNEL);
diff --git a/drivers/usb/cdns3/cdnsp-gadget.h b/drivers/usb/cdns3/cdnsp-gadget.h
index 783ca8ffde00..f740fa6089d8 100644
--- a/drivers/usb/cdns3/cdnsp-gadget.h
+++ b/drivers/usb/cdns3/cdnsp-gadget.h
@@ -383,8 +383,8 @@ struct cdnsp_intr_reg {
 #define IMAN_IE			BIT(1)
 #define IMAN_IP			BIT(0)
 /* bits 2:31 need to be preserved */
-#define IMAN_IE_SET(p)		(((p) & IMAN_IE) | 0x2)
-#define IMAN_IE_CLEAR(p)	(((p) & IMAN_IE) & ~(0x2))
+#define IMAN_IE_SET(p)		((p) | IMAN_IE)
+#define IMAN_IE_CLEAR(p)	((p) & ~IMAN_IE)
 
 /* IMOD - Interrupter Moderation Register - irq_control bitmasks. */
 /*
diff --git a/drivers/usb/cdns3/cdnsp-mem.c b/drivers/usb/cdns3/cdnsp-mem.c
index a47948a1623f..ad9aee3f1e39 100644
--- a/drivers/usb/cdns3/cdnsp-mem.c
+++ b/drivers/usb/cdns3/cdnsp-mem.c
@@ -882,7 +882,7 @@ static u32 cdnsp_get_endpoint_max_burst(struct usb_gadget *g,
 	if (g->speed == USB_SPEED_HIGH &&
 	    (usb_endpoint_xfer_isoc(pep->endpoint.desc) ||
 	     usb_endpoint_xfer_int(pep->endpoint.desc)))
-		return (usb_endpoint_maxp(pep->endpoint.desc) & 0x1800) >> 11;
+		return usb_endpoint_maxp_mult(pep->endpoint.desc) - 1;
 
 	return 0;
 }
diff --git a/drivers/usb/cdns3/cdnsp-ring.c b/drivers/usb/cdns3/cdnsp-ring.c
index 68972746e363..1b1438457fb0 100644
--- a/drivers/usb/cdns3/cdnsp-ring.c
+++ b/drivers/usb/cdns3/cdnsp-ring.c
@@ -1932,15 +1932,13 @@ int cdnsp_queue_bulk_tx(struct cdnsp_device *pdev, struct cdnsp_request *preq)
 		}
 
 		if (enqd_len + trb_buff_len >= full_len) {
-			if (need_zero_pkt && zero_len_trb) {
-				zero_len_trb = true;
-			} else {
-				field &= ~TRB_CHAIN;
-				field |= TRB_IOC;
-				more_trbs_coming = false;
-				need_zero_pkt = false;
-				preq->td.last_trb = ring->enqueue;
-			}
+			if (need_zero_pkt)
+				zero_len_trb = !zero_len_trb;
+
+			field &= ~TRB_CHAIN;
+			field |= TRB_IOC;
+			more_trbs_coming = false;
+			preq->td.last_trb = ring->enqueue;
 		}
 
 		/* Only set interrupt on short packet for OUT endpoints. */
@@ -1955,7 +1953,7 @@ int cdnsp_queue_bulk_tx(struct cdnsp_device *pdev, struct cdnsp_request *preq)
 		length_field = TRB_LEN(trb_buff_len) | TRB_TD_SIZE(remainder) |
 			TRB_INTR_TARGET(0);
 
-		cdnsp_queue_trb(pdev, ring, more_trbs_coming | need_zero_pkt,
+		cdnsp_queue_trb(pdev, ring, more_trbs_coming | zero_len_trb,
 				lower_32_bits(send_addr),
 				upper_32_bits(send_addr),
 				length_field,
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index e86d13c04bdb..bdc3885c0d49 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -240,15 +240,18 @@ static int ci_ehci_hub_control(
 )
 {
 	struct ehci_hcd	*ehci = hcd_to_ehci(hcd);
+	unsigned int	ports = HCS_N_PORTS(ehci->hcs_params);
 	u32 __iomem	*status_reg;
-	u32		temp;
+	u32		temp, port_index;
 	unsigned long	flags;
 	int		retval = 0;
 	bool		done = false;
 	struct device *dev = hcd->self.controller;
 	struct ci_hdrc *ci = dev_get_drvdata(dev);
 
-	status_reg = &ehci->regs->port_status[(wIndex & 0xff) - 1];
+	port_index = wIndex & 0xff;
+	port_index -= (port_index > 0);
+	status_reg = &ehci->regs->port_status[port_index];
 
 	spin_lock_irqsave(&ehci->lock, flags);
 
@@ -260,6 +263,11 @@ static int ci_ehci_hub_control(
 	}
 
 	if (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_SUSPEND) {
+		if (!wIndex || wIndex > ports) {
+			retval = -EPIPE;
+			goto done;
+		}
+
 		temp = ehci_readl(ehci, status_reg);
 		if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) {
 			retval = -EPIPE;
@@ -288,7 +296,7 @@ static int ci_ehci_hub_control(
 			ehci_writel(ehci, temp, status_reg);
 		}
 
-		set_bit((wIndex & 0xff) - 1, &ehci->suspended_ports);
+		set_bit(port_index, &ehci->suspended_ports);
 		goto done;
 	}
 
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 4895325b16a4..8bbd8e29e60d 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -2027,16 +2027,16 @@ static const struct tty_operations acm_ops = {
 static int __init acm_init(void)
 {
 	int retval;
-	acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
-	if (!acm_tty_driver)
-		return -ENOMEM;
+	acm_tty_driver = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW |
+			TTY_DRIVER_DYNAMIC_DEV);
+	if (IS_ERR(acm_tty_driver))
+		return PTR_ERR(acm_tty_driver);
 	acm_tty_driver->driver_name = "acm",
 	acm_tty_driver->name = "ttyACM",
 	acm_tty_driver->major = ACM_TTY_MAJOR,
 	acm_tty_driver->minor_start = 0,
 	acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
 	acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
-	acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
 	acm_tty_driver->init_termios = tty_std_termios;
 	acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
 								HUPCL | CLOCAL;
@@ -2044,14 +2044,14 @@ static int __init acm_init(void)
 
 	retval = tty_register_driver(acm_tty_driver);
 	if (retval) {
-		put_tty_driver(acm_tty_driver);
+		tty_driver_kref_put(acm_tty_driver);
 		return retval;
 	}
 
 	retval = usb_register(&acm_driver);
 	if (retval) {
 		tty_unregister_driver(acm_tty_driver);
-		put_tty_driver(acm_tty_driver);
+		tty_driver_kref_put(acm_tty_driver);
 		return retval;
 	}
 
@@ -2064,7 +2064,7 @@ static void __exit acm_exit(void)
 {
 	usb_deregister(&acm_driver);
 	tty_unregister_driver(acm_tty_driver);
-	put_tty_driver(acm_tty_driver);
+	tty_driver_kref_put(acm_tty_driver);
 	idr_destroy(&acm_minors);
 }
 
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 74d5a9c5238a..73f419adce61 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -2324,17 +2324,10 @@ static void usbtmc_interrupt(struct urb *urb)
 		dev_err(dev, "overflow with length %d, actual length is %d\n",
 			data->iin_wMaxPacketSize, urb->actual_length);
 		fallthrough;
-	case -ECONNRESET:
-	case -ENOENT:
-	case -ESHUTDOWN:
-	case -EILSEQ:
-	case -ETIME:
-	case -EPIPE:
+	default:
 		/* urb terminated, clean up */
 		dev_dbg(dev, "urb terminated, status: %d\n", status);
 		return;
-	default:
-		dev_err(dev, "unknown status received: %d\n", status);
 	}
 exit:
 	rv = usb_submit_urb(urb, GFP_ATOMIC);
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
index 347fb3d3894a..c9bdeb4ddcb5 100644
--- a/drivers/usb/common/common.c
+++ b/drivers/usb/common/common.c
@@ -201,6 +201,26 @@ enum usb_dr_mode usb_get_dr_mode(struct device *dev)
 EXPORT_SYMBOL_GPL(usb_get_dr_mode);
 
 /**
+ * usb_get_role_switch_default_mode - Get default mode for given device
+ * @dev: Pointer to the given device
+ *
+ * The function gets string from property 'role-switch-default-mode',
+ * and returns the corresponding enum usb_dr_mode.
+ */
+enum usb_dr_mode usb_get_role_switch_default_mode(struct device *dev)
+{
+	const char *str;
+	int ret;
+
+	ret = device_property_read_string(dev, "role-switch-default-mode", &str);
+	if (ret < 0)
+		return USB_DR_MODE_UNKNOWN;
+
+	return usb_get_dr_mode_from_string(str);
+}
+EXPORT_SYMBOL_GPL(usb_get_role_switch_default_mode);
+
+/**
  * usb_decode_interval - Decode bInterval into the time expressed in 1us unit
  * @epd: The descriptor of the endpoint
  * @speed: The speed that the endpoint works as
diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c
index 7e13b74e60e5..4169cf40a03b 100644
--- a/drivers/usb/common/ulpi.c
+++ b/drivers/usb/common/ulpi.c
@@ -78,14 +78,12 @@ static int ulpi_probe(struct device *dev)
 	return drv->probe(to_ulpi_dev(dev));
 }
 
-static int ulpi_remove(struct device *dev)
+static void ulpi_remove(struct device *dev)
 {
 	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);
 
 	if (drv->remove)
 		drv->remove(to_ulpi_dev(dev));
-
-	return 0;
 }
 
 static struct bus_type ulpi_bus = {
diff --git a/drivers/usb/common/usb-otg-fsm.c b/drivers/usb/common/usb-otg-fsm.c
index 3740cf95560e..0697fde51d00 100644
--- a/drivers/usb/common/usb-otg-fsm.c
+++ b/drivers/usb/common/usb-otg-fsm.c
@@ -193,7 +193,11 @@ static void otg_start_hnp_polling(struct otg_fsm *fsm)
 	if (!fsm->host_req_flag)
 		return;
 
-	INIT_DELAYED_WORK(&fsm->hnp_polling_work, otg_hnp_polling_work);
+	if (!fsm->hnp_work_inited) {
+		INIT_DELAYED_WORK(&fsm->hnp_polling_work, otg_hnp_polling_work);
+		fsm->hnp_work_inited = true;
+	}
+
 	schedule_delayed_work(&fsm->hnp_polling_work,
 					msecs_to_jiffies(T_HOST_REQ_POLL));
 }
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 272ae5722c86..cf0bcd0dc320 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -295,7 +295,7 @@ void dwc2_hib_restore_common(struct dwc2_hsotg *hsotg, int rem_wakeup,
 	if (dwc2_hsotg_wait_bit_set(hsotg, GINTSTS, GINTSTS_RESTOREDONE,
 				    20000)) {
 		dev_dbg(hsotg->dev,
-			"%s: Restore Done wan't generated here\n",
+			"%s: Restore Done wasn't generated here\n",
 			__func__);
 	} else {
 		dev_dbg(hsotg->dev, "restore done  generated here\n");
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 483de2bbfaab..cb9059a8444b 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -122,6 +122,7 @@ struct dwc2_hsotg_req;
  * @periodic: Set if this is a periodic ep, such as Interrupt
  * @isochronous: Set if this is a isochronous ep
  * @send_zlp: Set if we need to send a zero-length packet.
+ * @wedged: Set if ep is wedged.
  * @desc_list_dma: The DMA address of descriptor chain currently in use.
  * @desc_list: Pointer to descriptor DMA chain head currently in use.
  * @desc_count: Count of entries within the DMA descriptor chain of EP.
@@ -172,6 +173,7 @@ struct dwc2_hsotg_ep {
 	unsigned int            periodic:1;
 	unsigned int            isochronous:1;
 	unsigned int            send_zlp:1;
+	unsigned int            wedged:1;
 	unsigned int            target_frame;
 #define TARGET_FRAME_INITIAL   0xFFFFFFFF
 	bool			frame_overrun;
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 3146df6e6510..837237e4bc96 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -1806,7 +1806,8 @@ static int dwc2_hsotg_process_req_feature(struct dwc2_hsotg *hsotg,
 		case USB_ENDPOINT_HALT:
 			halted = ep->halted;
 
-			dwc2_hsotg_ep_sethalt(&ep->ep, set, true);
+			if (!ep->wedged)
+				dwc2_hsotg_ep_sethalt(&ep->ep, set, true);
 
 			ret = dwc2_hsotg_send_reply(hsotg, ep0, NULL, 0);
 			if (ret) {
@@ -4066,6 +4067,7 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
 	hs_ep->isochronous = 0;
 	hs_ep->periodic = 0;
 	hs_ep->halted = 0;
+	hs_ep->wedged = 0;
 	hs_ep->interval = desc->bInterval;
 
 	switch (ep_type) {
@@ -4307,6 +4309,27 @@ static int dwc2_hsotg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 }
 
 /**
+ * dwc2_gadget_ep_set_wedge - set wedge on a given endpoint
+ * @ep: The endpoint to be wedged.
+ *
+ */
+static int dwc2_gadget_ep_set_wedge(struct usb_ep *ep)
+{
+	struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
+	struct dwc2_hsotg *hs = hs_ep->parent;
+
+	unsigned long	flags;
+	int		ret;
+
+	spin_lock_irqsave(&hs->lock, flags);
+	hs_ep->wedged = 1;
+	ret = dwc2_hsotg_ep_sethalt(ep, 1, false);
+	spin_unlock_irqrestore(&hs->lock, flags);
+
+	return ret;
+}
+
+/**
  * dwc2_hsotg_ep_sethalt - set halt on a given endpoint
  * @ep: The endpoint to set halt.
  * @value: Set or unset the halt.
@@ -4357,6 +4380,7 @@ static int dwc2_hsotg_ep_sethalt(struct usb_ep *ep, int value, bool now)
 				epctl |= DXEPCTL_EPDIS;
 		} else {
 			epctl &= ~DXEPCTL_STALL;
+			hs_ep->wedged = 0;
 			xfertype = epctl & DXEPCTL_EPTYPE_MASK;
 			if (xfertype == DXEPCTL_EPTYPE_BULK ||
 			    xfertype == DXEPCTL_EPTYPE_INTERRUPT)
@@ -4376,6 +4400,7 @@ static int dwc2_hsotg_ep_sethalt(struct usb_ep *ep, int value, bool now)
 			// STALL bit will be set in GOUTNAKEFF interrupt handler
 		} else {
 			epctl &= ~DXEPCTL_STALL;
+			hs_ep->wedged = 0;
 			xfertype = epctl & DXEPCTL_EPTYPE_MASK;
 			if (xfertype == DXEPCTL_EPTYPE_BULK ||
 			    xfertype == DXEPCTL_EPTYPE_INTERRUPT)
@@ -4415,6 +4440,7 @@ static const struct usb_ep_ops dwc2_hsotg_ep_ops = {
 	.queue		= dwc2_hsotg_ep_queue_lock,
 	.dequeue	= dwc2_hsotg_ep_dequeue,
 	.set_halt	= dwc2_hsotg_ep_sethalt_lock,
+	.set_wedge	= dwc2_gadget_ep_set_wedge,
 	/* note, don't believe we have any call for the fifo routines */
 };
 
@@ -4683,12 +4709,35 @@ static int dwc2_hsotg_vbus_draw(struct usb_gadget *gadget, unsigned int mA)
 	return usb_phy_set_power(hsotg->uphy, mA);
 }
 
+static void dwc2_gadget_set_speed(struct usb_gadget *g, enum usb_device_speed speed)
+{
+	struct dwc2_hsotg *hsotg = to_hsotg(g);
+	unsigned long		flags;
+
+	spin_lock_irqsave(&hsotg->lock, flags);
+	switch (speed) {
+	case USB_SPEED_HIGH:
+		hsotg->params.speed = DWC2_SPEED_PARAM_HIGH;
+		break;
+	case USB_SPEED_FULL:
+		hsotg->params.speed = DWC2_SPEED_PARAM_FULL;
+		break;
+	case USB_SPEED_LOW:
+		hsotg->params.speed = DWC2_SPEED_PARAM_LOW;
+		break;
+	default:
+		dev_err(hsotg->dev, "invalid speed (%d)\n", speed);
+	}
+	spin_unlock_irqrestore(&hsotg->lock, flags);
+}
+
 static const struct usb_gadget_ops dwc2_hsotg_gadget_ops = {
 	.get_frame	= dwc2_hsotg_gadget_getframe,
 	.set_selfpowered	= dwc2_hsotg_set_selfpowered,
 	.udc_start		= dwc2_hsotg_udc_start,
 	.udc_stop		= dwc2_hsotg_udc_stop,
 	.pullup                 = dwc2_hsotg_pullup,
+	.udc_set_speed		= dwc2_gadget_set_speed,
 	.vbus_session		= dwc2_hsotg_vbus_session,
 	.vbus_draw		= dwc2_hsotg_vbus_draw,
 };
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index ba74ad7f6995..01866dcb953b 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1050,6 +1050,15 @@ static int dwc3_core_init(struct dwc3 *dwc)
 		if (!DWC3_VER_IS_PRIOR(DWC3, 290A))
 			reg |= DWC3_GUCTL1_DEV_L1_EXIT_BY_HW;
 
+		/*
+		 * Decouple USB 2.0 L1 & L2 events which will allow for
+		 * gadget driver to only receive U3/L2 suspend & wakeup
+		 * events and prevent the more frequent L1 LPM transitions
+		 * from interrupting the driver.
+		 */
+		if (!DWC3_VER_IS_PRIOR(DWC3, 300A))
+			reg |= DWC3_GUCTL1_DEV_DECOUPLE_L1L2_EVT;
+
 		if (dwc->dis_tx_ipgap_linecheck_quirk)
 			reg |= DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS;
 
@@ -1267,6 +1276,7 @@ static void dwc3_get_properties(struct dwc3 *dwc)
 	u8			rx_max_burst_prd;
 	u8			tx_thr_num_pkt_prd;
 	u8			tx_max_burst_prd;
+	u8			tx_fifo_resize_max_num;
 	const char		*usb_psy_name;
 	int			ret;
 
@@ -1282,6 +1292,13 @@ static void dwc3_get_properties(struct dwc3 *dwc)
 	 */
 	hird_threshold = 12;
 
+	/*
+	 * default to a TXFIFO size large enough to fit 6 max packets.  This
+	 * allows for systems with larger bus latencies to have some headroom
+	 * for endpoints that have a large bMaxBurst value.
+	 */
+	tx_fifo_resize_max_num = 6;
+
 	dwc->maximum_speed = usb_get_maximum_speed(dev);
 	dwc->max_ssp_rate = usb_get_maximum_ssp_rate(dev);
 	dwc->dr_mode = usb_get_dr_mode(dev);
@@ -1325,6 +1342,11 @@ static void dwc3_get_properties(struct dwc3 *dwc)
 				&tx_thr_num_pkt_prd);
 	device_property_read_u8(dev, "snps,tx-max-burst-prd",
 				&tx_max_burst_prd);
+	dwc->do_fifo_resize = device_property_read_bool(dev,
+							"tx-fifo-resize");
+	if (dwc->do_fifo_resize)
+		device_property_read_u8(dev, "tx-fifo-max-num",
+					&tx_fifo_resize_max_num);
 
 	dwc->disable_scramble_quirk = device_property_read_bool(dev,
 				"snps,disable_scramble_quirk");
@@ -1390,6 +1412,8 @@ static void dwc3_get_properties(struct dwc3 *dwc)
 	dwc->tx_max_burst_prd = tx_max_burst_prd;
 
 	dwc->imod_interval = 0;
+
+	dwc->tx_fifo_resize_max_num = tx_fifo_resize_max_num;
 }
 
 /* check whether the core supports IMOD */
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 5991766239ba..5612bfdf37da 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -256,9 +256,10 @@
 #define DWC3_GUCTL_HSTINAUTORETRY	BIT(14)
 
 /* Global User Control 1 Register */
-#define DWC3_GUCTL1_PARKMODE_DISABLE_SS	BIT(17)
+#define DWC3_GUCTL1_DEV_DECOUPLE_L1L2_EVT	BIT(31)
 #define DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS	BIT(28)
-#define DWC3_GUCTL1_DEV_L1_EXIT_BY_HW	BIT(24)
+#define DWC3_GUCTL1_DEV_L1_EXIT_BY_HW		BIT(24)
+#define DWC3_GUCTL1_PARKMODE_DISABLE_SS		BIT(17)
 
 /* Global Status Register */
 #define DWC3_GSTS_OTG_IP	BIT(10)
@@ -1023,6 +1024,7 @@ struct dwc3_scratchpad_array {
  * @rx_max_burst_prd: max periodic ESS receive burst size
  * @tx_thr_num_pkt_prd: periodic ESS transmit packet count
  * @tx_max_burst_prd: max periodic ESS transmit burst size
+ * @tx_fifo_resize_max_num: max number of fifos allocated during txfifo resize
  * @hsphy_interface: "utmi" or "ulpi"
  * @connected: true when we're connected to a host, false otherwise
  * @delayed_status: true when gadget driver asks for delayed status
@@ -1037,6 +1039,7 @@ struct dwc3_scratchpad_array {
  *	1	- utmi_l1_suspend_n
  * @is_fpga: true when we are using the FPGA board
  * @pending_events: true when we have pending IRQs to be handled
+ * @do_fifo_resize: true when txfifo resizing is enabled for dwc3 endpoints
  * @pullups_connected: true when Run/Stop bit is set
  * @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround
  * @three_stage_setup: set if we perform a three phase setup
@@ -1079,6 +1082,11 @@ struct dwc3_scratchpad_array {
  * @dis_split_quirk: set to disable split boundary.
  * @imod_interval: set the interrupt moderation interval in 250ns
  *			increments or 0 to disable.
+ * @max_cfg_eps: current max number of IN eps used across all USB configs.
+ * @last_fifo_depth: last fifo depth used to determine next fifo ram start
+ *		     address.
+ * @num_ep_resized: carries the current number endpoints which have had its tx
+ *		    fifo resized.
  */
 struct dwc3 {
 	struct work_struct	drd_work;
@@ -1233,6 +1241,7 @@ struct dwc3 {
 	u8			rx_max_burst_prd;
 	u8			tx_thr_num_pkt_prd;
 	u8			tx_max_burst_prd;
+	u8			tx_fifo_resize_max_num;
 
 	const char		*hsphy_interface;
 
@@ -1246,6 +1255,7 @@ struct dwc3 {
 	unsigned		is_utmi_l1_suspend:1;
 	unsigned		is_fpga:1;
 	unsigned		pending_events:1;
+	unsigned		do_fifo_resize:1;
 	unsigned		pullups_connected:1;
 	unsigned		setup_packet_pending:1;
 	unsigned		three_stage_setup:1;
@@ -1282,6 +1292,10 @@ struct dwc3 {
 	unsigned		async_callbacks:1;
 
 	u16			imod_interval;
+
+	int			max_cfg_eps;
+	int			last_fifo_depth;
+	int			num_ep_resized;
 };
 
 #define INCRX_BURST_MODE 0
@@ -1513,6 +1527,7 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned int cmd,
 		struct dwc3_gadget_ep_cmd_params *params);
 int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned int cmd,
 		u32 param);
+void dwc3_gadget_clear_tx_fifos(struct dwc3 *dwc);
 #else
 static inline int dwc3_gadget_init(struct dwc3 *dwc)
 { return 0; }
@@ -1532,6 +1547,8 @@ static inline int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned int cmd,
 static inline int dwc3_send_gadget_generic_command(struct dwc3 *dwc,
 		int cmd, u32 param)
 { return 0; }
+static inline void dwc3_gadget_clear_tx_fifos(struct dwc3 *dwc)
+{ }
 #endif
 
 #if IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
index 8fcbac10510c..d7f76835137f 100644
--- a/drivers/usb/dwc3/drd.c
+++ b/drivers/usb/dwc3/drd.c
@@ -541,14 +541,10 @@ static enum usb_role dwc3_usb_role_switch_get(struct usb_role_switch *sw)
 static int dwc3_setup_role_switch(struct dwc3 *dwc)
 {
 	struct usb_role_switch_desc dwc3_role_switch = {NULL};
-	const char *str;
 	u32 mode;
-	int ret;
 
-	ret = device_property_read_string(dwc->dev, "role-switch-default-mode",
-					  &str);
-	if (ret >= 0  && !strncmp(str, "host", strlen("host"))) {
-		dwc->role_switch_default_mode = USB_DR_MODE_HOST;
+	dwc->role_switch_default_mode = usb_get_role_switch_default_mode(dwc->dev);
+	if (dwc->role_switch_default_mode == USB_DR_MODE_HOST) {
 		mode = DWC3_GCTL_PRTCAP_HOST;
 	} else {
 		dwc->role_switch_default_mode = USB_DR_MODE_PERIPHERAL;
diff --git a/drivers/usb/dwc3/dwc3-imx8mp.c b/drivers/usb/dwc3/dwc3-imx8mp.c
index 756faa46d33a..d328d20abfbc 100644
--- a/drivers/usb/dwc3/dwc3-imx8mp.c
+++ b/drivers/usb/dwc3/dwc3-imx8mp.c
@@ -152,13 +152,6 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev)
 	}
 	dwc3_imx->irq = irq;
 
-	err = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx8mp_interrupt,
-					IRQF_ONESHOT, dev_name(dev), dwc3_imx);
-	if (err) {
-		dev_err(dev, "failed to request IRQ #%d --> %d\n", irq, err);
-		goto disable_clks;
-	}
-
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
 	err = pm_runtime_get_sync(dev);
@@ -186,6 +179,13 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev)
 	}
 	of_node_put(dwc3_np);
 
+	err = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx8mp_interrupt,
+					IRQF_ONESHOT, dev_name(dev), dwc3_imx);
+	if (err) {
+		dev_err(dev, "failed to request IRQ #%d --> %d\n", irq, err);
+		goto depopulate;
+	}
+
 	device_set_wakeup_capable(dev, true);
 	pm_runtime_put(dev);
 
diff --git a/drivers/usb/dwc3/dwc3-meson-g12a.c b/drivers/usb/dwc3/dwc3-meson-g12a.c
index ffe301d6ea35..d0f9b7c296b0 100644
--- a/drivers/usb/dwc3/dwc3-meson-g12a.c
+++ b/drivers/usb/dwc3/dwc3-meson-g12a.c
@@ -598,6 +598,8 @@ static int dwc3_meson_g12a_otg_init(struct platform_device *pdev,
 				   USB_R5_ID_DIG_IRQ, 0);
 
 		irq = platform_get_irq(pdev, 0);
+		if (irq < 0)
+			return irq;
 		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 						dwc3_meson_g12a_irq_thread,
 						IRQF_ONESHOT, pdev->name, priv);
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index 2b37bdd39a74..7ff8fc8f79a9 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -44,6 +44,7 @@
 #define PCI_DEVICE_ID_INTEL_ADLM		0x54ee
 #define PCI_DEVICE_ID_INTEL_ADLS		0x7ae1
 #define PCI_DEVICE_ID_INTEL_TGL			0x9a15
+#define PCI_DEVICE_ID_AMD_MR			0x163a
 
 #define PCI_INTEL_BXT_DSM_GUID		"732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
 #define PCI_INTEL_BXT_FUNC_PMU_PWR	4
@@ -148,6 +149,14 @@ static const struct property_entry dwc3_pci_amd_properties[] = {
 	{}
 };
 
+static const struct property_entry dwc3_pci_mr_properties[] = {
+	PROPERTY_ENTRY_STRING("dr_mode", "otg"),
+	PROPERTY_ENTRY_BOOL("usb-role-switch"),
+	PROPERTY_ENTRY_STRING("role-switch-default-mode", "host"),
+	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
+	{}
+};
+
 static const struct software_node dwc3_pci_intel_swnode = {
 	.properties = dwc3_pci_intel_properties,
 };
@@ -160,6 +169,10 @@ static const struct software_node dwc3_pci_amd_swnode = {
 	.properties = dwc3_pci_amd_properties,
 };
 
+static const struct software_node dwc3_pci_amd_mr_swnode = {
+	.properties = dwc3_pci_mr_properties,
+};
+
 static int dwc3_pci_quirks(struct dwc3_pci *dwc)
 {
 	struct pci_dev			*pdev = dwc->pci;
@@ -401,6 +414,10 @@ static const struct pci_device_id dwc3_pci_id_table[] = {
 
 	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_NL_USB),
 	  (kernel_ulong_t) &dwc3_pci_amd_swnode, },
+
+	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_MR),
+	  (kernel_ulong_t)&dwc3_pci_amd_mr_swnode, },
+
 	{  }	/* Terminating Entry */
 };
 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 49e6ca94486d..9abbd01028c5 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -115,7 +115,7 @@ static inline void dwc3_qcom_clrbits(void __iomem *base, u32 offset, u32 val)
 	readl(base + offset);
 }
 
-static void dwc3_qcom_vbus_overrride_enable(struct dwc3_qcom *qcom, bool enable)
+static void dwc3_qcom_vbus_override_enable(struct dwc3_qcom *qcom, bool enable)
 {
 	if (enable) {
 		dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_SS_PHY_CTRL,
@@ -136,7 +136,7 @@ static int dwc3_qcom_vbus_notifier(struct notifier_block *nb,
 	struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, vbus_nb);
 
 	/* enable vbus override for device mode */
-	dwc3_qcom_vbus_overrride_enable(qcom, event);
+	dwc3_qcom_vbus_override_enable(qcom, event);
 	qcom->mode = event ? USB_DR_MODE_PERIPHERAL : USB_DR_MODE_HOST;
 
 	return NOTIFY_DONE;
@@ -148,7 +148,7 @@ static int dwc3_qcom_host_notifier(struct notifier_block *nb,
 	struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, host_nb);
 
 	/* disable vbus override in host mode */
-	dwc3_qcom_vbus_overrride_enable(qcom, !event);
+	dwc3_qcom_vbus_override_enable(qcom, !event);
 	qcom->mode = event ? USB_DR_MODE_HOST : USB_DR_MODE_PERIPHERAL;
 
 	return NOTIFY_DONE;
@@ -614,6 +614,10 @@ static int dwc3_qcom_acpi_register_core(struct platform_device *pdev)
 		qcom->acpi_pdata->dwc3_core_base_size;
 
 	irq = platform_get_irq(pdev_irq, 0);
+	if (irq < 0) {
+		ret = irq;
+		goto out;
+	}
 	child_res[1].flags = IORESOURCE_IRQ;
 	child_res[1].start = child_res[1].end = irq;
 
@@ -645,6 +649,7 @@ static int dwc3_qcom_of_register_core(struct platform_device *pdev)
 	struct dwc3_qcom	*qcom = platform_get_drvdata(pdev);
 	struct device_node	*np = pdev->dev.of_node, *dwc3_np;
 	struct device		*dev = &pdev->dev;
+	struct property		*prop;
 	int			ret;
 
 	dwc3_np = of_get_compatible_child(np, "snps,dwc3");
@@ -653,6 +658,20 @@ static int dwc3_qcom_of_register_core(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	prop = devm_kzalloc(dev, sizeof(*prop), GFP_KERNEL);
+	if (!prop) {
+		ret = -ENOMEM;
+		dev_err(dev, "unable to allocate memory for property\n");
+		goto node_put;
+	}
+
+	prop->name = "tx-fifo-resize";
+	ret = of_add_property(dwc3_np, prop);
+	if (ret) {
+		dev_err(dev, "unable to add property\n");
+		goto node_put;
+	}
+
 	ret = of_platform_populate(np, NULL, NULL, dev);
 	if (ret) {
 		dev_err(dev, "failed to register dwc3 core - %d\n", ret);
@@ -811,7 +830,7 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
 
 	/* enable vbus override for device mode */
 	if (qcom->mode == USB_DR_MODE_PERIPHERAL)
-		dwc3_qcom_vbus_overrride_enable(qcom, true);
+		dwc3_qcom_vbus_override_enable(qcom, true);
 
 	/* register extcon to override sw_vbus on Vbus change later */
 	ret = dwc3_qcom_register_extcon(qcom);
@@ -916,6 +935,7 @@ static const struct of_device_id dwc3_qcom_of_match[] = {
 	{ .compatible = "qcom,dwc3" },
 	{ .compatible = "qcom,msm8996-dwc3" },
 	{ .compatible = "qcom,msm8998-dwc3" },
+	{ .compatible = "qcom,sdm660-dwc3" },
 	{ .compatible = "qcom,sdm845-dwc3" },
 	{ }
 };
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 2f9e45eed228..658739410992 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -621,6 +621,8 @@ static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
 		return -EINVAL;
 
 	case USB_STATE_ADDRESS:
+		dwc3_gadget_clear_tx_fifos(dwc);
+
 		ret = dwc3_ep0_delegate_req(dwc, ctrl);
 		/* if the cfg matches and the cfg is non zero */
 		if (cfg && (!ret || (ret == USB_GADGET_DELAYED_STATUS))) {
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 45f2bc0807e8..804b50548163 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -632,6 +632,187 @@ static void dwc3_stop_active_transfer(struct dwc3_ep *dep, bool force,
 		bool interrupt);
 
 /**
+ * dwc3_gadget_calc_tx_fifo_size - calculates the txfifo size value
+ * @dwc: pointer to the DWC3 context
+ * @nfifos: number of fifos to calculate for
+ *
+ * Calculates the size value based on the equation below:
+ *
+ * DWC3 revision 280A and prior:
+ * fifo_size = mult * (max_packet / mdwidth) + 1;
+ *
+ * DWC3 revision 290A and onwards:
+ * fifo_size = mult * ((max_packet + mdwidth)/mdwidth + 1) + 1
+ *
+ * The max packet size is set to 1024, as the txfifo requirements mainly apply
+ * to super speed USB use cases.  However, it is safe to overestimate the fifo
+ * allocations for other scenarios, i.e. high speed USB.
+ */
+static int dwc3_gadget_calc_tx_fifo_size(struct dwc3 *dwc, int mult)
+{
+	int max_packet = 1024;
+	int fifo_size;
+	int mdwidth;
+
+	mdwidth = dwc3_mdwidth(dwc);
+
+	/* MDWIDTH is represented in bits, we need it in bytes */
+	mdwidth >>= 3;
+
+	if (DWC3_VER_IS_PRIOR(DWC3, 290A))
+		fifo_size = mult * (max_packet / mdwidth) + 1;
+	else
+		fifo_size = mult * ((max_packet + mdwidth) / mdwidth) + 1;
+	return fifo_size;
+}
+
+/**
+ * dwc3_gadget_clear_tx_fifo_size - Clears txfifo allocation
+ * @dwc: pointer to the DWC3 context
+ *
+ * Iterates through all the endpoint registers and clears the previous txfifo
+ * allocations.
+ */
+void dwc3_gadget_clear_tx_fifos(struct dwc3 *dwc)
+{
+	struct dwc3_ep *dep;
+	int fifo_depth;
+	int size;
+	int num;
+
+	if (!dwc->do_fifo_resize)
+		return;
+
+	/* Read ep0IN related TXFIFO size */
+	dep = dwc->eps[1];
+	size = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(0));
+	if (DWC3_IP_IS(DWC3))
+		fifo_depth = DWC3_GTXFIFOSIZ_TXFDEP(size);
+	else
+		fifo_depth = DWC31_GTXFIFOSIZ_TXFDEP(size);
+
+	dwc->last_fifo_depth = fifo_depth;
+	/* Clear existing TXFIFO for all IN eps except ep0 */
+	for (num = 3; num < min_t(int, dwc->num_eps, DWC3_ENDPOINTS_NUM);
+	     num += 2) {
+		dep = dwc->eps[num];
+		/* Don't change TXFRAMNUM on usb31 version */
+		size = DWC3_IP_IS(DWC3) ? 0 :
+			dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(num >> 1)) &
+				   DWC31_GTXFIFOSIZ_TXFRAMNUM;
+
+		dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(num >> 1), size);
+	}
+	dwc->num_ep_resized = 0;
+}
+
+/*
+ * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case
+ * @dwc: pointer to our context structure
+ *
+ * This function will a best effort FIFO allocation in order
+ * to improve FIFO usage and throughput, while still allowing
+ * us to enable as many endpoints as possible.
+ *
+ * Keep in mind that this operation will be highly dependent
+ * on the configured size for RAM1 - which contains TxFifo -,
+ * the amount of endpoints enabled on coreConsultant tool, and
+ * the width of the Master Bus.
+ *
+ * In general, FIFO depths are represented with the following equation:
+ *
+ * fifo_size = mult * ((max_packet + mdwidth)/mdwidth + 1) + 1
+ *
+ * In conjunction with dwc3_gadget_check_config(), this resizing logic will
+ * ensure that all endpoints will have enough internal memory for one max
+ * packet per endpoint.
+ */
+static int dwc3_gadget_resize_tx_fifos(struct dwc3_ep *dep)
+{
+	struct dwc3 *dwc = dep->dwc;
+	int fifo_0_start;
+	int ram1_depth;
+	int fifo_size;
+	int min_depth;
+	int num_in_ep;
+	int remaining;
+	int num_fifos = 1;
+	int fifo;
+	int tmp;
+
+	if (!dwc->do_fifo_resize)
+		return 0;
+
+	/* resize IN endpoints except ep0 */
+	if (!usb_endpoint_dir_in(dep->endpoint.desc) || dep->number <= 1)
+		return 0;
+
+	ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7);
+
+	if ((dep->endpoint.maxburst > 1 &&
+	     usb_endpoint_xfer_bulk(dep->endpoint.desc)) ||
+	    usb_endpoint_xfer_isoc(dep->endpoint.desc))
+		num_fifos = 3;
+
+	if (dep->endpoint.maxburst > 6 &&
+	    usb_endpoint_xfer_bulk(dep->endpoint.desc) && DWC3_IP_IS(DWC31))
+		num_fifos = dwc->tx_fifo_resize_max_num;
+
+	/* FIFO size for a single buffer */
+	fifo = dwc3_gadget_calc_tx_fifo_size(dwc, 1);
+
+	/* Calculate the number of remaining EPs w/o any FIFO */
+	num_in_ep = dwc->max_cfg_eps;
+	num_in_ep -= dwc->num_ep_resized;
+
+	/* Reserve at least one FIFO for the number of IN EPs */
+	min_depth = num_in_ep * (fifo + 1);
+	remaining = ram1_depth - min_depth - dwc->last_fifo_depth;
+	remaining = max_t(int, 0, remaining);
+	/*
+	 * We've already reserved 1 FIFO per EP, so check what we can fit in
+	 * addition to it.  If there is not enough remaining space, allocate
+	 * all the remaining space to the EP.
+	 */
+	fifo_size = (num_fifos - 1) * fifo;
+	if (remaining < fifo_size)
+		fifo_size = remaining;
+
+	fifo_size += fifo;
+	/* Last increment according to the TX FIFO size equation */
+	fifo_size++;
+
+	/* Check if TXFIFOs start at non-zero addr */
+	tmp = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(0));
+	fifo_0_start = DWC3_GTXFIFOSIZ_TXFSTADDR(tmp);
+
+	fifo_size |= (fifo_0_start + (dwc->last_fifo_depth << 16));
+	if (DWC3_IP_IS(DWC3))
+		dwc->last_fifo_depth += DWC3_GTXFIFOSIZ_TXFDEP(fifo_size);
+	else
+		dwc->last_fifo_depth += DWC31_GTXFIFOSIZ_TXFDEP(fifo_size);
+
+	/* Check fifo size allocation doesn't exceed available RAM size. */
+	if (dwc->last_fifo_depth >= ram1_depth) {
+		dev_err(dwc->dev, "Fifosize(%d) > RAM size(%d) %s depth:%d\n",
+			dwc->last_fifo_depth, ram1_depth,
+			dep->endpoint.name, fifo_size);
+		if (DWC3_IP_IS(DWC3))
+			fifo_size = DWC3_GTXFIFOSIZ_TXFDEP(fifo_size);
+		else
+			fifo_size = DWC31_GTXFIFOSIZ_TXFDEP(fifo_size);
+
+		dwc->last_fifo_depth -= fifo_size;
+		return -ENOMEM;
+	}
+
+	dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(dep->number >> 1), fifo_size);
+	dwc->num_ep_resized++;
+
+	return 0;
+}
+
+/**
  * __dwc3_gadget_ep_enable - initializes a hw endpoint
  * @dep: endpoint to be initialized
  * @action: one of INIT, MODIFY or RESTORE
@@ -648,6 +829,10 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action)
 	int			ret;
 
 	if (!(dep->flags & DWC3_EP_ENABLED)) {
+		ret = dwc3_gadget_resize_tx_fifos(dep);
+		if (ret)
+			return ret;
+
 		ret = dwc3_gadget_start_config(dep);
 		if (ret)
 			return ret;
@@ -940,19 +1125,19 @@ static struct dwc3_trb *dwc3_ep_prev_trb(struct dwc3_ep *dep, u8 index)
 
 static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep)
 {
-	struct dwc3_trb		*tmp;
 	u8			trbs_left;
 
 	/*
-	 * If enqueue & dequeue are equal than it is either full or empty.
-	 *
-	 * One way to know for sure is if the TRB right before us has HWO bit
-	 * set or not. If it has, then we're definitely full and can't fit any
-	 * more transfers in our ring.
+	 * If the enqueue & dequeue are equal then the TRB ring is either full
+	 * or empty. It's considered full when there are DWC3_TRB_NUM-1 of TRBs
+	 * pending to be processed by the driver.
 	 */
 	if (dep->trb_enqueue == dep->trb_dequeue) {
-		tmp = dwc3_ep_prev_trb(dep, dep->trb_enqueue);
-		if (tmp->ctrl & DWC3_TRB_CTRL_HWO)
+		/*
+		 * If there is any request remained in the started_list at
+		 * this point, that means there is no TRB available.
+		 */
+		if (!list_empty(&dep->started_list))
 			return 0;
 
 		return DWC3_TRB_NUM - 1;
@@ -2243,10 +2428,19 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
 
 		ret = wait_for_completion_timeout(&dwc->ep0_in_setup,
 				msecs_to_jiffies(DWC3_PULL_UP_TIMEOUT));
-		if (ret == 0) {
-			dev_err(dwc->dev, "timed out waiting for SETUP phase\n");
-			return -ETIMEDOUT;
-		}
+		if (ret == 0)
+			dev_warn(dwc->dev, "timed out waiting for SETUP phase\n");
+	}
+
+	/*
+	 * Avoid issuing a runtime resume if the device is already in the
+	 * suspended state during gadget disconnect.  DWC3 gadget was already
+	 * halted/stopped during runtime suspend.
+	 */
+	if (!is_on) {
+		pm_runtime_barrier(dwc->dev);
+		if (pm_runtime_suspended(dwc->dev))
+			return 0;
 	}
 
 	/*
@@ -2447,6 +2641,7 @@ static int __dwc3_gadget_start(struct dwc3 *dwc)
 	/* begin to receive SETUP packets */
 	dwc->ep0state = EP0_SETUP_PHASE;
 	dwc->link_state = DWC3_LINK_STATE_SS_DIS;
+	dwc->delayed_status = false;
 	dwc3_ep0_out_start(dwc);
 
 	dwc3_gadget_enable_irq(dwc);
@@ -2498,6 +2693,7 @@ static int dwc3_gadget_stop(struct usb_gadget *g)
 
 	spin_lock_irqsave(&dwc->lock, flags);
 	dwc->gadget_driver	= NULL;
+	dwc->max_cfg_eps = 0;
 	spin_unlock_irqrestore(&dwc->lock, flags);
 
 	free_irq(dwc->irq_gadget, dwc->ev_buf);
@@ -2585,6 +2781,51 @@ static int dwc3_gadget_vbus_draw(struct usb_gadget *g, unsigned int mA)
 	return ret;
 }
 
+/**
+ * dwc3_gadget_check_config - ensure dwc3 can support the USB configuration
+ * @g: pointer to the USB gadget
+ *
+ * Used to record the maximum number of endpoints being used in a USB composite
+ * device. (across all configurations)  This is to be used in the calculation
+ * of the TXFIFO sizes when resizing internal memory for individual endpoints.
+ * It will help ensured that the resizing logic reserves enough space for at
+ * least one max packet.
+ */
+static int dwc3_gadget_check_config(struct usb_gadget *g)
+{
+	struct dwc3 *dwc = gadget_to_dwc(g);
+	struct usb_ep *ep;
+	int fifo_size = 0;
+	int ram1_depth;
+	int ep_num = 0;
+
+	if (!dwc->do_fifo_resize)
+		return 0;
+
+	list_for_each_entry(ep, &g->ep_list, ep_list) {
+		/* Only interested in the IN endpoints */
+		if (ep->claimed && (ep->address & USB_DIR_IN))
+			ep_num++;
+	}
+
+	if (ep_num <= dwc->max_cfg_eps)
+		return 0;
+
+	/* Update the max number of eps in the composition */
+	dwc->max_cfg_eps = ep_num;
+
+	fifo_size = dwc3_gadget_calc_tx_fifo_size(dwc, dwc->max_cfg_eps);
+	/* Based on the equation, increment by one for every ep */
+	fifo_size += dwc->max_cfg_eps;
+
+	/* Check if we can fit a single fifo per endpoint */
+	ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7);
+	if (fifo_size > ram1_depth)
+		return -ENOMEM;
+
+	return 0;
+}
+
 static void dwc3_gadget_async_callbacks(struct usb_gadget *g, bool enable)
 {
 	struct dwc3		*dwc = gadget_to_dwc(g);
@@ -2606,6 +2847,7 @@ static const struct usb_gadget_ops dwc3_gadget_ops = {
 	.udc_set_ssp_rate	= dwc3_gadget_set_ssp_rate,
 	.get_config_params	= dwc3_gadget_config_params,
 	.vbus_draw		= dwc3_gadget_vbus_draw,
+	.check_config		= dwc3_gadget_check_config,
 	.udc_async_callbacks	= dwc3_gadget_async_callbacks,
 };
 
@@ -4001,7 +4243,7 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 	}
 
 
-	usb_initialize_gadget(dwc->dev, dwc->gadget, dwc_gadget_release);
+	usb_initialize_gadget(dwc->sysdev, dwc->gadget, dwc_gadget_release);
 	dev				= &dwc->gadget->dev;
 	dev->platform_data		= dwc;
 	dwc->gadget->ops		= &dwc3_gadget_ops;
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 2d152571a7de..dd58094f0b85 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -450,6 +450,7 @@ config USB_CONFIGFS_F_UVC
 	depends on USB_CONFIGFS
 	depends on VIDEO_V4L2
 	depends on VIDEO_DEV
+	select VIDEOBUF2_DMA_SG
 	select VIDEOBUF2_VMALLOC
 	select USB_F_UVC
 	help
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 72a9797dbbae..504c1cbc255d 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -482,7 +482,7 @@ static u8 encode_bMaxPower(enum usb_device_speed speed,
 {
 	unsigned val;
 
-	if (c->MaxPower)
+	if (c->MaxPower || (c->bmAttributes & USB_CONFIG_ATT_SELFPOWER))
 		val = c->MaxPower;
 	else
 		val = CONFIG_USB_GADGET_VBUS_DRAW;
@@ -936,7 +936,11 @@ static int set_config(struct usb_composite_dev *cdev,
 	}
 
 	/* when we return, be sure our power usage is valid */
-	power = c->MaxPower ? c->MaxPower : CONFIG_USB_GADGET_VBUS_DRAW;
+	if (c->MaxPower || (c->bmAttributes & USB_CONFIG_ATT_SELFPOWER))
+		power = c->MaxPower;
+	else
+		power = CONFIG_USB_GADGET_VBUS_DRAW;
+
 	if (gadget->speed < USB_SPEED_SUPER)
 		power = min(power, 500U);
 	else
diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c
index 15a607ccef8a..477e72a1d11e 100644
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -55,7 +55,7 @@ struct gadget_info {
 
 static inline struct gadget_info *to_gadget_info(struct config_item *item)
 {
-	 return container_of(to_config_group(item), struct gadget_info, group);
+	return container_of(to_config_group(item), struct gadget_info, group);
 }
 
 struct config_usb_cfg {
@@ -365,21 +365,21 @@ static struct configfs_attribute *gadget_root_attrs[] = {
 
 static inline struct gadget_strings *to_gadget_strings(struct config_item *item)
 {
-	 return container_of(to_config_group(item), struct gadget_strings,
+	return container_of(to_config_group(item), struct gadget_strings,
 			 group);
 }
 
 static inline struct gadget_config_name *to_gadget_config_name(
 		struct config_item *item)
 {
-	 return container_of(to_config_group(item), struct gadget_config_name,
+	return container_of(to_config_group(item), struct gadget_config_name,
 			 group);
 }
 
 static inline struct usb_function_instance *to_usb_function_instance(
 		struct config_item *item)
 {
-	 return container_of(to_config_group(item),
+	return container_of(to_config_group(item),
 			 struct usb_function_instance, group);
 }
 
@@ -1404,6 +1404,10 @@ static int configfs_composite_bind(struct usb_gadget *gadget,
 				goto err_purge_funcs;
 			}
 		}
+		ret = usb_gadget_check_config(cdev->gadget);
+		if (ret)
+			goto err_purge_funcs;
+
 		usb_ep_autoconfig_reset(cdev->gadget);
 	}
 	if (cdev->use_os_string) {
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 9c0c393abb39..8260f38025b7 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -2081,7 +2081,7 @@ static int __must_check ffs_do_single_desc(char *data, unsigned len,
 		break;
 
 	case USB_TYPE_CLASS | 0x01:
-                if (*current_class == USB_INTERFACE_CLASS_HID) {
+		if (*current_class == USB_INTERFACE_CLASS_HID) {
 			pr_vdebug("hid descriptor\n");
 			if (length != sizeof(struct hid_descriptor))
 				goto inv_length;
@@ -3831,7 +3831,7 @@ static char *ffs_prepare_buffer(const char __user *buf, size_t len)
 
 	data = memdup_user(buf, len);
 	if (IS_ERR(data))
-		return ERR_PTR(PTR_ERR(data));
+		return data;
 
 	pr_vdebug("Buffer from user space:\n");
 	ffs_dump_mem("", data, len);
diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
index 02683ac0719d..ca0a7d9eaa34 100644
--- a/drivers/usb/gadget/function/f_hid.c
+++ b/drivers/usb/gadget/function/f_hid.c
@@ -41,15 +41,29 @@ struct f_hidg {
 	unsigned char			bInterfaceSubClass;
 	unsigned char			bInterfaceProtocol;
 	unsigned char			protocol;
+	unsigned char			idle;
 	unsigned short			report_desc_length;
 	char				*report_desc;
 	unsigned short			report_length;
+	/*
+	 * use_out_ep - if true, the OUT Endpoint (interrupt out method)
+	 *              will be used to receive reports from the host
+	 *              using functions with the "intout" suffix.
+	 *              Otherwise, the OUT Endpoint will not be configured
+	 *              and the SETUP/SET_REPORT method ("ssreport" suffix)
+	 *              will be used to receive reports.
+	 */
+	bool				use_out_ep;
 
 	/* recv report */
-	struct list_head		completed_out_req;
 	spinlock_t			read_spinlock;
 	wait_queue_head_t		read_queue;
+	/* recv report - interrupt out only (use_out_ep == 1) */
+	struct list_head		completed_out_req;
 	unsigned int			qlen;
+	/* recv report - setup set_report only (use_out_ep == 0) */
+	char				*set_report_buf;
+	unsigned int			set_report_length;
 
 	/* send report */
 	spinlock_t			write_spinlock;
@@ -78,7 +92,7 @@ static struct usb_interface_descriptor hidg_interface_desc = {
 	.bDescriptorType	= USB_DT_INTERFACE,
 	/* .bInterfaceNumber	= DYNAMIC */
 	.bAlternateSetting	= 0,
-	.bNumEndpoints		= 2,
+	/* .bNumEndpoints	= DYNAMIC (depends on use_out_ep) */
 	.bInterfaceClass	= USB_CLASS_HID,
 	/* .bInterfaceSubClass	= DYNAMIC */
 	/* .bInterfaceProtocol	= DYNAMIC */
@@ -139,7 +153,7 @@ static struct usb_ss_ep_comp_descriptor hidg_ss_out_comp_desc = {
 	/* .wBytesPerInterval   = DYNAMIC */
 };
 
-static struct usb_descriptor_header *hidg_ss_descriptors[] = {
+static struct usb_descriptor_header *hidg_ss_descriptors_intout[] = {
 	(struct usb_descriptor_header *)&hidg_interface_desc,
 	(struct usb_descriptor_header *)&hidg_desc,
 	(struct usb_descriptor_header *)&hidg_ss_in_ep_desc,
@@ -149,6 +163,14 @@ static struct usb_descriptor_header *hidg_ss_descriptors[] = {
 	NULL,
 };
 
+static struct usb_descriptor_header *hidg_ss_descriptors_ssreport[] = {
+	(struct usb_descriptor_header *)&hidg_interface_desc,
+	(struct usb_descriptor_header *)&hidg_desc,
+	(struct usb_descriptor_header *)&hidg_ss_in_ep_desc,
+	(struct usb_descriptor_header *)&hidg_ss_in_comp_desc,
+	NULL,
+};
+
 /* High-Speed Support */
 
 static struct usb_endpoint_descriptor hidg_hs_in_ep_desc = {
@@ -175,7 +197,7 @@ static struct usb_endpoint_descriptor hidg_hs_out_ep_desc = {
 				      */
 };
 
-static struct usb_descriptor_header *hidg_hs_descriptors[] = {
+static struct usb_descriptor_header *hidg_hs_descriptors_intout[] = {
 	(struct usb_descriptor_header *)&hidg_interface_desc,
 	(struct usb_descriptor_header *)&hidg_desc,
 	(struct usb_descriptor_header *)&hidg_hs_in_ep_desc,
@@ -183,6 +205,13 @@ static struct usb_descriptor_header *hidg_hs_descriptors[] = {
 	NULL,
 };
 
+static struct usb_descriptor_header *hidg_hs_descriptors_ssreport[] = {
+	(struct usb_descriptor_header *)&hidg_interface_desc,
+	(struct usb_descriptor_header *)&hidg_desc,
+	(struct usb_descriptor_header *)&hidg_hs_in_ep_desc,
+	NULL,
+};
+
 /* Full-Speed Support */
 
 static struct usb_endpoint_descriptor hidg_fs_in_ep_desc = {
@@ -209,7 +238,7 @@ static struct usb_endpoint_descriptor hidg_fs_out_ep_desc = {
 				       */
 };
 
-static struct usb_descriptor_header *hidg_fs_descriptors[] = {
+static struct usb_descriptor_header *hidg_fs_descriptors_intout[] = {
 	(struct usb_descriptor_header *)&hidg_interface_desc,
 	(struct usb_descriptor_header *)&hidg_desc,
 	(struct usb_descriptor_header *)&hidg_fs_in_ep_desc,
@@ -217,6 +246,13 @@ static struct usb_descriptor_header *hidg_fs_descriptors[] = {
 	NULL,
 };
 
+static struct usb_descriptor_header *hidg_fs_descriptors_ssreport[] = {
+	(struct usb_descriptor_header *)&hidg_interface_desc,
+	(struct usb_descriptor_header *)&hidg_desc,
+	(struct usb_descriptor_header *)&hidg_fs_in_ep_desc,
+	NULL,
+};
+
 /*-------------------------------------------------------------------------*/
 /*                                 Strings                                 */
 
@@ -240,8 +276,8 @@ static struct usb_gadget_strings *ct_func_strings[] = {
 /*-------------------------------------------------------------------------*/
 /*                              Char Device                                */
 
-static ssize_t f_hidg_read(struct file *file, char __user *buffer,
-			size_t count, loff_t *ptr)
+static ssize_t f_hidg_intout_read(struct file *file, char __user *buffer,
+				  size_t count, loff_t *ptr)
 {
 	struct f_hidg *hidg = file->private_data;
 	struct f_hidg_req_list *list;
@@ -254,15 +290,15 @@ static ssize_t f_hidg_read(struct file *file, char __user *buffer,
 
 	spin_lock_irqsave(&hidg->read_spinlock, flags);
 
-#define READ_COND (!list_empty(&hidg->completed_out_req))
+#define READ_COND_INTOUT (!list_empty(&hidg->completed_out_req))
 
 	/* wait for at least one buffer to complete */
-	while (!READ_COND) {
+	while (!READ_COND_INTOUT) {
 		spin_unlock_irqrestore(&hidg->read_spinlock, flags);
 		if (file->f_flags & O_NONBLOCK)
 			return -EAGAIN;
 
-		if (wait_event_interruptible(hidg->read_queue, READ_COND))
+		if (wait_event_interruptible(hidg->read_queue, READ_COND_INTOUT))
 			return -ERESTARTSYS;
 
 		spin_lock_irqsave(&hidg->read_spinlock, flags);
@@ -312,6 +348,60 @@ static ssize_t f_hidg_read(struct file *file, char __user *buffer,
 	return count;
 }
 
+#define READ_COND_SSREPORT (hidg->set_report_buf != NULL)
+
+static ssize_t f_hidg_ssreport_read(struct file *file, char __user *buffer,
+				    size_t count, loff_t *ptr)
+{
+	struct f_hidg *hidg = file->private_data;
+	char *tmp_buf = NULL;
+	unsigned long flags;
+
+	if (!count)
+		return 0;
+
+	spin_lock_irqsave(&hidg->read_spinlock, flags);
+
+	while (!READ_COND_SSREPORT) {
+		spin_unlock_irqrestore(&hidg->read_spinlock, flags);
+		if (file->f_flags & O_NONBLOCK)
+			return -EAGAIN;
+
+		if (wait_event_interruptible(hidg->read_queue, READ_COND_SSREPORT))
+			return -ERESTARTSYS;
+
+		spin_lock_irqsave(&hidg->read_spinlock, flags);
+	}
+
+	count = min_t(unsigned int, count, hidg->set_report_length);
+	tmp_buf = hidg->set_report_buf;
+	hidg->set_report_buf = NULL;
+
+	spin_unlock_irqrestore(&hidg->read_spinlock, flags);
+
+	if (tmp_buf != NULL) {
+		count -= copy_to_user(buffer, tmp_buf, count);
+		kfree(tmp_buf);
+	} else {
+		count = -ENOMEM;
+	}
+
+	wake_up(&hidg->read_queue);
+
+	return count;
+}
+
+static ssize_t f_hidg_read(struct file *file, char __user *buffer,
+			   size_t count, loff_t *ptr)
+{
+	struct f_hidg *hidg = file->private_data;
+
+	if (hidg->use_out_ep)
+		return f_hidg_intout_read(file, buffer, count, ptr);
+	else
+		return f_hidg_ssreport_read(file, buffer, count, ptr);
+}
+
 static void f_hidg_req_complete(struct usb_ep *ep, struct usb_request *req)
 {
 	struct f_hidg *hidg = (struct f_hidg *)ep->driver_data;
@@ -338,6 +428,11 @@ static ssize_t f_hidg_write(struct file *file, const char __user *buffer,
 
 	spin_lock_irqsave(&hidg->write_spinlock, flags);
 
+	if (!hidg->req) {
+		spin_unlock_irqrestore(&hidg->write_spinlock, flags);
+		return -ESHUTDOWN;
+	}
+
 #define WRITE_COND (!hidg->write_pending)
 try_again:
 	/* write queue */
@@ -358,8 +453,14 @@ try_again:
 	count  = min_t(unsigned, count, hidg->report_length);
 
 	spin_unlock_irqrestore(&hidg->write_spinlock, flags);
-	status = copy_from_user(req->buf, buffer, count);
 
+	if (!req) {
+		ERROR(hidg->func.config->cdev, "hidg->req is NULL\n");
+		status = -ESHUTDOWN;
+		goto release_write_pending;
+	}
+
+	status = copy_from_user(req->buf, buffer, count);
 	if (status != 0) {
 		ERROR(hidg->func.config->cdev,
 			"copy_from_user error\n");
@@ -387,14 +488,17 @@ try_again:
 
 	spin_unlock_irqrestore(&hidg->write_spinlock, flags);
 
+	if (!hidg->in_ep->enabled) {
+		ERROR(hidg->func.config->cdev, "in_ep is disabled\n");
+		status = -ESHUTDOWN;
+		goto release_write_pending;
+	}
+
 	status = usb_ep_queue(hidg->in_ep, req, GFP_ATOMIC);
-	if (status < 0) {
-		ERROR(hidg->func.config->cdev,
-			"usb_ep_queue error on int endpoint %zd\n", status);
+	if (status < 0)
 		goto release_write_pending;
-	} else {
+	else
 		status = count;
-	}
 
 	return status;
 release_write_pending:
@@ -418,14 +522,20 @@ static __poll_t f_hidg_poll(struct file *file, poll_table *wait)
 	if (WRITE_COND)
 		ret |= EPOLLOUT | EPOLLWRNORM;
 
-	if (READ_COND)
-		ret |= EPOLLIN | EPOLLRDNORM;
+	if (hidg->use_out_ep) {
+		if (READ_COND_INTOUT)
+			ret |= EPOLLIN | EPOLLRDNORM;
+	} else {
+		if (READ_COND_SSREPORT)
+			ret |= EPOLLIN | EPOLLRDNORM;
+	}
 
 	return ret;
 }
 
 #undef WRITE_COND
-#undef READ_COND
+#undef READ_COND_SSREPORT
+#undef READ_COND_INTOUT
 
 static int f_hidg_release(struct inode *inode, struct file *fd)
 {
@@ -452,7 +562,7 @@ static inline struct usb_request *hidg_alloc_ep_req(struct usb_ep *ep,
 	return alloc_ep_req(ep, length);
 }
 
-static void hidg_set_report_complete(struct usb_ep *ep, struct usb_request *req)
+static void hidg_intout_complete(struct usb_ep *ep, struct usb_request *req)
 {
 	struct f_hidg *hidg = (struct f_hidg *) req->context;
 	struct usb_composite_dev *cdev = hidg->func.config->cdev;
@@ -487,6 +597,37 @@ free_req:
 	}
 }
 
+static void hidg_ssreport_complete(struct usb_ep *ep, struct usb_request *req)
+{
+	struct f_hidg *hidg = (struct f_hidg *)req->context;
+	struct usb_composite_dev *cdev = hidg->func.config->cdev;
+	char *new_buf = NULL;
+	unsigned long flags;
+
+	if (req->status != 0 || req->buf == NULL || req->actual == 0) {
+		ERROR(cdev,
+		      "%s FAILED: status=%d, buf=%p, actual=%d\n",
+		      __func__, req->status, req->buf, req->actual);
+		return;
+	}
+
+	spin_lock_irqsave(&hidg->read_spinlock, flags);
+
+	new_buf = krealloc(hidg->set_report_buf, req->actual, GFP_ATOMIC);
+	if (new_buf == NULL) {
+		spin_unlock_irqrestore(&hidg->read_spinlock, flags);
+		return;
+	}
+	hidg->set_report_buf = new_buf;
+
+	hidg->set_report_length = req->actual;
+	memcpy(hidg->set_report_buf, req->buf, req->actual);
+
+	spin_unlock_irqrestore(&hidg->read_spinlock, flags);
+
+	wake_up(&hidg->read_queue);
+}
+
 static int hidg_setup(struct usb_function *f,
 		const struct usb_ctrlrequest *ctrl)
 {
@@ -523,10 +664,22 @@ static int hidg_setup(struct usb_function *f,
 		goto respond;
 		break;
 
+	case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
+		  | HID_REQ_GET_IDLE):
+		VDBG(cdev, "get_idle\n");
+		length = min_t(unsigned int, length, 1);
+		((u8 *) req->buf)[0] = hidg->idle;
+		goto respond;
+		break;
+
 	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 		  | HID_REQ_SET_REPORT):
 		VDBG(cdev, "set_report | wLength=%d\n", ctrl->wLength);
-		goto stall;
+		if (hidg->use_out_ep)
+			goto stall;
+		req->complete = hidg_ssreport_complete;
+		req->context  = hidg;
+		goto respond;
 		break;
 
 	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
@@ -546,6 +699,14 @@ static int hidg_setup(struct usb_function *f,
 		goto stall;
 		break;
 
+	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
+		  | HID_REQ_SET_IDLE):
+		VDBG(cdev, "set_idle\n");
+		length = 0;
+		hidg->idle = value >> 8;
+		goto respond;
+		break;
+
 	case ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8
 		  | USB_REQ_GET_DESCRIPTOR):
 		switch (value >> 8) {
@@ -606,15 +767,18 @@ static void hidg_disable(struct usb_function *f)
 	unsigned long flags;
 
 	usb_ep_disable(hidg->in_ep);
-	usb_ep_disable(hidg->out_ep);
 
-	spin_lock_irqsave(&hidg->read_spinlock, flags);
-	list_for_each_entry_safe(list, next, &hidg->completed_out_req, list) {
-		free_ep_req(hidg->out_ep, list->req);
-		list_del(&list->list);
-		kfree(list);
+	if (hidg->out_ep) {
+		usb_ep_disable(hidg->out_ep);
+
+		spin_lock_irqsave(&hidg->read_spinlock, flags);
+		list_for_each_entry_safe(list, next, &hidg->completed_out_req, list) {
+			free_ep_req(hidg->out_ep, list->req);
+			list_del(&list->list);
+			kfree(list);
+		}
+		spin_unlock_irqrestore(&hidg->read_spinlock, flags);
 	}
-	spin_unlock_irqrestore(&hidg->read_spinlock, flags);
 
 	spin_lock_irqsave(&hidg->write_spinlock, flags);
 	if (!hidg->write_pending) {
@@ -660,8 +824,7 @@ static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 		}
 	}
 
-
-	if (hidg->out_ep != NULL) {
+	if (hidg->use_out_ep && hidg->out_ep != NULL) {
 		/* restart endpoint */
 		usb_ep_disable(hidg->out_ep);
 
@@ -686,7 +849,7 @@ static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 					hidg_alloc_ep_req(hidg->out_ep,
 							  hidg->report_length);
 			if (req) {
-				req->complete = hidg_set_report_complete;
+				req->complete = hidg_intout_complete;
 				req->context  = hidg;
 				status = usb_ep_queue(hidg->out_ep, req,
 						      GFP_ATOMIC);
@@ -712,7 +875,8 @@ static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 	}
 	return 0;
 disable_out_ep:
-	usb_ep_disable(hidg->out_ep);
+	if (hidg->out_ep)
+		usb_ep_disable(hidg->out_ep);
 free_req_in:
 	if (req_in)
 		free_ep_req(hidg->in_ep, req_in);
@@ -764,15 +928,23 @@ static int hidg_bind(struct usb_configuration *c, struct usb_function *f)
 		goto fail;
 	hidg->in_ep = ep;
 
-	ep = usb_ep_autoconfig(c->cdev->gadget, &hidg_fs_out_ep_desc);
-	if (!ep)
-		goto fail;
-	hidg->out_ep = ep;
+	hidg->out_ep = NULL;
+	if (hidg->use_out_ep) {
+		ep = usb_ep_autoconfig(c->cdev->gadget, &hidg_fs_out_ep_desc);
+		if (!ep)
+			goto fail;
+		hidg->out_ep = ep;
+	}
+
+	/* used only if use_out_ep == 1 */
+	hidg->set_report_buf = NULL;
 
 	/* set descriptor dynamic values */
 	hidg_interface_desc.bInterfaceSubClass = hidg->bInterfaceSubClass;
 	hidg_interface_desc.bInterfaceProtocol = hidg->bInterfaceProtocol;
+	hidg_interface_desc.bNumEndpoints = hidg->use_out_ep ? 2 : 1;
 	hidg->protocol = HID_REPORT_PROTOCOL;
+	hidg->idle = 1;
 	hidg_ss_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 	hidg_ss_in_comp_desc.wBytesPerInterval =
 				cpu_to_le16(hidg->report_length);
@@ -801,9 +973,19 @@ static int hidg_bind(struct usb_configuration *c, struct usb_function *f)
 	hidg_ss_out_ep_desc.bEndpointAddress =
 		hidg_fs_out_ep_desc.bEndpointAddress;
 
-	status = usb_assign_descriptors(f, hidg_fs_descriptors,
-			hidg_hs_descriptors, hidg_ss_descriptors,
-			hidg_ss_descriptors);
+	if (hidg->use_out_ep)
+		status = usb_assign_descriptors(f,
+			hidg_fs_descriptors_intout,
+			hidg_hs_descriptors_intout,
+			hidg_ss_descriptors_intout,
+			hidg_ss_descriptors_intout);
+	else
+		status = usb_assign_descriptors(f,
+			hidg_fs_descriptors_ssreport,
+			hidg_hs_descriptors_ssreport,
+			hidg_ss_descriptors_ssreport,
+			hidg_ss_descriptors_ssreport);
+
 	if (status)
 		goto fail;
 
@@ -918,6 +1100,7 @@ CONFIGFS_ATTR(f_hid_opts_, name)
 
 F_HID_OPT(subclass, 8, 255);
 F_HID_OPT(protocol, 8, 255);
+F_HID_OPT(no_out_endpoint, 8, 1);
 F_HID_OPT(report_length, 16, 65535);
 
 static ssize_t f_hid_opts_report_desc_show(struct config_item *item, char *page)
@@ -977,6 +1160,7 @@ CONFIGFS_ATTR_RO(f_hid_opts_, dev);
 static struct configfs_attribute *hid_attrs[] = {
 	&f_hid_opts_attr_subclass,
 	&f_hid_opts_attr_protocol,
+	&f_hid_opts_attr_no_out_endpoint,
 	&f_hid_opts_attr_report_length,
 	&f_hid_opts_attr_report_desc,
 	&f_hid_opts_attr_dev,
@@ -1061,6 +1245,7 @@ static void hidg_free(struct usb_function *f)
 	hidg = func_to_hidg(f);
 	opts = container_of(f->fi, struct f_hid_opts, func_inst);
 	kfree(hidg->report_desc);
+	kfree(hidg->set_report_buf);
 	kfree(hidg);
 	mutex_lock(&opts->lock);
 	--opts->refcnt;
@@ -1107,6 +1292,7 @@ static struct usb_function *hidg_alloc(struct usb_function_instance *fi)
 			return ERR_PTR(-ENOMEM);
 		}
 	}
+	hidg->use_out_ep = !opts->no_out_endpoint;
 
 	mutex_unlock(&opts->lock);
 
diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c
index 4a4703634a2a..6ad669dde41c 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -6,36 +6,6 @@
  * Copyright (C) 2009 Samsung Electronics
  *                    Author: Michal Nazarewicz <mina86@mina86.com>
  * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions, and the following disclaimer,
- *    without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- *    to endorse or promote products derived from this software without
- *    specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation, either version 2 of that License or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /*
diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c
index 855127249f24..dc8f078f918c 100644
--- a/drivers/usb/gadget/function/f_ncm.c
+++ b/drivers/usb/gadget/function/f_ncm.c
@@ -72,9 +72,7 @@ struct f_ncm {
 	struct sk_buff			*skb_tx_data;
 	struct sk_buff			*skb_tx_ndp;
 	u16				ndp_dgram_count;
-	bool				timer_force_tx;
 	struct hrtimer			task_timer;
-	bool				timer_stopping;
 };
 
 static inline struct f_ncm *func_to_ncm(struct usb_function *f)
@@ -890,7 +888,6 @@ static int ncm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 
 		if (ncm->port.in_ep->enabled) {
 			DBG(cdev, "reset ncm\n");
-			ncm->timer_stopping = true;
 			ncm->netdev = NULL;
 			gether_disconnect(&ncm->port);
 			ncm_reset_values(ncm);
@@ -928,7 +925,6 @@ static int ncm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 			if (IS_ERR(net))
 				return PTR_ERR(net);
 			ncm->netdev = net;
-			ncm->timer_stopping = false;
 		}
 
 		spin_lock(&ncm->lock);
@@ -1017,22 +1013,20 @@ static struct sk_buff *ncm_wrap_ntb(struct gether *port,
 {
 	struct f_ncm	*ncm = func_to_ncm(&port->func);
 	struct sk_buff	*skb2 = NULL;
-	int		ncb_len = 0;
-	__le16		*ntb_data;
-	__le16		*ntb_ndp;
-	int		dgram_pad;
-
-	unsigned	max_size = ncm->port.fixed_in_len;
-	const struct ndp_parser_opts *opts = ncm->parser_opts;
-	const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment);
-	const int div = le16_to_cpu(ntb_parameters.wNdpInDivisor);
-	const int rem = le16_to_cpu(ntb_parameters.wNdpInPayloadRemainder);
-	const int dgram_idx_len = 2 * 2 * opts->dgram_item_len;
-
-	if (!skb && !ncm->skb_tx_data)
-		return NULL;
 
 	if (skb) {
+		int		ncb_len = 0;
+		__le16		*ntb_data;
+		__le16		*ntb_ndp;
+		int		dgram_pad;
+
+		unsigned	max_size = ncm->port.fixed_in_len;
+		const struct ndp_parser_opts *opts = ncm->parser_opts;
+		const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment);
+		const int div = le16_to_cpu(ntb_parameters.wNdpInDivisor);
+		const int rem = le16_to_cpu(ntb_parameters.wNdpInPayloadRemainder);
+		const int dgram_idx_len = 2 * 2 * opts->dgram_item_len;
+
 		/* Add the CRC if required up front */
 		if (ncm->is_crc) {
 			uint32_t	crc;
@@ -1126,8 +1120,11 @@ static struct sk_buff *ncm_wrap_ntb(struct gether *port,
 		dev_consume_skb_any(skb);
 		skb = NULL;
 
-	} else if (ncm->skb_tx_data && ncm->timer_force_tx) {
-		/* If the tx was requested because of a timeout then send */
+	} else if (ncm->skb_tx_data) {
+		/* If we get here ncm_wrap_ntb() was called with NULL skb,
+		 * because eth_start_xmit() was called with NULL skb by
+		 * ncm_tx_timeout() - hence, this is our signal to flush/send.
+		 */
 		skb2 = package_for_tx(ncm);
 		if (!skb2)
 			goto err;
@@ -1155,20 +1152,18 @@ err:
 static enum hrtimer_restart ncm_tx_timeout(struct hrtimer *data)
 {
 	struct f_ncm *ncm = container_of(data, struct f_ncm, task_timer);
+	struct net_device *netdev = READ_ONCE(ncm->netdev);
 
-	/* Only send if data is available. */
-	if (!ncm->timer_stopping && ncm->skb_tx_data) {
-		ncm->timer_force_tx = true;
-
+	if (netdev) {
 		/* XXX This allowance of a NULL skb argument to ndo_start_xmit
 		 * XXX is not sane.  The gadget layer should be redesigned so
 		 * XXX that the dev->wrap() invocations to build SKBs is transparent
 		 * XXX and performed in some way outside of the ndo_start_xmit
 		 * XXX interface.
+		 *
+		 * This will call directly into u_ether's eth_start_xmit()
 		 */
-		ncm->netdev->netdev_ops->ndo_start_xmit(NULL, ncm->netdev);
-
-		ncm->timer_force_tx = false;
+		netdev->netdev_ops->ndo_start_xmit(NULL, netdev);
 	}
 	return HRTIMER_NORESTART;
 }
@@ -1357,7 +1352,6 @@ static void ncm_disable(struct usb_function *f)
 	DBG(cdev, "ncm deactivated\n");
 
 	if (ncm->port.in_ep->enabled) {
-		ncm->timer_stopping = true;
 		ncm->netdev = NULL;
 		gether_disconnect(&ncm->port);
 	}
diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c
index d04707580068..5b3502df4e13 100644
--- a/drivers/usb/gadget/function/f_uac1.c
+++ b/drivers/usb/gadget/function/f_uac1.c
@@ -22,13 +22,26 @@
 /* UAC1 spec: 3.7.2.3 Audio Channel Cluster Format */
 #define UAC1_CHANNEL_MASK 0x0FFF
 
+#define USB_OUT_FU_ID	(out_feature_unit_desc->bUnitID)
+#define USB_IN_FU_ID	(in_feature_unit_desc->bUnitID)
+
 #define EPIN_EN(_opts) ((_opts)->p_chmask != 0)
 #define EPOUT_EN(_opts) ((_opts)->c_chmask != 0)
+#define FUIN_EN(_opts) ((_opts)->p_mute_present \
+			|| (_opts)->p_volume_present)
+#define FUOUT_EN(_opts) ((_opts)->c_mute_present \
+			|| (_opts)->c_volume_present)
 
 struct f_uac1 {
 	struct g_audio g_audio;
 	u8 ac_intf, as_in_intf, as_out_intf;
 	u8 ac_alt, as_in_alt, as_out_alt;	/* needed for get_alt() */
+
+	struct usb_ctrlrequest setup_cr;	/* will be used in data stage */
+
+	/* Interrupt IN endpoint of AC interface */
+	struct usb_ep	*int_ep;
+	atomic_t	int_count;
 };
 
 static inline struct f_uac1 *func_to_uac1(struct usb_function *f)
@@ -58,7 +71,7 @@ static inline struct f_uac1_opts *g_audio_to_uac1_opts(struct g_audio *audio)
 static struct usb_interface_descriptor ac_interface_desc = {
 	.bLength =		USB_DT_INTERFACE_SIZE,
 	.bDescriptorType =	USB_DT_INTERFACE,
-	.bNumEndpoints =	0,
+	/* .bNumEndpoints =	DYNAMIC */
 	.bInterfaceClass =	USB_CLASS_AUDIO,
 	.bInterfaceSubClass =	USB_SUBCLASS_AUDIOCONTROL,
 };
@@ -106,6 +119,19 @@ static struct uac1_output_terminal_descriptor usb_in_ot_desc = {
 	/* .bSourceID =		DYNAMIC */
 };
 
+static struct uac_feature_unit_descriptor *in_feature_unit_desc;
+static struct uac_feature_unit_descriptor *out_feature_unit_desc;
+
+/* AC IN Interrupt Endpoint */
+static struct usb_endpoint_descriptor ac_int_ep_desc = {
+	.bLength = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType = USB_DT_ENDPOINT,
+	.bEndpointAddress = USB_DIR_IN,
+	.bmAttributes = USB_ENDPOINT_XFER_INT,
+	.wMaxPacketSize = cpu_to_le16(2),
+	.bInterval = 4,
+};
+
 /* B.4.1  Standard AS Interface Descriptor */
 static struct usb_interface_descriptor as_out_interface_alt_0_desc = {
 	.bLength =		USB_DT_INTERFACE_SIZE,
@@ -232,8 +258,13 @@ static struct usb_descriptor_header *f_audio_desc[] = {
 
 	(struct usb_descriptor_header *)&usb_out_it_desc,
 	(struct usb_descriptor_header *)&io_out_ot_desc,
+	(struct usb_descriptor_header *)&out_feature_unit_desc,
+
 	(struct usb_descriptor_header *)&io_in_it_desc,
 	(struct usb_descriptor_header *)&usb_in_ot_desc,
+	(struct usb_descriptor_header *)&in_feature_unit_desc,
+
+	(struct usb_descriptor_header *)&ac_int_ep_desc,
 
 	(struct usb_descriptor_header *)&as_out_interface_alt_0_desc,
 	(struct usb_descriptor_header *)&as_out_interface_alt_1_desc,
@@ -263,6 +294,8 @@ enum {
 	STR_IO_IN_IT,
 	STR_IO_IN_IT_CH_NAMES,
 	STR_USB_IN_OT,
+	STR_FU_IN,
+	STR_FU_OUT,
 	STR_AS_OUT_IF_ALT0,
 	STR_AS_OUT_IF_ALT1,
 	STR_AS_IN_IF_ALT0,
@@ -277,6 +310,8 @@ static struct usb_string strings_uac1[] = {
 	[STR_IO_IN_IT].s = "Capture Input terminal",
 	[STR_IO_IN_IT_CH_NAMES].s = "Capture Channels",
 	[STR_USB_IN_OT].s = "Capture Output terminal",
+	[STR_FU_IN].s = "Capture Volume",
+	[STR_FU_OUT].s = "Playback Volume",
 	[STR_AS_OUT_IF_ALT0].s = "Playback Inactive",
 	[STR_AS_OUT_IF_ALT1].s = "Playback Active",
 	[STR_AS_IN_IF_ALT0].s = "Capture Inactive",
@@ -298,6 +333,376 @@ static struct usb_gadget_strings *uac1_strings[] = {
  * This function is an ALSA sound card following USB Audio Class Spec 1.0.
  */
 
+static void audio_notify_complete(struct usb_ep *_ep, struct usb_request *req)
+{
+	struct g_audio *audio = req->context;
+	struct f_uac1 *uac1 = func_to_uac1(&audio->func);
+
+	atomic_dec(&uac1->int_count);
+	kfree(req->buf);
+	usb_ep_free_request(_ep, req);
+}
+
+static int audio_notify(struct g_audio *audio, int unit_id, int cs)
+{
+	struct f_uac1 *uac1 = func_to_uac1(&audio->func);
+	struct usb_request *req;
+	struct uac1_status_word *msg;
+	int ret;
+
+	if (!uac1->int_ep->enabled)
+		return 0;
+
+	if (atomic_inc_return(&uac1->int_count) > UAC1_DEF_INT_REQ_NUM) {
+		atomic_dec(&uac1->int_count);
+		return 0;
+	}
+
+	req = usb_ep_alloc_request(uac1->int_ep, GFP_ATOMIC);
+	if (req == NULL) {
+		ret = -ENOMEM;
+		goto err_dec_int_count;
+	}
+
+	msg = kmalloc(sizeof(*msg), GFP_ATOMIC);
+	if (msg == NULL) {
+		ret = -ENOMEM;
+		goto err_free_request;
+	}
+
+	msg->bStatusType = UAC1_STATUS_TYPE_IRQ_PENDING
+				| UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF;
+	msg->bOriginator = unit_id;
+
+	req->length = sizeof(*msg);
+	req->buf = msg;
+	req->context = audio;
+	req->complete = audio_notify_complete;
+
+	ret = usb_ep_queue(uac1->int_ep, req, GFP_ATOMIC);
+
+	if (ret)
+		goto err_free_msg;
+
+	return 0;
+
+err_free_msg:
+	kfree(msg);
+err_free_request:
+	usb_ep_free_request(uac1->int_ep, req);
+err_dec_int_count:
+	atomic_dec(&uac1->int_count);
+
+	return ret;
+}
+
+static int
+in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
+{
+	struct usb_request *req = fn->config->cdev->req;
+	struct g_audio *audio = func_to_g_audio(fn);
+	struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
+	u16 w_length = le16_to_cpu(cr->wLength);
+	u16 w_index = le16_to_cpu(cr->wIndex);
+	u16 w_value = le16_to_cpu(cr->wValue);
+	u8 entity_id = (w_index >> 8) & 0xff;
+	u8 control_selector = w_value >> 8;
+	int value = -EOPNOTSUPP;
+
+	if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+			(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+		unsigned int is_playback = 0;
+
+		if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
+			is_playback = 1;
+
+		if (control_selector == UAC_FU_MUTE) {
+			unsigned int mute;
+
+			u_audio_get_mute(audio, is_playback, &mute);
+
+			*(u8 *)req->buf = mute;
+			value = min_t(unsigned int, w_length, 1);
+		} else if (control_selector == UAC_FU_VOLUME) {
+			__le16 c;
+			s16 volume;
+
+			u_audio_get_volume(audio, is_playback, &volume);
+
+			c = cpu_to_le16(volume);
+
+			value = min_t(unsigned int, w_length, sizeof(c));
+			memcpy(req->buf, &c, value);
+		} else {
+			dev_err(&audio->gadget->dev,
+				"%s:%d control_selector=%d TODO!\n",
+				__func__, __LINE__, control_selector);
+		}
+	} else {
+		dev_err(&audio->gadget->dev,
+			"%s:%d entity_id=%d control_selector=%d TODO!\n",
+			__func__, __LINE__, entity_id, control_selector);
+	}
+
+	return value;
+}
+
+static int
+in_rq_min(struct usb_function *fn, const struct usb_ctrlrequest *cr)
+{
+	struct usb_request *req = fn->config->cdev->req;
+	struct g_audio *audio = func_to_g_audio(fn);
+	struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
+	u16 w_length = le16_to_cpu(cr->wLength);
+	u16 w_index = le16_to_cpu(cr->wIndex);
+	u16 w_value = le16_to_cpu(cr->wValue);
+	u8 entity_id = (w_index >> 8) & 0xff;
+	u8 control_selector = w_value >> 8;
+	int value = -EOPNOTSUPP;
+
+	if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+			(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+		unsigned int is_playback = 0;
+
+		if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
+			is_playback = 1;
+
+		if (control_selector == UAC_FU_VOLUME) {
+			__le16 r;
+			s16 min_db;
+
+			if (is_playback)
+				min_db = opts->p_volume_min;
+			else
+				min_db = opts->c_volume_min;
+
+			r = cpu_to_le16(min_db);
+
+			value = min_t(unsigned int, w_length, sizeof(r));
+			memcpy(req->buf, &r, value);
+		} else {
+			dev_err(&audio->gadget->dev,
+				"%s:%d control_selector=%d TODO!\n",
+				__func__, __LINE__, control_selector);
+		}
+	} else {
+		dev_err(&audio->gadget->dev,
+			"%s:%d entity_id=%d control_selector=%d TODO!\n",
+			__func__, __LINE__, entity_id, control_selector);
+	}
+
+	return value;
+}
+
+static int
+in_rq_max(struct usb_function *fn, const struct usb_ctrlrequest *cr)
+{
+	struct usb_request *req = fn->config->cdev->req;
+	struct g_audio *audio = func_to_g_audio(fn);
+	struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
+	u16 w_length = le16_to_cpu(cr->wLength);
+	u16 w_index = le16_to_cpu(cr->wIndex);
+	u16 w_value = le16_to_cpu(cr->wValue);
+	u8 entity_id = (w_index >> 8) & 0xff;
+	u8 control_selector = w_value >> 8;
+	int value = -EOPNOTSUPP;
+
+	if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+			(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+		unsigned int is_playback = 0;
+
+		if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
+			is_playback = 1;
+
+		if (control_selector == UAC_FU_VOLUME) {
+			__le16 r;
+			s16 max_db;
+
+			if (is_playback)
+				max_db = opts->p_volume_max;
+			else
+				max_db = opts->c_volume_max;
+
+			r = cpu_to_le16(max_db);
+
+			value = min_t(unsigned int, w_length, sizeof(r));
+			memcpy(req->buf, &r, value);
+		} else {
+			dev_err(&audio->gadget->dev,
+				"%s:%d control_selector=%d TODO!\n",
+				__func__, __LINE__, control_selector);
+		}
+	} else {
+		dev_err(&audio->gadget->dev,
+			"%s:%d entity_id=%d control_selector=%d TODO!\n",
+			__func__, __LINE__, entity_id, control_selector);
+	}
+
+	return value;
+}
+
+static int
+in_rq_res(struct usb_function *fn, const struct usb_ctrlrequest *cr)
+{
+	struct usb_request *req = fn->config->cdev->req;
+	struct g_audio *audio = func_to_g_audio(fn);
+	struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
+	u16 w_length = le16_to_cpu(cr->wLength);
+	u16 w_index = le16_to_cpu(cr->wIndex);
+	u16 w_value = le16_to_cpu(cr->wValue);
+	u8 entity_id = (w_index >> 8) & 0xff;
+	u8 control_selector = w_value >> 8;
+	int value = -EOPNOTSUPP;
+
+	if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+			(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+		unsigned int is_playback = 0;
+
+		if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
+			is_playback = 1;
+
+		if (control_selector == UAC_FU_VOLUME) {
+			__le16 r;
+			s16 res_db;
+
+			if (is_playback)
+				res_db = opts->p_volume_res;
+			else
+				res_db = opts->c_volume_res;
+
+			r = cpu_to_le16(res_db);
+
+			value = min_t(unsigned int, w_length, sizeof(r));
+			memcpy(req->buf, &r, value);
+		} else {
+			dev_err(&audio->gadget->dev,
+				"%s:%d control_selector=%d TODO!\n",
+				__func__, __LINE__, control_selector);
+		}
+	} else {
+		dev_err(&audio->gadget->dev,
+			"%s:%d entity_id=%d control_selector=%d TODO!\n",
+			__func__, __LINE__, entity_id, control_selector);
+	}
+
+	return value;
+}
+
+static void
+out_rq_cur_complete(struct usb_ep *ep, struct usb_request *req)
+{
+	struct g_audio *audio = req->context;
+	struct usb_composite_dev *cdev = audio->func.config->cdev;
+	struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
+	struct f_uac1 *uac1 = func_to_uac1(&audio->func);
+	struct usb_ctrlrequest *cr = &uac1->setup_cr;
+	u16 w_index = le16_to_cpu(cr->wIndex);
+	u16 w_value = le16_to_cpu(cr->wValue);
+	u8 entity_id = (w_index >> 8) & 0xff;
+	u8 control_selector = w_value >> 8;
+
+	if (req->status != 0) {
+		dev_dbg(&cdev->gadget->dev, "completion err %d\n", req->status);
+		return;
+	}
+
+	if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+			(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+		unsigned int is_playback = 0;
+
+		if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
+			is_playback = 1;
+
+		if (control_selector == UAC_FU_MUTE) {
+			u8 mute = *(u8 *)req->buf;
+
+			u_audio_set_mute(audio, is_playback, mute);
+
+			return;
+		} else if (control_selector == UAC_FU_VOLUME) {
+			__le16 *c = req->buf;
+			s16 volume;
+
+			volume = le16_to_cpu(*c);
+			u_audio_set_volume(audio, is_playback, volume);
+
+			return;
+		} else {
+			dev_err(&audio->gadget->dev,
+				"%s:%d control_selector=%d TODO!\n",
+				__func__, __LINE__, control_selector);
+			usb_ep_set_halt(ep);
+		}
+	} else {
+		dev_err(&audio->gadget->dev,
+			"%s:%d entity_id=%d control_selector=%d TODO!\n",
+			__func__, __LINE__, entity_id, control_selector);
+		usb_ep_set_halt(ep);
+
+	}
+}
+
+static int
+out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
+{
+	struct usb_request *req = fn->config->cdev->req;
+	struct g_audio *audio = func_to_g_audio(fn);
+	struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
+	struct f_uac1 *uac1 = func_to_uac1(&audio->func);
+	u16 w_length = le16_to_cpu(cr->wLength);
+	u16 w_index = le16_to_cpu(cr->wIndex);
+	u16 w_value = le16_to_cpu(cr->wValue);
+	u8 entity_id = (w_index >> 8) & 0xff;
+	u8 control_selector = w_value >> 8;
+
+	if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+			(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+		memcpy(&uac1->setup_cr, cr, sizeof(*cr));
+		req->context = audio;
+		req->complete = out_rq_cur_complete;
+
+		return w_length;
+	} else {
+		dev_err(&audio->gadget->dev,
+			"%s:%d entity_id=%d control_selector=%d TODO!\n",
+			__func__, __LINE__, entity_id, control_selector);
+	}
+	return -EOPNOTSUPP;
+}
+
+static int ac_rq_in(struct usb_function *f,
+		const struct usb_ctrlrequest *ctrl)
+{
+	struct usb_composite_dev *cdev = f->config->cdev;
+	int value = -EOPNOTSUPP;
+	u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
+	u16 len = le16_to_cpu(ctrl->wLength);
+	u16 w_value = le16_to_cpu(ctrl->wValue);
+
+	DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
+			ctrl->bRequest, w_value, len, ep);
+
+	switch (ctrl->bRequest) {
+	case UAC_GET_CUR:
+		return in_rq_cur(f, ctrl);
+	case UAC_GET_MIN:
+		return in_rq_min(f, ctrl);
+	case UAC_GET_MAX:
+		return in_rq_max(f, ctrl);
+	case UAC_GET_RES:
+		return in_rq_res(f, ctrl);
+	case UAC_GET_MEM:
+		break;
+	case UAC_GET_STAT:
+		value = len;
+		break;
+	default:
+		break;
+	}
+
+	return value;
+}
+
 static int audio_set_endpoint_req(struct usb_function *f,
 		const struct usb_ctrlrequest *ctrl)
 {
@@ -383,7 +788,13 @@ f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 	case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
 		value = audio_get_endpoint_req(f, ctrl);
 		break;
-
+	case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
+		if (ctrl->bRequest == UAC_SET_CUR)
+			value = out_rq_cur(f, ctrl);
+		break;
+	case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
+		value = ac_rq_in(f, ctrl);
+		break;
 	default:
 		ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
 			ctrl->bRequestType, ctrl->bRequest,
@@ -411,6 +822,7 @@ static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 	struct usb_composite_dev *cdev = f->config->cdev;
 	struct usb_gadget *gadget = cdev->gadget;
 	struct device *dev = &gadget->dev;
+	struct g_audio *audio = func_to_g_audio(f);
 	struct f_uac1 *uac1 = func_to_uac1(f);
 	int ret = 0;
 
@@ -426,6 +838,14 @@ static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 			dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
 			return -EINVAL;
 		}
+
+		/* restart interrupt endpoint */
+		if (uac1->int_ep) {
+			usb_ep_disable(uac1->int_ep);
+			config_ep_by_speed(gadget, &audio->func, uac1->int_ep);
+			usb_ep_enable(uac1->int_ep);
+		}
+
 		return 0;
 	}
 
@@ -481,10 +901,33 @@ static void f_audio_disable(struct usb_function *f)
 
 	u_audio_stop_playback(&uac1->g_audio);
 	u_audio_stop_capture(&uac1->g_audio);
+	if (uac1->int_ep)
+		usb_ep_disable(uac1->int_ep);
 }
 
 /*-------------------------------------------------------------------------*/
+static struct uac_feature_unit_descriptor *build_fu_desc(int chmask)
+{
+	struct uac_feature_unit_descriptor *fu_desc;
+	int channels = num_channels(chmask);
+	int fu_desc_size = UAC_DT_FEATURE_UNIT_SIZE(channels);
+
+	fu_desc = kzalloc(fu_desc_size, GFP_KERNEL);
+	if (!fu_desc)
+		return NULL;
+
+	fu_desc->bLength = fu_desc_size;
+	fu_desc->bDescriptorType = USB_DT_CS_INTERFACE;
+
+	fu_desc->bDescriptorSubtype = UAC_FEATURE_UNIT;
+	fu_desc->bControlSize  = 2;
 
+	/* bUnitID, bSourceID and bmaControls will be defined later */
+
+	return fu_desc;
+}
+
+/* B.3.2  Class-Specific AC Interface Descriptor */
 static struct
 uac1_ac_header_descriptor *build_ac_header_desc(struct f_uac1_opts *opts)
 {
@@ -530,9 +973,23 @@ static void setup_descriptor(struct f_uac1_opts *opts)
 		io_out_ot_desc.bTerminalID = i++;
 	if (EPIN_EN(opts))
 		usb_in_ot_desc.bTerminalID = i++;
-
-	usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID;
-	io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID;
+	if (FUOUT_EN(opts))
+		out_feature_unit_desc->bUnitID = i++;
+	if (FUIN_EN(opts))
+		in_feature_unit_desc->bUnitID = i++;
+
+	if (FUIN_EN(opts)) {
+		usb_in_ot_desc.bSourceID = in_feature_unit_desc->bUnitID;
+		in_feature_unit_desc->bSourceID = io_in_it_desc.bTerminalID;
+	} else {
+		usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID;
+	}
+	if (FUOUT_EN(opts)) {
+		io_out_ot_desc.bSourceID = out_feature_unit_desc->bUnitID;
+		out_feature_unit_desc->bSourceID = usb_out_it_desc.bTerminalID;
+	} else {
+		io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID;
+	}
 
 	as_out_header_desc.bTerminalLink = usb_out_it_desc.bTerminalID;
 	as_in_header_desc.bTerminalLink = usb_in_ot_desc.bTerminalID;
@@ -544,6 +1001,8 @@ static void setup_descriptor(struct f_uac1_opts *opts)
 
 		len += sizeof(usb_in_ot_desc);
 		len += sizeof(io_in_it_desc);
+		if (FUIN_EN(opts))
+			len += in_feature_unit_desc->bLength;
 		ac_header_desc->wTotalLength = cpu_to_le16(len);
 	}
 	if (EPOUT_EN(opts)) {
@@ -551,6 +1010,8 @@ static void setup_descriptor(struct f_uac1_opts *opts)
 
 		len += sizeof(usb_out_it_desc);
 		len += sizeof(io_out_ot_desc);
+		if (FUOUT_EN(opts))
+			len += out_feature_unit_desc->bLength;
 		ac_header_desc->wTotalLength = cpu_to_le16(len);
 	}
 
@@ -561,13 +1022,20 @@ static void setup_descriptor(struct f_uac1_opts *opts)
 	if (EPOUT_EN(opts)) {
 		f_audio_desc[i++] = USBDHDR(&usb_out_it_desc);
 		f_audio_desc[i++] = USBDHDR(&io_out_ot_desc);
+		if (FUOUT_EN(opts))
+			f_audio_desc[i++] = USBDHDR(out_feature_unit_desc);
 	}
 
 	if (EPIN_EN(opts)) {
 		f_audio_desc[i++] = USBDHDR(&io_in_it_desc);
 		f_audio_desc[i++] = USBDHDR(&usb_in_ot_desc);
+		if (FUIN_EN(opts))
+			f_audio_desc[i++] = USBDHDR(in_feature_unit_desc);
 	}
 
+	if (FUOUT_EN(opts) || FUIN_EN(opts))
+		f_audio_desc[i++] = USBDHDR(&ac_int_ep_desc);
+
 	if (EPOUT_EN(opts)) {
 		f_audio_desc[i++] = USBDHDR(&as_out_interface_alt_0_desc);
 		f_audio_desc[i++] = USBDHDR(&as_out_interface_alt_1_desc);
@@ -614,6 +1082,28 @@ static int f_audio_validate_opts(struct g_audio *audio, struct device *dev)
 		return -EINVAL;
 	}
 
+	if (opts->p_volume_max <= opts->p_volume_min) {
+		dev_err(dev, "Error: incorrect playback volume max/min\n");
+		return -EINVAL;
+	} else if (opts->c_volume_max <= opts->c_volume_min) {
+		dev_err(dev, "Error: incorrect capture volume max/min\n");
+		return -EINVAL;
+	} else if (opts->p_volume_res <= 0) {
+		dev_err(dev, "Error: negative/zero playback volume resolution\n");
+		return -EINVAL;
+	} else if (opts->c_volume_res <= 0) {
+		dev_err(dev, "Error: negative/zero capture volume resolution\n");
+		return -EINVAL;
+	}
+
+	if ((opts->p_volume_max - opts->p_volume_min) % opts->p_volume_res) {
+		dev_err(dev, "Error: incorrect playback volume resolution\n");
+		return -EINVAL;
+	} else if ((opts->c_volume_max - opts->c_volume_min) % opts->c_volume_res) {
+		dev_err(dev, "Error: incorrect capture volume resolution\n");
+		return -EINVAL;
+	}
+
 	return 0;
 }
 
@@ -647,6 +1137,21 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 	if (!ac_header_desc)
 		return -ENOMEM;
 
+	if (FUOUT_EN(audio_opts)) {
+		out_feature_unit_desc = build_fu_desc(audio_opts->c_chmask);
+		if (!out_feature_unit_desc) {
+			status = -ENOMEM;
+			goto fail;
+		}
+	}
+	if (FUIN_EN(audio_opts)) {
+		in_feature_unit_desc = build_fu_desc(audio_opts->p_chmask);
+		if (!in_feature_unit_desc) {
+			status = -ENOMEM;
+			goto err_free_fu;
+		}
+	}
+
 	ac_interface_desc.iInterface = us[STR_AC_IF].id;
 	usb_out_it_desc.iTerminal = us[STR_USB_OUT_IT].id;
 	usb_out_it_desc.iChannelNames = us[STR_USB_OUT_IT_CH_NAMES].id;
@@ -659,6 +1164,21 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 	as_in_interface_alt_0_desc.iInterface = us[STR_AS_IN_IF_ALT0].id;
 	as_in_interface_alt_1_desc.iInterface = us[STR_AS_IN_IF_ALT1].id;
 
+	if (FUOUT_EN(audio_opts)) {
+		u8 *i_feature;
+
+		i_feature = (u8 *)out_feature_unit_desc +
+					out_feature_unit_desc->bLength - 1;
+		*i_feature = us[STR_FU_OUT].id;
+	}
+	if (FUIN_EN(audio_opts)) {
+		u8 *i_feature;
+
+		i_feature = (u8 *)in_feature_unit_desc +
+					in_feature_unit_desc->bLength - 1;
+		*i_feature = us[STR_FU_IN].id;
+	}
+
 	/* Set channel numbers */
 	usb_out_it_desc.bNrChannels = num_channels(audio_opts->c_chmask);
 	usb_out_it_desc.wChannelConfig = cpu_to_le16(audio_opts->c_chmask);
@@ -671,6 +1191,27 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 	as_in_type_i_desc.bSubframeSize = audio_opts->p_ssize;
 	as_in_type_i_desc.bBitResolution = audio_opts->p_ssize * 8;
 
+	if (FUOUT_EN(audio_opts)) {
+		__le16 *bma = (__le16 *)&out_feature_unit_desc->bmaControls[0];
+		u32 control = 0;
+
+		if (audio_opts->c_mute_present)
+			control |= UAC_FU_MUTE;
+		if (audio_opts->c_volume_present)
+			control |= UAC_FU_VOLUME;
+		*bma = cpu_to_le16(control);
+	}
+	if (FUIN_EN(audio_opts)) {
+		__le16 *bma = (__le16 *)&in_feature_unit_desc->bmaControls[0];
+		u32 control = 0;
+
+		if (audio_opts->p_mute_present)
+			control |= UAC_FU_MUTE;
+		if (audio_opts->p_volume_present)
+			control |= UAC_FU_VOLUME;
+		*bma = cpu_to_le16(control);
+	}
+
 	/* Set sample rates */
 	rate = audio_opts->c_srate;
 	sam_freq = as_out_type_i_desc.tSamFreq[0];
@@ -682,7 +1223,7 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 	/* allocate instance-specific interface IDs, and patch descriptors */
 	status = usb_interface_id(c, f);
 	if (status < 0)
-		goto fail;
+		goto err_free_fu;
 	ac_interface_desc.bInterfaceNumber = status;
 	uac1->ac_intf = status;
 	uac1->ac_alt = 0;
@@ -692,7 +1233,7 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 	if (EPOUT_EN(audio_opts)) {
 		status = usb_interface_id(c, f);
 		if (status < 0)
-			goto fail;
+			goto err_free_fu;
 		as_out_interface_alt_0_desc.bInterfaceNumber = status;
 		as_out_interface_alt_1_desc.bInterfaceNumber = status;
 		ac_header_desc->baInterfaceNr[ba_iface_id++] = status;
@@ -703,7 +1244,7 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 	if (EPIN_EN(audio_opts)) {
 		status = usb_interface_id(c, f);
 		if (status < 0)
-			goto fail;
+			goto err_free_fu;
 		as_in_interface_alt_0_desc.bInterfaceNumber = status;
 		as_in_interface_alt_1_desc.bInterfaceNumber = status;
 		ac_header_desc->baInterfaceNr[ba_iface_id++] = status;
@@ -715,11 +1256,24 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 
 	status = -ENODEV;
 
+	ac_interface_desc.bNumEndpoints = 0;
+
+	/* allocate AC interrupt endpoint */
+	if (FUOUT_EN(audio_opts) || FUIN_EN(audio_opts)) {
+		ep = usb_ep_autoconfig(cdev->gadget, &ac_int_ep_desc);
+		if (!ep)
+			goto err_free_fu;
+		uac1->int_ep = ep;
+		uac1->int_ep->desc = &ac_int_ep_desc;
+
+		ac_interface_desc.bNumEndpoints = 1;
+	}
+
 	/* allocate instance-specific endpoints */
 	if (EPOUT_EN(audio_opts)) {
 		ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc);
 		if (!ep)
-			goto fail;
+			goto err_free_fu;
 		audio->out_ep = ep;
 		audio->out_ep->desc = &as_out_ep_desc;
 	}
@@ -727,7 +1281,7 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 	if (EPIN_EN(audio_opts)) {
 		ep = usb_ep_autoconfig(cdev->gadget, &as_in_ep_desc);
 		if (!ep)
-			goto fail;
+			goto err_free_fu;
 		audio->in_ep = ep;
 		audio->in_ep->desc = &as_in_ep_desc;
 	}
@@ -738,17 +1292,37 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 	status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL,
 					NULL);
 	if (status)
-		goto fail;
+		goto err_free_fu;
 
 	audio->out_ep_maxpsize = le16_to_cpu(as_out_ep_desc.wMaxPacketSize);
 	audio->in_ep_maxpsize = le16_to_cpu(as_in_ep_desc.wMaxPacketSize);
 	audio->params.c_chmask = audio_opts->c_chmask;
 	audio->params.c_srate = audio_opts->c_srate;
 	audio->params.c_ssize = audio_opts->c_ssize;
+	if (FUIN_EN(audio_opts)) {
+		audio->params.p_fu.id = USB_IN_FU_ID;
+		audio->params.p_fu.mute_present = audio_opts->p_mute_present;
+		audio->params.p_fu.volume_present =
+				audio_opts->p_volume_present;
+		audio->params.p_fu.volume_min = audio_opts->p_volume_min;
+		audio->params.p_fu.volume_max = audio_opts->p_volume_max;
+		audio->params.p_fu.volume_res = audio_opts->p_volume_res;
+	}
 	audio->params.p_chmask = audio_opts->p_chmask;
 	audio->params.p_srate = audio_opts->p_srate;
 	audio->params.p_ssize = audio_opts->p_ssize;
+	if (FUOUT_EN(audio_opts)) {
+		audio->params.c_fu.id = USB_OUT_FU_ID;
+		audio->params.c_fu.mute_present = audio_opts->c_mute_present;
+		audio->params.c_fu.volume_present =
+				audio_opts->c_volume_present;
+		audio->params.c_fu.volume_min = audio_opts->c_volume_min;
+		audio->params.c_fu.volume_max = audio_opts->c_volume_max;
+		audio->params.c_fu.volume_res = audio_opts->c_volume_res;
+	}
 	audio->params.req_number = audio_opts->req_number;
+	if (FUOUT_EN(audio_opts) || FUIN_EN(audio_opts))
+		audio->notify = audio_notify;
 
 	status = g_audio_setup(audio, "UAC1_PCM", "UAC1_Gadget");
 	if (status)
@@ -758,6 +1332,11 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 
 err_card_register:
 	usb_free_all_descriptors(f);
+err_free_fu:
+	kfree(out_feature_unit_desc);
+	out_feature_unit_desc = NULL;
+	kfree(in_feature_unit_desc);
+	in_feature_unit_desc = NULL;
 fail:
 	kfree(ac_header_desc);
 	ac_header_desc = NULL;
@@ -783,7 +1362,15 @@ static struct configfs_item_operations f_uac1_item_ops = {
 	.release	= f_uac1_attr_release,
 };
 
-#define UAC1_ATTRIBUTE(name)						\
+#define uac1_kstrtou32			kstrtou32
+#define uac1_kstrtos16			kstrtos16
+#define uac1_kstrtobool(s, base, res)	kstrtobool((s), (res))
+
+static const char *u32_fmt = "%u\n";
+static const char *s16_fmt = "%hd\n";
+static const char *bool_fmt = "%u\n";
+
+#define UAC1_ATTRIBUTE(type, name)					\
 static ssize_t f_uac1_opts_##name##_show(				\
 					  struct config_item *item,	\
 					  char *page)			\
@@ -792,7 +1379,7 @@ static ssize_t f_uac1_opts_##name##_show(				\
 	int result;							\
 									\
 	mutex_lock(&opts->lock);					\
-	result = sprintf(page, "%u\n", opts->name);			\
+	result = sprintf(page, type##_fmt, opts->name);			\
 	mutex_unlock(&opts->lock);					\
 									\
 	return result;							\
@@ -804,7 +1391,7 @@ static ssize_t f_uac1_opts_##name##_store(				\
 {									\
 	struct f_uac1_opts *opts = to_f_uac1_opts(item);		\
 	int ret;							\
-	u32 num;							\
+	type num;							\
 									\
 	mutex_lock(&opts->lock);					\
 	if (opts->refcnt) {						\
@@ -812,7 +1399,7 @@ static ssize_t f_uac1_opts_##name##_store(				\
 		goto end;						\
 	}								\
 									\
-	ret = kstrtou32(page, 0, &num);					\
+	ret = uac1_kstrto##type(page, 0, &num);				\
 	if (ret)							\
 		goto end;						\
 									\
@@ -826,13 +1413,25 @@ end:									\
 									\
 CONFIGFS_ATTR(f_uac1_opts_, name)
 
-UAC1_ATTRIBUTE(c_chmask);
-UAC1_ATTRIBUTE(c_srate);
-UAC1_ATTRIBUTE(c_ssize);
-UAC1_ATTRIBUTE(p_chmask);
-UAC1_ATTRIBUTE(p_srate);
-UAC1_ATTRIBUTE(p_ssize);
-UAC1_ATTRIBUTE(req_number);
+UAC1_ATTRIBUTE(u32, c_chmask);
+UAC1_ATTRIBUTE(u32, c_srate);
+UAC1_ATTRIBUTE(u32, c_ssize);
+UAC1_ATTRIBUTE(u32, p_chmask);
+UAC1_ATTRIBUTE(u32, p_srate);
+UAC1_ATTRIBUTE(u32, p_ssize);
+UAC1_ATTRIBUTE(u32, req_number);
+
+UAC1_ATTRIBUTE(bool, p_mute_present);
+UAC1_ATTRIBUTE(bool, p_volume_present);
+UAC1_ATTRIBUTE(s16, p_volume_min);
+UAC1_ATTRIBUTE(s16, p_volume_max);
+UAC1_ATTRIBUTE(s16, p_volume_res);
+
+UAC1_ATTRIBUTE(bool, c_mute_present);
+UAC1_ATTRIBUTE(bool, c_volume_present);
+UAC1_ATTRIBUTE(s16, c_volume_min);
+UAC1_ATTRIBUTE(s16, c_volume_max);
+UAC1_ATTRIBUTE(s16, c_volume_res);
 
 static struct configfs_attribute *f_uac1_attrs[] = {
 	&f_uac1_opts_attr_c_chmask,
@@ -842,6 +1441,19 @@ static struct configfs_attribute *f_uac1_attrs[] = {
 	&f_uac1_opts_attr_p_srate,
 	&f_uac1_opts_attr_p_ssize,
 	&f_uac1_opts_attr_req_number,
+
+	&f_uac1_opts_attr_p_mute_present,
+	&f_uac1_opts_attr_p_volume_present,
+	&f_uac1_opts_attr_p_volume_min,
+	&f_uac1_opts_attr_p_volume_max,
+	&f_uac1_opts_attr_p_volume_res,
+
+	&f_uac1_opts_attr_c_mute_present,
+	&f_uac1_opts_attr_c_volume_present,
+	&f_uac1_opts_attr_c_volume_min,
+	&f_uac1_opts_attr_c_volume_max,
+	&f_uac1_opts_attr_c_volume_res,
+
 	NULL,
 };
 
@@ -879,6 +1491,19 @@ static struct usb_function_instance *f_audio_alloc_inst(void)
 	opts->p_chmask = UAC1_DEF_PCHMASK;
 	opts->p_srate = UAC1_DEF_PSRATE;
 	opts->p_ssize = UAC1_DEF_PSSIZE;
+
+	opts->p_mute_present = UAC1_DEF_MUTE_PRESENT;
+	opts->p_volume_present = UAC1_DEF_VOLUME_PRESENT;
+	opts->p_volume_min = UAC1_DEF_MIN_DB;
+	opts->p_volume_max = UAC1_DEF_MAX_DB;
+	opts->p_volume_res = UAC1_DEF_RES_DB;
+
+	opts->c_mute_present = UAC1_DEF_MUTE_PRESENT;
+	opts->c_volume_present = UAC1_DEF_VOLUME_PRESENT;
+	opts->c_volume_min = UAC1_DEF_MIN_DB;
+	opts->c_volume_max = UAC1_DEF_MAX_DB;
+	opts->c_volume_res = UAC1_DEF_RES_DB;
+
 	opts->req_number = UAC1_DEF_REQ_NUM;
 	return &opts->func_inst;
 }
@@ -903,6 +1528,11 @@ static void f_audio_unbind(struct usb_configuration *c, struct usb_function *f)
 	g_audio_cleanup(audio);
 	usb_free_all_descriptors(f);
 
+	kfree(out_feature_unit_desc);
+	out_feature_unit_desc = NULL;
+	kfree(in_feature_unit_desc);
+	in_feature_unit_desc = NULL;
+
 	kfree(ac_header_desc);
 	ac_header_desc = NULL;
 
diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c
index ae29ff2b2b68..3c34995276e7 100644
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -5,6 +5,9 @@
  * Copyright (C) 2011
  *    Yadwinder Singh (yadi.brar01@gmail.com)
  *    Jaswinder Singh (jaswinder.singh@linaro.org)
+ *
+ * Copyright (C) 2020
+ *    Ruslan Bilovol (ruslan.bilovol@gmail.com)
  */
 
 #include <linux/usb/audio.h>
@@ -19,14 +22,16 @@
 
 /*
  * The driver implements a simple UAC_2 topology.
- * USB-OUT -> IT_1 -> OT_3 -> ALSA_Capture
- * ALSA_Playback -> IT_2 -> OT_4 -> USB-IN
+ * USB-OUT -> IT_1 -> FU -> OT_3 -> ALSA_Capture
+ * ALSA_Playback -> IT_2 -> FU -> OT_4 -> USB-IN
  * Capture and Playback sampling rates are independently
  *  controlled by two clock sources :
  *    CLK_5 := c_srate, and CLK_6 := p_srate
  */
 #define USB_OUT_CLK_ID	(out_clk_src_desc.bClockID)
 #define USB_IN_CLK_ID	(in_clk_src_desc.bClockID)
+#define USB_OUT_FU_ID	(out_feature_unit_desc->bUnitID)
+#define USB_IN_FU_ID	(in_feature_unit_desc->bUnitID)
 
 #define CONTROL_ABSENT	0
 #define CONTROL_RDONLY	1
@@ -34,6 +39,8 @@
 
 #define CLK_FREQ_CTRL	0
 #define CLK_VLD_CTRL	2
+#define FU_MUTE_CTRL	0
+#define FU_VOL_CTRL	2
 
 #define COPY_CTRL	0
 #define CONN_CTRL	2
@@ -44,12 +51,24 @@
 
 #define EPIN_EN(_opts) ((_opts)->p_chmask != 0)
 #define EPOUT_EN(_opts) ((_opts)->c_chmask != 0)
+#define FUIN_EN(_opts) (EPIN_EN(_opts) \
+				&& ((_opts)->p_mute_present \
+				|| (_opts)->p_volume_present))
+#define FUOUT_EN(_opts) (EPOUT_EN(_opts) \
+				&& ((_opts)->c_mute_present \
+				|| (_opts)->c_volume_present))
 #define EPOUT_FBACK_IN_EN(_opts) ((_opts)->c_sync == USB_ENDPOINT_SYNC_ASYNC)
 
 struct f_uac2 {
 	struct g_audio g_audio;
 	u8 ac_intf, as_in_intf, as_out_intf;
 	u8 ac_alt, as_in_alt, as_out_alt;	/* needed for get_alt() */
+
+	struct usb_ctrlrequest setup_cr;	/* will be used in data stage */
+
+	/* Interrupt IN endpoint of AC interface */
+	struct usb_ep	*int_ep;
+	atomic_t	int_count;
 };
 
 static inline struct f_uac2 *func_to_uac2(struct usb_function *f)
@@ -63,6 +82,8 @@ struct f_uac2_opts *g_audio_to_uac2_opts(struct g_audio *agdev)
 	return container_of(agdev->func.fi, struct f_uac2_opts, func_inst);
 }
 
+static int afunc_notify(struct g_audio *agdev, int unit_id, int cs);
+
 /* --------- USB Function Interface ------------- */
 
 enum {
@@ -74,6 +95,8 @@ enum {
 	STR_IO_IT,
 	STR_USB_OT,
 	STR_IO_OT,
+	STR_FU_IN,
+	STR_FU_OUT,
 	STR_AS_OUT_ALT0,
 	STR_AS_OUT_ALT1,
 	STR_AS_IN_ALT0,
@@ -92,6 +115,8 @@ static struct usb_string strings_fn[] = {
 	[STR_IO_IT].s = "USBD Out",
 	[STR_USB_OT].s = "USBH In",
 	[STR_IO_OT].s = "USBD In",
+	[STR_FU_IN].s = "Capture Volume",
+	[STR_FU_OUT].s = "Playback Volume",
 	[STR_AS_OUT_ALT0].s = "Playback Inactive",
 	[STR_AS_OUT_ALT1].s = "Playback Active",
 	[STR_AS_IN_ALT0].s = "Capture Inactive",
@@ -126,7 +151,7 @@ static struct usb_interface_descriptor std_ac_if_desc = {
 	.bDescriptorType = USB_DT_INTERFACE,
 
 	.bAlternateSetting = 0,
-	.bNumEndpoints = 0,
+	/* .bNumEndpoints = DYNAMIC */
 	.bInterfaceClass = USB_CLASS_AUDIO,
 	.bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
 	.bInterfaceProtocol = UAC_VERSION_2,
@@ -212,6 +237,9 @@ static struct uac2_output_terminal_descriptor io_out_ot_desc = {
 	.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL),
 };
 
+static struct uac2_feature_unit_descriptor *in_feature_unit_desc;
+static struct uac2_feature_unit_descriptor *out_feature_unit_desc;
+
 static struct uac2_ac_header_descriptor ac_hdr_desc = {
 	.bLength = sizeof ac_hdr_desc,
 	.bDescriptorType = USB_DT_CS_INTERFACE,
@@ -223,6 +251,36 @@ static struct uac2_ac_header_descriptor ac_hdr_desc = {
 	.bmControls = 0,
 };
 
+/* AC IN Interrupt Endpoint */
+static struct usb_endpoint_descriptor fs_ep_int_desc = {
+	.bLength = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType = USB_DT_ENDPOINT,
+
+	.bEndpointAddress = USB_DIR_IN,
+	.bmAttributes = USB_ENDPOINT_XFER_INT,
+	.wMaxPacketSize = cpu_to_le16(6),
+	.bInterval = 1,
+};
+
+static struct usb_endpoint_descriptor hs_ep_int_desc = {
+	.bLength = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType = USB_DT_ENDPOINT,
+
+	.bmAttributes = USB_ENDPOINT_XFER_INT,
+	.wMaxPacketSize = cpu_to_le16(6),
+	.bInterval = 4,
+};
+
+static struct usb_endpoint_descriptor ss_ep_int_desc = {
+	.bLength = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType = USB_DT_ENDPOINT,
+
+	.bEndpointAddress = USB_DIR_IN,
+	.bmAttributes = USB_ENDPOINT_XFER_INT,
+	.wMaxPacketSize = cpu_to_le16(6),
+	.bInterval = 4,
+};
+
 /* Audio Streaming OUT Interface - Alt0 */
 static struct usb_interface_descriptor std_as_out_if0_desc = {
 	.bLength = sizeof std_as_out_if0_desc,
@@ -452,10 +510,14 @@ static struct usb_descriptor_header *fs_audio_desc[] = {
 	(struct usb_descriptor_header *)&in_clk_src_desc,
 	(struct usb_descriptor_header *)&out_clk_src_desc,
 	(struct usb_descriptor_header *)&usb_out_it_desc,
+	(struct usb_descriptor_header *)&out_feature_unit_desc,
 	(struct usb_descriptor_header *)&io_in_it_desc,
 	(struct usb_descriptor_header *)&usb_in_ot_desc,
+	(struct usb_descriptor_header *)&in_feature_unit_desc,
 	(struct usb_descriptor_header *)&io_out_ot_desc,
 
+	(struct usb_descriptor_header *)&fs_ep_int_desc,
+
 	(struct usb_descriptor_header *)&std_as_out_if0_desc,
 	(struct usb_descriptor_header *)&std_as_out_if1_desc,
 
@@ -483,10 +545,14 @@ static struct usb_descriptor_header *hs_audio_desc[] = {
 	(struct usb_descriptor_header *)&in_clk_src_desc,
 	(struct usb_descriptor_header *)&out_clk_src_desc,
 	(struct usb_descriptor_header *)&usb_out_it_desc,
+	(struct usb_descriptor_header *)&out_feature_unit_desc,
 	(struct usb_descriptor_header *)&io_in_it_desc,
 	(struct usb_descriptor_header *)&usb_in_ot_desc,
+	(struct usb_descriptor_header *)&in_feature_unit_desc,
 	(struct usb_descriptor_header *)&io_out_ot_desc,
 
+	(struct usb_descriptor_header *)&hs_ep_int_desc,
+
 	(struct usb_descriptor_header *)&std_as_out_if0_desc,
 	(struct usb_descriptor_header *)&std_as_out_if1_desc,
 
@@ -514,10 +580,14 @@ static struct usb_descriptor_header *ss_audio_desc[] = {
 	(struct usb_descriptor_header *)&in_clk_src_desc,
 	(struct usb_descriptor_header *)&out_clk_src_desc,
 	(struct usb_descriptor_header *)&usb_out_it_desc,
+  (struct usb_descriptor_header *)&out_feature_unit_desc,
 	(struct usb_descriptor_header *)&io_in_it_desc,
 	(struct usb_descriptor_header *)&usb_in_ot_desc,
+	(struct usb_descriptor_header *)&in_feature_unit_desc,
 	(struct usb_descriptor_header *)&io_out_ot_desc,
 
+  (struct usb_descriptor_header *)&ss_ep_int_desc,
+
 	(struct usb_descriptor_header *)&std_as_out_if0_desc,
 	(struct usb_descriptor_header *)&std_as_out_if1_desc,
 
@@ -539,6 +609,17 @@ static struct usb_descriptor_header *ss_audio_desc[] = {
 	NULL,
 };
 
+struct cntrl_cur_lay2 {
+	__le16	wCUR;
+};
+
+struct cntrl_range_lay2 {
+	__le16	wNumSubRanges;
+	__le16	wMIN;
+	__le16	wMAX;
+	__le16	wRES;
+} __packed;
+
 struct cntrl_cur_lay3 {
 	__le32	dCUR;
 };
@@ -595,6 +676,26 @@ static int set_ep_max_packet_size(const struct f_uac2_opts *uac2_opts,
 	return 0;
 }
 
+static struct uac2_feature_unit_descriptor *build_fu_desc(int chmask)
+{
+	struct uac2_feature_unit_descriptor *fu_desc;
+	int channels = num_channels(chmask);
+	int fu_desc_size = UAC2_DT_FEATURE_UNIT_SIZE(channels);
+
+	fu_desc = kzalloc(fu_desc_size, GFP_KERNEL);
+	if (!fu_desc)
+		return NULL;
+
+	fu_desc->bLength = fu_desc_size;
+	fu_desc->bDescriptorType = USB_DT_CS_INTERFACE;
+
+	fu_desc->bDescriptorSubtype = UAC_FEATURE_UNIT;
+
+	/* bUnitID, bSourceID and bmaControls will be defined later */
+
+	return fu_desc;
+}
+
 /* Use macro to overcome line length limitation */
 #define USBDHDR(p) (struct usb_descriptor_header *)(p)
 
@@ -607,6 +708,7 @@ static void setup_headers(struct f_uac2_opts *opts,
 	struct usb_endpoint_descriptor *epout_desc;
 	struct usb_endpoint_descriptor *epin_desc;
 	struct usb_endpoint_descriptor *epin_fback_desc;
+	struct usb_endpoint_descriptor *ep_int_desc;
 	int i;
 
 	switch (speed) {
@@ -614,11 +716,13 @@ static void setup_headers(struct f_uac2_opts *opts,
 		epout_desc = &fs_epout_desc;
 		epin_desc = &fs_epin_desc;
 		epin_fback_desc = &fs_epin_fback_desc;
+		ep_int_desc = &fs_ep_int_desc;
 		break;
 	case USB_SPEED_HIGH:
 		epout_desc = &hs_epout_desc;
 		epin_desc = &hs_epin_desc;
 		epin_fback_desc = &hs_epin_fback_desc;
+		ep_int_desc = &hs_ep_int_desc;
 		break;
 	default:
 		epout_desc = &ss_epout_desc;
@@ -626,6 +730,7 @@ static void setup_headers(struct f_uac2_opts *opts,
 		epout_desc_comp = &ss_epout_desc_comp;
 		epin_desc_comp = &ss_epin_desc_comp;
 		epin_fback_desc = &ss_epin_fback_desc;
+		ep_int_desc = &ss_ep_int_desc;
 	}
 
 	i = 0;
@@ -637,13 +742,27 @@ static void setup_headers(struct f_uac2_opts *opts,
 	if (EPOUT_EN(opts)) {
 		headers[i++] = USBDHDR(&out_clk_src_desc);
 		headers[i++] = USBDHDR(&usb_out_it_desc);
-	}
+
+    if (FUOUT_EN(opts))
+      headers[i++] = USBDHDR(out_feature_unit_desc);
+  }
+
 	if (EPIN_EN(opts)) {
 		headers[i++] = USBDHDR(&io_in_it_desc);
+
+    if (FUIN_EN(opts))
+      headers[i++] = USBDHDR(in_feature_unit_desc);
+
 		headers[i++] = USBDHDR(&usb_in_ot_desc);
 	}
-	if (EPOUT_EN(opts)) {
+
+	if (EPOUT_EN(opts))
 		headers[i++] = USBDHDR(&io_out_ot_desc);
+
+  if (FUOUT_EN(opts) || FUIN_EN(opts))
+      headers[i++] = USBDHDR(ep_int_desc);
+
+  if (EPOUT_EN(opts)) {
 		headers[i++] = USBDHDR(&std_as_out_if0_desc);
 		headers[i++] = USBDHDR(&std_as_out_if1_desc);
 		headers[i++] = USBDHDR(&as_out_hdr_desc);
@@ -657,6 +776,7 @@ static void setup_headers(struct f_uac2_opts *opts,
 		if (EPOUT_FBACK_IN_EN(opts))
 			headers[i++] = USBDHDR(epin_fback_desc);
 	}
+
 	if (EPIN_EN(opts)) {
 		headers[i++] = USBDHDR(&std_as_in_if0_desc);
 		headers[i++] = USBDHDR(&std_as_in_if1_desc);
@@ -684,17 +804,35 @@ static void setup_descriptor(struct f_uac2_opts *opts)
 		io_out_ot_desc.bTerminalID = i++;
 	if (EPIN_EN(opts))
 		usb_in_ot_desc.bTerminalID = i++;
+	if (FUOUT_EN(opts))
+		out_feature_unit_desc->bUnitID = i++;
+	if (FUIN_EN(opts))
+		in_feature_unit_desc->bUnitID = i++;
 	if (EPOUT_EN(opts))
 		out_clk_src_desc.bClockID = i++;
 	if (EPIN_EN(opts))
 		in_clk_src_desc.bClockID = i++;
 
 	usb_out_it_desc.bCSourceID = out_clk_src_desc.bClockID;
-	usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID;
+
+	if (FUIN_EN(opts)) {
+		usb_in_ot_desc.bSourceID = in_feature_unit_desc->bUnitID;
+		in_feature_unit_desc->bSourceID = io_in_it_desc.bTerminalID;
+	} else {
+		usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID;
+	}
+
 	usb_in_ot_desc.bCSourceID = in_clk_src_desc.bClockID;
 	io_in_it_desc.bCSourceID = in_clk_src_desc.bClockID;
 	io_out_ot_desc.bCSourceID = out_clk_src_desc.bClockID;
-	io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID;
+
+	if (FUOUT_EN(opts)) {
+		io_out_ot_desc.bSourceID = out_feature_unit_desc->bUnitID;
+		out_feature_unit_desc->bSourceID = usb_out_it_desc.bTerminalID;
+	} else {
+		io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID;
+	}
+
 	as_out_hdr_desc.bTerminalLink = usb_out_it_desc.bTerminalID;
 	as_in_hdr_desc.bTerminalLink = usb_in_ot_desc.bTerminalID;
 
@@ -706,6 +844,10 @@ static void setup_descriptor(struct f_uac2_opts *opts)
 
 		len += sizeof(in_clk_src_desc);
 		len += sizeof(usb_in_ot_desc);
+
+		if (FUIN_EN(opts))
+			len += in_feature_unit_desc->bLength;
+
 		len += sizeof(io_in_it_desc);
 		ac_hdr_desc.wTotalLength = cpu_to_le16(len);
 		iad_desc.bInterfaceCount++;
@@ -715,6 +857,10 @@ static void setup_descriptor(struct f_uac2_opts *opts)
 
 		len += sizeof(out_clk_src_desc);
 		len += sizeof(usb_out_it_desc);
+
+		if (FUOUT_EN(opts))
+			len += out_feature_unit_desc->bLength;
+
 		len += sizeof(io_out_ot_desc);
 		ac_hdr_desc.wTotalLength = cpu_to_le16(len);
 		iad_desc.bInterfaceCount++;
@@ -752,6 +898,28 @@ static int afunc_validate_opts(struct g_audio *agdev, struct device *dev)
 		return -EINVAL;
 	}
 
+	if (opts->p_volume_max <= opts->p_volume_min) {
+		dev_err(dev, "Error: incorrect playback volume max/min\n");
+			return -EINVAL;
+	} else if (opts->c_volume_max <= opts->c_volume_min) {
+		dev_err(dev, "Error: incorrect capture volume max/min\n");
+			return -EINVAL;
+	} else if (opts->p_volume_res <= 0) {
+		dev_err(dev, "Error: negative/zero playback volume resolution\n");
+			return -EINVAL;
+	} else if (opts->c_volume_res <= 0) {
+		dev_err(dev, "Error: negative/zero capture volume resolution\n");
+			return -EINVAL;
+	}
+
+	if ((opts->p_volume_max - opts->p_volume_min) % opts->p_volume_res) {
+		dev_err(dev, "Error: incorrect playback volume resolution\n");
+			return -EINVAL;
+	} else if ((opts->c_volume_max - opts->c_volume_min) % opts->c_volume_res) {
+		dev_err(dev, "Error: incorrect capture volume resolution\n");
+			return -EINVAL;
+	}
+
 	return 0;
 }
 
@@ -774,6 +942,20 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 	us = usb_gstrings_attach(cdev, fn_strings, ARRAY_SIZE(strings_fn));
 	if (IS_ERR(us))
 		return PTR_ERR(us);
+
+	if (FUOUT_EN(uac2_opts)) {
+		out_feature_unit_desc = build_fu_desc(uac2_opts->c_chmask);
+		if (!out_feature_unit_desc)
+			return -ENOMEM;
+	}
+	if (FUIN_EN(uac2_opts)) {
+		in_feature_unit_desc = build_fu_desc(uac2_opts->p_chmask);
+		if (!in_feature_unit_desc) {
+			ret = -ENOMEM;
+			goto err_free_fu;
+		}
+	}
+
 	iad_desc.iFunction = us[STR_ASSOC].id;
 	std_ac_if_desc.iInterface = us[STR_IF_CTRL].id;
 	in_clk_src_desc.iClockSource = us[STR_CLKSRC_IN].id;
@@ -787,6 +969,17 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 	std_as_in_if0_desc.iInterface = us[STR_AS_IN_ALT0].id;
 	std_as_in_if1_desc.iInterface = us[STR_AS_IN_ALT1].id;
 
+	if (FUOUT_EN(uac2_opts)) {
+		u8 *i_feature = (u8 *)out_feature_unit_desc +
+				out_feature_unit_desc->bLength - 1;
+		*i_feature = us[STR_FU_OUT].id;
+	}
+	if (FUIN_EN(uac2_opts)) {
+		u8 *i_feature = (u8 *)in_feature_unit_desc +
+				in_feature_unit_desc->bLength - 1;
+		*i_feature = us[STR_FU_IN].id;
+	}
+
 
 	/* Initialize the configurable parameters */
 	usb_out_it_desc.bNrChannels = num_channels(uac2_opts->c_chmask);
@@ -801,6 +994,26 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 	as_out_fmt1_desc.bBitResolution = uac2_opts->c_ssize * 8;
 	as_in_fmt1_desc.bSubslotSize = uac2_opts->p_ssize;
 	as_in_fmt1_desc.bBitResolution = uac2_opts->p_ssize * 8;
+	if (FUOUT_EN(uac2_opts)) {
+		__le32 *bma = (__le32 *)&out_feature_unit_desc->bmaControls[0];
+		u32 control = 0;
+
+		if (uac2_opts->c_mute_present)
+			control |= CONTROL_RDWR << FU_MUTE_CTRL;
+		if (uac2_opts->c_volume_present)
+			control |= CONTROL_RDWR << FU_VOL_CTRL;
+		*bma = cpu_to_le32(control);
+	}
+	if (FUIN_EN(uac2_opts)) {
+		__le32 *bma = (__le32 *)&in_feature_unit_desc->bmaControls[0];
+		u32 control = 0;
+
+		if (uac2_opts->p_mute_present)
+			control |= CONTROL_RDWR << FU_MUTE_CTRL;
+		if (uac2_opts->p_volume_present)
+			control |= CONTROL_RDWR << FU_VOL_CTRL;
+		*bma = cpu_to_le32(control);
+	}
 
 	snprintf(clksrc_in, sizeof(clksrc_in), "%uHz", uac2_opts->p_srate);
 	snprintf(clksrc_out, sizeof(clksrc_out), "%uHz", uac2_opts->c_srate);
@@ -808,7 +1021,7 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 	ret = usb_interface_id(cfg, fn);
 	if (ret < 0) {
 		dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
-		return ret;
+		goto err_free_fu;
 	}
 	iad_desc.bFirstInterface = ret;
 
@@ -820,7 +1033,7 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 		ret = usb_interface_id(cfg, fn);
 		if (ret < 0) {
 			dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
-			return ret;
+			goto err_free_fu;
 		}
 		std_as_out_if0_desc.bInterfaceNumber = ret;
 		std_as_out_if1_desc.bInterfaceNumber = ret;
@@ -849,7 +1062,7 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 		ret = usb_interface_id(cfg, fn);
 		if (ret < 0) {
 			dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
-			return ret;
+			goto err_free_fu;
 		}
 		std_as_in_if0_desc.bInterfaceNumber = ret;
 		std_as_in_if1_desc.bInterfaceNumber = ret;
@@ -857,6 +1070,17 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 		uac2->as_in_alt = 0;
 	}
 
+	if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) {
+		uac2->int_ep = usb_ep_autoconfig(gadget, &fs_ep_int_desc);
+		if (!uac2->int_ep) {
+			dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
+			ret = -ENODEV;
+			goto err_free_fu;
+		}
+
+		std_ac_if_desc.bNumEndpoints = 1;
+	}
+
 	/* Calculate wMaxPacketSize according to audio bandwidth */
 	ret = set_ep_max_packet_size(uac2_opts, &fs_epin_desc, USB_SPEED_FULL,
 				     true);
@@ -904,7 +1128,8 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 		agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
 		if (!agdev->out_ep) {
 			dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
-			return -ENODEV;
+			ret = -ENODEV;
+			goto err_free_fu;
 		}
 		if (EPOUT_FBACK_IN_EN(uac2_opts)) {
 			agdev->in_ep_fback = usb_ep_autoconfig(gadget,
@@ -912,7 +1137,8 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 			if (!agdev->in_ep_fback) {
 				dev_err(dev, "%s:%d Error!\n",
 					__func__, __LINE__);
-				return -ENODEV;
+				ret = -ENODEV;
+				goto err_free_fu;
 			}
 		}
 	}
@@ -921,7 +1147,8 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 		agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc);
 		if (!agdev->in_ep) {
 			dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
-			return -ENODEV;
+			ret = -ENODEV;
+			goto err_free_fu;
 		}
 	}
 
@@ -937,38 +1164,137 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 	agdev->out_ep_maxpsize = max_t(u16, agdev->out_ep_maxpsize,
 				le16_to_cpu(ss_epout_desc.wMaxPacketSize));
 
+	// HS and SS endpoint addresses are copied from autoconfigured FS descriptors
+	hs_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress;
 	hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
 	hs_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress;
 	hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
 	ss_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
 	ss_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress;
 	ss_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
+	ss_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress;
 
 	setup_descriptor(uac2_opts);
 
 	ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, ss_audio_desc,
 				     ss_audio_desc);
 	if (ret)
-		return ret;
+		goto err_free_fu;
 
 	agdev->gadget = gadget;
 
 	agdev->params.p_chmask = uac2_opts->p_chmask;
 	agdev->params.p_srate = uac2_opts->p_srate;
 	agdev->params.p_ssize = uac2_opts->p_ssize;
+	if (FUIN_EN(uac2_opts)) {
+		agdev->params.p_fu.id = USB_IN_FU_ID;
+		agdev->params.p_fu.mute_present = uac2_opts->p_mute_present;
+		agdev->params.p_fu.volume_present = uac2_opts->p_volume_present;
+		agdev->params.p_fu.volume_min = uac2_opts->p_volume_min;
+		agdev->params.p_fu.volume_max = uac2_opts->p_volume_max;
+		agdev->params.p_fu.volume_res = uac2_opts->p_volume_res;
+	}
 	agdev->params.c_chmask = uac2_opts->c_chmask;
 	agdev->params.c_srate = uac2_opts->c_srate;
 	agdev->params.c_ssize = uac2_opts->c_ssize;
+	if (FUOUT_EN(uac2_opts)) {
+		agdev->params.c_fu.id = USB_OUT_FU_ID;
+		agdev->params.c_fu.mute_present = uac2_opts->c_mute_present;
+		agdev->params.c_fu.volume_present = uac2_opts->c_volume_present;
+		agdev->params.c_fu.volume_min = uac2_opts->c_volume_min;
+		agdev->params.c_fu.volume_max = uac2_opts->c_volume_max;
+		agdev->params.c_fu.volume_res = uac2_opts->c_volume_res;
+	}
 	agdev->params.req_number = uac2_opts->req_number;
 	agdev->params.fb_max = uac2_opts->fb_max;
+
+	if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts))
+    agdev->notify = afunc_notify;
+
 	ret = g_audio_setup(agdev, "UAC2 PCM", "UAC2_Gadget");
 	if (ret)
 		goto err_free_descs;
+
 	return 0;
 
 err_free_descs:
 	usb_free_all_descriptors(fn);
 	agdev->gadget = NULL;
+err_free_fu:
+	kfree(out_feature_unit_desc);
+	out_feature_unit_desc = NULL;
+	kfree(in_feature_unit_desc);
+	in_feature_unit_desc = NULL;
+	return ret;
+}
+
+static void
+afunc_notify_complete(struct usb_ep *_ep, struct usb_request *req)
+{
+	struct g_audio *agdev = req->context;
+	struct f_uac2 *uac2 = func_to_uac2(&agdev->func);
+
+	atomic_dec(&uac2->int_count);
+	kfree(req->buf);
+	usb_ep_free_request(_ep, req);
+}
+
+static int
+afunc_notify(struct g_audio *agdev, int unit_id, int cs)
+{
+	struct f_uac2 *uac2 = func_to_uac2(&agdev->func);
+	struct usb_request *req;
+	struct uac2_interrupt_data_msg *msg;
+	u16 w_index, w_value;
+	int ret;
+
+	if (!uac2->int_ep->enabled)
+		return 0;
+
+	if (atomic_inc_return(&uac2->int_count) > UAC2_DEF_INT_REQ_NUM) {
+		atomic_dec(&uac2->int_count);
+		return 0;
+	}
+
+	req = usb_ep_alloc_request(uac2->int_ep, GFP_ATOMIC);
+	if (req == NULL) {
+		ret = -ENOMEM;
+		goto err_dec_int_count;
+	}
+
+	msg = kzalloc(sizeof(*msg), GFP_ATOMIC);
+	if (msg == NULL) {
+		ret = -ENOMEM;
+		goto err_free_request;
+	}
+
+	w_index = unit_id << 8 | uac2->ac_intf;
+	w_value = cs << 8;
+
+	msg->bInfo = 0; /* Non-vendor, interface interrupt */
+	msg->bAttribute = UAC2_CS_CUR;
+	msg->wIndex = cpu_to_le16(w_index);
+	msg->wValue = cpu_to_le16(w_value);
+
+	req->length = sizeof(*msg);
+	req->buf = msg;
+	req->context = agdev;
+	req->complete = afunc_notify_complete;
+
+	ret = usb_ep_queue(uac2->int_ep, req, GFP_ATOMIC);
+
+	if (ret)
+		goto err_free_msg;
+
+	return 0;
+
+err_free_msg:
+	kfree(msg);
+err_free_request:
+	usb_ep_free_request(uac2->int_ep, req);
+err_dec_int_count:
+	atomic_dec(&uac2->int_count);
+
 	return ret;
 }
 
@@ -977,6 +1303,7 @@ afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt)
 {
 	struct usb_composite_dev *cdev = fn->config->cdev;
 	struct f_uac2 *uac2 = func_to_uac2(fn);
+	struct g_audio *agdev = func_to_g_audio(fn);
 	struct usb_gadget *gadget = cdev->gadget;
 	struct device *dev = &gadget->dev;
 	int ret = 0;
@@ -993,6 +1320,14 @@ afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt)
 			dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
 			return -EINVAL;
 		}
+
+		/* restart interrupt endpoint */
+		if (uac2->int_ep) {
+			usb_ep_disable(uac2->int_ep);
+			config_ep_by_speed(gadget, &agdev->func, uac2->int_ep);
+			usb_ep_enable(uac2->int_ep);
+		}
+
 		return 0;
 	}
 
@@ -1047,6 +1382,8 @@ afunc_disable(struct usb_function *fn)
 	uac2->as_out_alt = 0;
 	u_audio_stop_capture(&uac2->g_audio);
 	u_audio_stop_playback(&uac2->g_audio);
+	if (uac2->int_ep)
+		usb_ep_disable(uac2->int_ep);
 }
 
 static int
@@ -1054,7 +1391,7 @@ in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
 {
 	struct usb_request *req = fn->config->cdev->req;
 	struct g_audio *agdev = func_to_g_audio(fn);
-	struct f_uac2_opts *opts;
+	struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev);
 	u16 w_length = le16_to_cpu(cr->wLength);
 	u16 w_index = le16_to_cpu(cr->wIndex);
 	u16 w_value = le16_to_cpu(cr->wValue);
@@ -1063,28 +1400,64 @@ in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
 	int value = -EOPNOTSUPP;
 	int p_srate, c_srate;
 
-	opts = g_audio_to_uac2_opts(agdev);
 	p_srate = opts->p_srate;
 	c_srate = opts->c_srate;
 
-	if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
-		struct cntrl_cur_lay3 c;
-		memset(&c, 0, sizeof(struct cntrl_cur_lay3));
+	if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) {
+		if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
+			struct cntrl_cur_lay3 c;
+
+			memset(&c, 0, sizeof(struct cntrl_cur_lay3));
+
+			if (entity_id == USB_IN_CLK_ID)
+				c.dCUR = cpu_to_le32(p_srate);
+			else if (entity_id == USB_OUT_CLK_ID)
+				c.dCUR = cpu_to_le32(c_srate);
+
+			value = min_t(unsigned int, w_length, sizeof(c));
+			memcpy(req->buf, &c, value);
+		} else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) {
+			*(u8 *)req->buf = 1;
+			value = min_t(unsigned int, w_length, 1);
+		} else {
+			dev_err(&agdev->gadget->dev,
+				"%s:%d control_selector=%d TODO!\n",
+				__func__, __LINE__, control_selector);
+		}
+	} else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+			(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+		unsigned int is_playback = 0;
+
+		if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
+			is_playback = 1;
 
-		if (entity_id == USB_IN_CLK_ID)
-			c.dCUR = cpu_to_le32(p_srate);
-		else if (entity_id == USB_OUT_CLK_ID)
-			c.dCUR = cpu_to_le32(c_srate);
+		if (control_selector == UAC_FU_MUTE) {
+			unsigned int mute;
 
-		value = min_t(unsigned, w_length, sizeof c);
-		memcpy(req->buf, &c, value);
-	} else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) {
-		*(u8 *)req->buf = 1;
-		value = min_t(unsigned, w_length, 1);
+			u_audio_get_mute(agdev, is_playback, &mute);
+
+			*(u8 *)req->buf = mute;
+			value = min_t(unsigned int, w_length, 1);
+		} else if (control_selector == UAC_FU_VOLUME) {
+			struct cntrl_cur_lay2 c;
+			s16 volume;
+
+			memset(&c, 0, sizeof(struct cntrl_cur_lay2));
+
+			u_audio_get_volume(agdev, is_playback, &volume);
+			c.wCUR = cpu_to_le16(volume);
+
+			value = min_t(unsigned int, w_length, sizeof(c));
+			memcpy(req->buf, &c, value);
+		} else {
+			dev_err(&agdev->gadget->dev,
+				"%s:%d control_selector=%d TODO!\n",
+				__func__, __LINE__, control_selector);
+		}
 	} else {
 		dev_err(&agdev->gadget->dev,
-			"%s:%d control_selector=%d TODO!\n",
-			__func__, __LINE__, control_selector);
+			"%s:%d entity_id=%d control_selector=%d TODO!\n",
+			__func__, __LINE__, entity_id, control_selector);
 	}
 
 	return value;
@@ -1095,38 +1468,77 @@ in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr)
 {
 	struct usb_request *req = fn->config->cdev->req;
 	struct g_audio *agdev = func_to_g_audio(fn);
-	struct f_uac2_opts *opts;
+	struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev);
 	u16 w_length = le16_to_cpu(cr->wLength);
 	u16 w_index = le16_to_cpu(cr->wIndex);
 	u16 w_value = le16_to_cpu(cr->wValue);
 	u8 entity_id = (w_index >> 8) & 0xff;
 	u8 control_selector = w_value >> 8;
-	struct cntrl_range_lay3 r;
 	int value = -EOPNOTSUPP;
 	int p_srate, c_srate;
 
-	opts = g_audio_to_uac2_opts(agdev);
 	p_srate = opts->p_srate;
 	c_srate = opts->c_srate;
 
-	if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
-		if (entity_id == USB_IN_CLK_ID)
-			r.dMIN = cpu_to_le32(p_srate);
-		else if (entity_id == USB_OUT_CLK_ID)
-			r.dMIN = cpu_to_le32(c_srate);
-		else
-			return -EOPNOTSUPP;
+	if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) {
+		if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
+			struct cntrl_range_lay3 r;
+
+			if (entity_id == USB_IN_CLK_ID)
+				r.dMIN = cpu_to_le32(p_srate);
+			else if (entity_id == USB_OUT_CLK_ID)
+				r.dMIN = cpu_to_le32(c_srate);
+			else
+				return -EOPNOTSUPP;
 
-		r.dMAX = r.dMIN;
-		r.dRES = 0;
-		r.wNumSubRanges = cpu_to_le16(1);
+			r.dMAX = r.dMIN;
+			r.dRES = 0;
+			r.wNumSubRanges = cpu_to_le16(1);
 
-		value = min_t(unsigned, w_length, sizeof r);
-		memcpy(req->buf, &r, value);
+			value = min_t(unsigned int, w_length, sizeof(r));
+			memcpy(req->buf, &r, value);
+		} else {
+			dev_err(&agdev->gadget->dev,
+				"%s:%d control_selector=%d TODO!\n",
+				__func__, __LINE__, control_selector);
+		}
+	} else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+			(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+		unsigned int is_playback = 0;
+
+		if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
+			is_playback = 1;
+
+		if (control_selector == UAC_FU_VOLUME) {
+			struct cntrl_range_lay2 r;
+			s16 max_db, min_db, res_db;
+
+			if (is_playback) {
+				max_db = opts->p_volume_max;
+				min_db = opts->p_volume_min;
+				res_db = opts->p_volume_res;
+			} else {
+				max_db = opts->c_volume_max;
+				min_db = opts->c_volume_min;
+				res_db = opts->c_volume_res;
+			}
+
+			r.wMAX = cpu_to_le16(max_db);
+			r.wMIN = cpu_to_le16(min_db);
+			r.wRES = cpu_to_le16(res_db);
+			r.wNumSubRanges = cpu_to_le16(1);
+
+			value = min_t(unsigned int, w_length, sizeof(r));
+			memcpy(req->buf, &r, value);
+		} else {
+			dev_err(&agdev->gadget->dev,
+				"%s:%d control_selector=%d TODO!\n",
+				__func__, __LINE__, control_selector);
+		}
 	} else {
 		dev_err(&agdev->gadget->dev,
-			"%s:%d control_selector=%d TODO!\n",
-			__func__, __LINE__, control_selector);
+			"%s:%d entity_id=%d control_selector=%d TODO!\n",
+			__func__, __LINE__, entity_id, control_selector);
 	}
 
 	return value;
@@ -1143,16 +1555,82 @@ ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr)
 		return -EOPNOTSUPP;
 }
 
+static void
+out_rq_cur_complete(struct usb_ep *ep, struct usb_request *req)
+{
+	struct g_audio *agdev = req->context;
+	struct usb_composite_dev *cdev = agdev->func.config->cdev;
+	struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev);
+	struct f_uac2 *uac2 = func_to_uac2(&agdev->func);
+	struct usb_ctrlrequest *cr = &uac2->setup_cr;
+	u16 w_index = le16_to_cpu(cr->wIndex);
+	u16 w_value = le16_to_cpu(cr->wValue);
+	u8 entity_id = (w_index >> 8) & 0xff;
+	u8 control_selector = w_value >> 8;
+
+	if (req->status != 0) {
+		dev_dbg(&cdev->gadget->dev, "completion err %d\n", req->status);
+		return;
+	}
+
+	if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+		(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+		unsigned int is_playback = 0;
+
+		if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
+			is_playback = 1;
+
+		if (control_selector == UAC_FU_MUTE) {
+			u8 mute = *(u8 *)req->buf;
+
+			u_audio_set_mute(agdev, is_playback, mute);
+
+			return;
+		} else if (control_selector == UAC_FU_VOLUME) {
+			struct cntrl_cur_lay2 *c = req->buf;
+			s16 volume;
+
+			volume = le16_to_cpu(c->wCUR);
+			u_audio_set_volume(agdev, is_playback, volume);
+
+			return;
+		} else {
+			dev_err(&agdev->gadget->dev,
+				"%s:%d control_selector=%d TODO!\n",
+				__func__, __LINE__, control_selector);
+			usb_ep_set_halt(ep);
+		}
+	}
+}
+
 static int
 out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
 {
+	struct usb_request *req = fn->config->cdev->req;
+	struct g_audio *agdev = func_to_g_audio(fn);
+	struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev);
+	struct f_uac2 *uac2 = func_to_uac2(fn);
 	u16 w_length = le16_to_cpu(cr->wLength);
+	u16 w_index = le16_to_cpu(cr->wIndex);
 	u16 w_value = le16_to_cpu(cr->wValue);
+	u8 entity_id = (w_index >> 8) & 0xff;
 	u8 control_selector = w_value >> 8;
 
-	if (control_selector == UAC2_CS_CONTROL_SAM_FREQ)
-		return w_length;
+	if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) {
+		if (control_selector == UAC2_CS_CONTROL_SAM_FREQ)
+			return w_length;
+	} else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+			(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+		memcpy(&uac2->setup_cr, cr, sizeof(*cr));
+		req->context = agdev;
+		req->complete = out_rq_cur_complete;
 
+		return w_length;
+	} else {
+		dev_err(&agdev->gadget->dev,
+			"%s:%d entity_id=%d control_selector=%d TODO!\n",
+			__func__, __LINE__, entity_id, control_selector);
+	}
 	return -EOPNOTSUPP;
 }
 
@@ -1228,7 +1706,15 @@ static struct configfs_item_operations f_uac2_item_ops = {
 	.release	= f_uac2_attr_release,
 };
 
-#define UAC2_ATTRIBUTE(name)						\
+#define uac2_kstrtou32 kstrtou32
+#define uac2_kstrtos16 kstrtos16
+#define uac2_kstrtobool(s, base, res) kstrtobool((s), (res))
+
+static const char *u32_fmt = "%u\n";
+static const char *s16_fmt = "%hd\n";
+static const char *bool_fmt = "%u\n";
+
+#define UAC2_ATTRIBUTE(type, name)					\
 static ssize_t f_uac2_opts_##name##_show(struct config_item *item,	\
 					 char *page)			\
 {									\
@@ -1236,7 +1722,7 @@ static ssize_t f_uac2_opts_##name##_show(struct config_item *item,	\
 	int result;							\
 									\
 	mutex_lock(&opts->lock);					\
-	result = sprintf(page, "%u\n", opts->name);			\
+	result = sprintf(page, type##_fmt, opts->name);			\
 	mutex_unlock(&opts->lock);					\
 									\
 	return result;							\
@@ -1247,7 +1733,7 @@ static ssize_t f_uac2_opts_##name##_store(struct config_item *item,	\
 {									\
 	struct f_uac2_opts *opts = to_f_uac2_opts(item);		\
 	int ret;							\
-	u32 num;							\
+	type num;							\
 									\
 	mutex_lock(&opts->lock);					\
 	if (opts->refcnt) {						\
@@ -1255,7 +1741,7 @@ static ssize_t f_uac2_opts_##name##_store(struct config_item *item,	\
 		goto end;						\
 	}								\
 									\
-	ret = kstrtou32(page, 0, &num);					\
+	ret = uac2_kstrto##type(page, 0, &num);				\
 	if (ret)							\
 		goto end;						\
 									\
@@ -1325,15 +1811,27 @@ end:									\
 									\
 CONFIGFS_ATTR(f_uac2_opts_, name)
 
-UAC2_ATTRIBUTE(p_chmask);
-UAC2_ATTRIBUTE(p_srate);
-UAC2_ATTRIBUTE(p_ssize);
-UAC2_ATTRIBUTE(c_chmask);
-UAC2_ATTRIBUTE(c_srate);
+UAC2_ATTRIBUTE(u32, p_chmask);
+UAC2_ATTRIBUTE(u32, p_srate);
+UAC2_ATTRIBUTE(u32, p_ssize);
+UAC2_ATTRIBUTE(u32, c_chmask);
+UAC2_ATTRIBUTE(u32, c_srate);
 UAC2_ATTRIBUTE_SYNC(c_sync);
-UAC2_ATTRIBUTE(c_ssize);
-UAC2_ATTRIBUTE(req_number);
-UAC2_ATTRIBUTE(fb_max);
+UAC2_ATTRIBUTE(u32, c_ssize);
+UAC2_ATTRIBUTE(u32, req_number);
+
+UAC2_ATTRIBUTE(bool, p_mute_present);
+UAC2_ATTRIBUTE(bool, p_volume_present);
+UAC2_ATTRIBUTE(s16, p_volume_min);
+UAC2_ATTRIBUTE(s16, p_volume_max);
+UAC2_ATTRIBUTE(s16, p_volume_res);
+
+UAC2_ATTRIBUTE(bool, c_mute_present);
+UAC2_ATTRIBUTE(bool, c_volume_present);
+UAC2_ATTRIBUTE(s16, c_volume_min);
+UAC2_ATTRIBUTE(s16, c_volume_max);
+UAC2_ATTRIBUTE(s16, c_volume_res);
+UAC2_ATTRIBUTE(u32, fb_max);
 
 static struct configfs_attribute *f_uac2_attrs[] = {
 	&f_uac2_opts_attr_p_chmask,
@@ -1345,6 +1843,19 @@ static struct configfs_attribute *f_uac2_attrs[] = {
 	&f_uac2_opts_attr_c_sync,
 	&f_uac2_opts_attr_req_number,
 	&f_uac2_opts_attr_fb_max,
+
+	&f_uac2_opts_attr_p_mute_present,
+	&f_uac2_opts_attr_p_volume_present,
+	&f_uac2_opts_attr_p_volume_min,
+	&f_uac2_opts_attr_p_volume_max,
+	&f_uac2_opts_attr_p_volume_res,
+
+	&f_uac2_opts_attr_c_mute_present,
+	&f_uac2_opts_attr_c_volume_present,
+	&f_uac2_opts_attr_c_volume_min,
+	&f_uac2_opts_attr_c_volume_max,
+	&f_uac2_opts_attr_c_volume_res,
+
 	NULL,
 };
 
@@ -1383,6 +1894,19 @@ static struct usb_function_instance *afunc_alloc_inst(void)
 	opts->c_srate = UAC2_DEF_CSRATE;
 	opts->c_ssize = UAC2_DEF_CSSIZE;
 	opts->c_sync = UAC2_DEF_CSYNC;
+
+	opts->p_mute_present = UAC2_DEF_MUTE_PRESENT;
+	opts->p_volume_present = UAC2_DEF_VOLUME_PRESENT;
+	opts->p_volume_min = UAC2_DEF_MIN_DB;
+	opts->p_volume_max = UAC2_DEF_MAX_DB;
+	opts->p_volume_res = UAC2_DEF_RES_DB;
+
+	opts->c_mute_present = UAC2_DEF_MUTE_PRESENT;
+	opts->c_volume_present = UAC2_DEF_VOLUME_PRESENT;
+	opts->c_volume_min = UAC2_DEF_MIN_DB;
+	opts->c_volume_max = UAC2_DEF_MAX_DB;
+	opts->c_volume_res = UAC2_DEF_RES_DB;
+
 	opts->req_number = UAC2_DEF_REQ_NUM;
 	opts->fb_max = UAC2_DEF_FB_MAX;
 	return &opts->func_inst;
@@ -1409,6 +1933,11 @@ static void afunc_unbind(struct usb_configuration *c, struct usb_function *f)
 	usb_free_all_descriptors(f);
 
 	agdev->gadget = NULL;
+
+	kfree(out_feature_unit_desc);
+	out_feature_unit_desc = NULL;
+	kfree(in_feature_unit_desc);
+	in_feature_unit_desc = NULL;
 }
 
 static struct usb_function *afunc_alloc(struct usb_function_instance *fi)
@@ -1441,3 +1970,4 @@ DECLARE_USB_FUNCTION_INIT(uac2, afunc_alloc_inst, afunc_alloc);
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Yadwinder Singh");
 MODULE_AUTHOR("Jaswinder Singh");
+MODULE_AUTHOR("Ruslan Bilovol");
diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
index f48a00e49794..9d87c0fb8f92 100644
--- a/drivers/usb/gadget/function/f_uvc.c
+++ b/drivers/usb/gadget/function/f_uvc.c
@@ -418,6 +418,7 @@ uvc_register_video(struct uvc_device *uvc)
 
 	/* TODO reference counting. */
 	uvc->vdev.v4l2_dev = &uvc->v4l2_dev;
+	uvc->vdev.v4l2_dev->dev = &cdev->gadget->dev;
 	uvc->vdev.fops = &uvc_v4l2_fops;
 	uvc->vdev.ioctl_ops = &uvc_v4l2_ioctl_ops;
 	uvc->vdev.release = video_device_release_empty;
diff --git a/drivers/usb/gadget/function/u_audio.c b/drivers/usb/gadget/function/u_audio.c
index 018dd0978995..32ef22857083 100644
--- a/drivers/usb/gadget/function/u_audio.c
+++ b/drivers/usb/gadget/function/u_audio.c
@@ -12,11 +12,14 @@
  *    Jaswinder Singh (jaswinder.singh@linaro.org)
  */
 
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/control.h>
+#include <sound/tlv.h>
+#include <linux/usb/audio.h>
 
 #include "u_audio.h"
 
@@ -24,6 +27,12 @@
 #define PRD_SIZE_MAX	PAGE_SIZE
 #define MIN_PERIODS	4
 
+enum {
+	UAC_FBACK_CTRL,
+	UAC_MUTE_CTRL,
+	UAC_VOLUME_CTRL,
+};
+
 /* Runtime data params for one stream */
 struct uac_rtd_params {
 	struct snd_uac_chip *uac; /* parent chip */
@@ -43,6 +52,17 @@ struct uac_rtd_params {
 
 	struct usb_request *req_fback; /* Feedback endpoint request */
 	bool fb_ep_enabled; /* if the ep is enabled */
+
+  /* Volume/Mute controls and their state */
+  int fu_id; /* Feature Unit ID */
+  struct snd_kcontrol *snd_kctl_volume;
+  struct snd_kcontrol *snd_kctl_mute;
+  s16 volume_min, volume_max, volume_res;
+  s16 volume;
+  int mute;
+
+  spinlock_t lock; /* lock for control transfers */
+
 };
 
 struct snd_uac_chip {
@@ -230,7 +250,13 @@ static void u_audio_iso_fback_complete(struct usb_ep *ep,
 	int status = req->status;
 
 	/* i/f shutting down */
-	if (!prm->fb_ep_enabled || req->status == -ESHUTDOWN)
+	if (!prm->fb_ep_enabled) {
+		kfree(req->buf);
+		usb_ep_free_request(ep, req);
+		return;
+	}
+
+	if (req->status == -ESHUTDOWN)
 		return;
 
 	/*
@@ -388,8 +414,6 @@ static inline void free_ep(struct uac_rtd_params *prm, struct usb_ep *ep)
 	if (!prm->ep_enabled)
 		return;
 
-	prm->ep_enabled = false;
-
 	audio_dev = uac->audio_dev;
 	params = &audio_dev->params;
 
@@ -407,6 +431,8 @@ static inline void free_ep(struct uac_rtd_params *prm, struct usb_ep *ep)
 		}
 	}
 
+	prm->ep_enabled = false;
+
 	if (usb_ep_disable(ep))
 		dev_err(uac->card->dev, "%s:%d Error!\n", __func__, __LINE__);
 }
@@ -418,15 +444,16 @@ static inline void free_ep_fback(struct uac_rtd_params *prm, struct usb_ep *ep)
 	if (!prm->fb_ep_enabled)
 		return;
 
-	prm->fb_ep_enabled = false;
-
 	if (prm->req_fback) {
-		usb_ep_dequeue(ep, prm->req_fback);
-		kfree(prm->req_fback->buf);
-		usb_ep_free_request(ep, prm->req_fback);
+		if (usb_ep_dequeue(ep, prm->req_fback)) {
+			kfree(prm->req_fback->buf);
+			usb_ep_free_request(ep, prm->req_fback);
+		}
 		prm->req_fback = NULL;
 	}
 
+	prm->fb_ep_enabled = false;
+
 	if (usb_ep_disable(ep))
 		dev_err(uac->card->dev, "%s:%d Error!\n", __func__, __LINE__);
 }
@@ -597,6 +624,103 @@ void u_audio_stop_playback(struct g_audio *audio_dev)
 }
 EXPORT_SYMBOL_GPL(u_audio_stop_playback);
 
+int u_audio_get_volume(struct g_audio *audio_dev, int playback, s16 *val)
+{
+	struct snd_uac_chip *uac = audio_dev->uac;
+	struct uac_rtd_params *prm;
+	unsigned long flags;
+
+	if (playback)
+		prm = &uac->p_prm;
+	else
+		prm = &uac->c_prm;
+
+	spin_lock_irqsave(&prm->lock, flags);
+	*val = prm->volume;
+	spin_unlock_irqrestore(&prm->lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(u_audio_get_volume);
+
+int u_audio_set_volume(struct g_audio *audio_dev, int playback, s16 val)
+{
+	struct snd_uac_chip *uac = audio_dev->uac;
+	struct uac_rtd_params *prm;
+	unsigned long flags;
+	int change = 0;
+
+	if (playback)
+		prm = &uac->p_prm;
+	else
+		prm = &uac->c_prm;
+
+	spin_lock_irqsave(&prm->lock, flags);
+	val = clamp(val, prm->volume_min, prm->volume_max);
+	if (prm->volume != val) {
+		prm->volume = val;
+		change = 1;
+	}
+	spin_unlock_irqrestore(&prm->lock, flags);
+
+	if (change)
+		snd_ctl_notify(uac->card, SNDRV_CTL_EVENT_MASK_VALUE,
+				&prm->snd_kctl_volume->id);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(u_audio_set_volume);
+
+int u_audio_get_mute(struct g_audio *audio_dev, int playback, int *val)
+{
+	struct snd_uac_chip *uac = audio_dev->uac;
+	struct uac_rtd_params *prm;
+	unsigned long flags;
+
+	if (playback)
+		prm = &uac->p_prm;
+	else
+		prm = &uac->c_prm;
+
+	spin_lock_irqsave(&prm->lock, flags);
+	*val = prm->mute;
+	spin_unlock_irqrestore(&prm->lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(u_audio_get_mute);
+
+int u_audio_set_mute(struct g_audio *audio_dev, int playback, int val)
+{
+	struct snd_uac_chip *uac = audio_dev->uac;
+	struct uac_rtd_params *prm;
+	unsigned long flags;
+	int change = 0;
+	int mute;
+
+	if (playback)
+		prm = &uac->p_prm;
+	else
+		prm = &uac->c_prm;
+
+	mute = val ? 1 : 0;
+
+	spin_lock_irqsave(&prm->lock, flags);
+	if (prm->mute != mute) {
+		prm->mute = mute;
+		change = 1;
+	}
+	spin_unlock_irqrestore(&prm->lock, flags);
+
+	if (change)
+		snd_ctl_notify(uac->card, SNDRV_CTL_EVENT_MASK_VALUE,
+			       &prm->snd_kctl_mute->id);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(u_audio_set_mute);
+
+
 static int u_audio_pitch_info(struct snd_kcontrol *kcontrol,
 				   struct snd_ctl_elem_info *uinfo)
 {
@@ -656,14 +780,158 @@ static int u_audio_pitch_put(struct snd_kcontrol *kcontrol,
 	return change;
 }
 
-static const struct snd_kcontrol_new u_audio_controls[]  = {
+static int u_audio_mute_info(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 1;
+	uinfo->value.integer.step = 1;
+
+	return 0;
+}
+
+static int u_audio_mute_get(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_value *ucontrol)
 {
-	.iface =        SNDRV_CTL_ELEM_IFACE_PCM,
-	.name =         "Capture Pitch 1000000",
-	.info =         u_audio_pitch_info,
-	.get =          u_audio_pitch_get,
-	.put =          u_audio_pitch_put,
-},
+	struct uac_rtd_params *prm = snd_kcontrol_chip(kcontrol);
+	unsigned long flags;
+
+	spin_lock_irqsave(&prm->lock, flags);
+	ucontrol->value.integer.value[0] = !prm->mute;
+	spin_unlock_irqrestore(&prm->lock, flags);
+
+	return 0;
+}
+
+static int u_audio_mute_put(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	struct uac_rtd_params *prm = snd_kcontrol_chip(kcontrol);
+	struct snd_uac_chip *uac = prm->uac;
+	struct g_audio *audio_dev = uac->audio_dev;
+	unsigned int val;
+	unsigned long flags;
+	int change = 0;
+
+	val = !ucontrol->value.integer.value[0];
+
+	spin_lock_irqsave(&prm->lock, flags);
+	if (val != prm->mute) {
+		prm->mute = val;
+		change = 1;
+	}
+	spin_unlock_irqrestore(&prm->lock, flags);
+
+	if (change && audio_dev->notify)
+		audio_dev->notify(audio_dev, prm->fu_id, UAC_FU_MUTE);
+
+	return change;
+}
+
+/*
+ * TLV callback for mixer volume controls
+ */
+static int u_audio_volume_tlv(struct snd_kcontrol *kcontrol, int op_flag,
+			 unsigned int size, unsigned int __user *_tlv)
+{
+	struct uac_rtd_params *prm = snd_kcontrol_chip(kcontrol);
+	DECLARE_TLV_DB_MINMAX(scale, 0, 0);
+
+	if (size < sizeof(scale))
+		return -ENOMEM;
+
+	/* UAC volume resolution is 1/256 dB, TLV is 1/100 dB */
+	scale[2] = (prm->volume_min * 100) / 256;
+	scale[3] = (prm->volume_max * 100) / 256;
+	if (copy_to_user(_tlv, scale, sizeof(scale)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int u_audio_volume_info(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_info *uinfo)
+{
+	struct uac_rtd_params *prm = snd_kcontrol_chip(kcontrol);
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max =
+		(prm->volume_max - prm->volume_min + prm->volume_res - 1)
+		/ prm->volume_res;
+	uinfo->value.integer.step = 1;
+
+	return 0;
+}
+
+static int u_audio_volume_get(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_value *ucontrol)
+{
+	struct uac_rtd_params *prm = snd_kcontrol_chip(kcontrol);
+	unsigned long flags;
+
+	spin_lock_irqsave(&prm->lock, flags);
+	ucontrol->value.integer.value[0] =
+			(prm->volume - prm->volume_min) / prm->volume_res;
+	spin_unlock_irqrestore(&prm->lock, flags);
+
+	return 0;
+}
+
+static int u_audio_volume_put(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	struct uac_rtd_params *prm = snd_kcontrol_chip(kcontrol);
+	struct snd_uac_chip *uac = prm->uac;
+	struct g_audio *audio_dev = uac->audio_dev;
+	unsigned int val;
+	s16 volume;
+	unsigned long flags;
+	int change = 0;
+
+	val = ucontrol->value.integer.value[0];
+
+	spin_lock_irqsave(&prm->lock, flags);
+	volume = (val * prm->volume_res) + prm->volume_min;
+	volume = clamp(volume, prm->volume_min, prm->volume_max);
+	if (volume != prm->volume) {
+		prm->volume = volume;
+		change = 1;
+	}
+	spin_unlock_irqrestore(&prm->lock, flags);
+
+	if (change && audio_dev->notify)
+		audio_dev->notify(audio_dev, prm->fu_id, UAC_FU_VOLUME);
+
+	return change;
+}
+
+
+static struct snd_kcontrol_new u_audio_controls[]  = {
+  [UAC_FBACK_CTRL] {
+    .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
+    .name =         "Capture Pitch 1000000",
+    .info =         u_audio_pitch_info,
+    .get =          u_audio_pitch_get,
+    .put =          u_audio_pitch_put,
+  },
+  [UAC_MUTE_CTRL] {
+		.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
+		.name =		"", /* will be filled later */
+		.info =		u_audio_mute_info,
+		.get =		u_audio_mute_get,
+		.put =		u_audio_mute_put,
+	},
+	[UAC_VOLUME_CTRL] {
+		.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
+		.name =		"", /* will be filled later */
+		.info =		u_audio_volume_info,
+		.get =		u_audio_volume_get,
+		.put =		u_audio_volume_put,
+	},
 };
 
 int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
@@ -675,7 +943,7 @@ int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
 	struct snd_kcontrol *kctl;
 	struct uac_params *params;
 	int p_chmask, c_chmask;
-	int err;
+	int i, err;
 
 	if (!g_audio)
 		return -EINVAL;
@@ -693,7 +961,8 @@ int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
 	if (c_chmask) {
 		struct uac_rtd_params *prm = &uac->c_prm;
 
-		uac->c_prm.uac = uac;
+    spin_lock_init(&prm->lock);
+    uac->c_prm.uac = uac;
 		prm->max_psize = g_audio->out_ep_maxpsize;
 
 		prm->reqs = kcalloc(params->req_number,
@@ -716,6 +985,7 @@ int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
 	if (p_chmask) {
 		struct uac_rtd_params *prm = &uac->p_prm;
 
+		spin_lock_init(&prm->lock);
 		uac->p_prm.uac = uac;
 		prm->max_psize = g_audio->in_ep_maxpsize;
 
@@ -760,10 +1030,18 @@ int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &uac_pcm_ops);
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &uac_pcm_ops);
 
-	if (c_chmask && g_audio->in_ep_fback) {
+	/*
+	 * Create mixer and controls
+	 * Create only if it's required on USB side
+	 */
+	if ((c_chmask && g_audio->in_ep_fback)
+			|| (p_chmask && params->p_fu.id)
+			|| (c_chmask && params->c_fu.id))
 		strscpy(card->mixername, card_name, sizeof(card->driver));
 
-		kctl = snd_ctl_new1(&u_audio_controls[0], &uac->c_prm);
+	if (c_chmask && g_audio->in_ep_fback) {
+		kctl = snd_ctl_new1(&u_audio_controls[UAC_FBACK_CTRL],
+				    &uac->c_prm);
 		if (!kctl) {
 			err = -ENOMEM;
 			goto snd_fail;
@@ -777,6 +1055,82 @@ int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
 			goto snd_fail;
 	}
 
+	for (i = 0; i <= SNDRV_PCM_STREAM_LAST; i++) {
+		struct uac_rtd_params *prm;
+		struct uac_fu_params *fu;
+		char ctrl_name[24];
+		char *direction;
+
+		if (!pcm->streams[i].substream_count)
+			continue;
+
+		if (i == SNDRV_PCM_STREAM_PLAYBACK) {
+			prm = &uac->p_prm;
+			fu = &params->p_fu;
+			direction = "Playback";
+		} else {
+			prm = &uac->c_prm;
+			fu = &params->c_fu;
+			direction = "Capture";
+		}
+
+		prm->fu_id = fu->id;
+
+		if (fu->mute_present) {
+			snprintf(ctrl_name, sizeof(ctrl_name),
+					"PCM %s Switch", direction);
+
+			u_audio_controls[UAC_MUTE_CTRL].name = ctrl_name;
+
+			kctl = snd_ctl_new1(&u_audio_controls[UAC_MUTE_CTRL],
+					    prm);
+			if (!kctl) {
+				err = -ENOMEM;
+				goto snd_fail;
+			}
+
+			kctl->id.device = pcm->device;
+			kctl->id.subdevice = i;
+
+			err = snd_ctl_add(card, kctl);
+			if (err < 0)
+				goto snd_fail;
+			prm->snd_kctl_mute = kctl;
+			prm->mute = 0;
+		}
+
+		if (fu->volume_present) {
+			snprintf(ctrl_name, sizeof(ctrl_name),
+					"PCM %s Volume", direction);
+
+			u_audio_controls[UAC_VOLUME_CTRL].name = ctrl_name;
+
+			kctl = snd_ctl_new1(&u_audio_controls[UAC_VOLUME_CTRL],
+					    prm);
+			if (!kctl) {
+				err = -ENOMEM;
+				goto snd_fail;
+			}
+
+			kctl->id.device = pcm->device;
+			kctl->id.subdevice = i;
+
+
+			kctl->tlv.c = u_audio_volume_tlv;
+			kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ |
+					SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
+
+			err = snd_ctl_add(card, kctl);
+			if (err < 0)
+				goto snd_fail;
+			prm->snd_kctl_volume = kctl;
+			prm->volume = fu->volume_max;
+			prm->volume_max = fu->volume_max;
+			prm->volume_min = fu->volume_min;
+			prm->volume_res = fu->volume_res;
+		}
+	}
+
 	strscpy(card->driver, card_name, sizeof(card->driver));
 	strscpy(card->shortname, card_name, sizeof(card->shortname));
 	sprintf(card->longname, "%s %i", card_name, card->dev->id);
diff --git a/drivers/usb/gadget/function/u_audio.h b/drivers/usb/gadget/function/u_audio.h
index a218cdf771fe..001a79a46022 100644
--- a/drivers/usb/gadget/function/u_audio.h
+++ b/drivers/usb/gadget/function/u_audio.h
@@ -19,16 +19,30 @@
  */
 #define FBACK_SLOW_MAX	250
 
+/* Feature Unit parameters */
+struct uac_fu_params {
+	int id;			/* Feature Unit ID */
+
+	bool mute_present;	/* mute control enable */
+
+	bool volume_present;	/* volume control enable */
+	s16 volume_min;		/* min volume in 1/256 dB */
+	s16 volume_max;		/* max volume in 1/256 dB */
+	s16 volume_res;		/* volume resolution in 1/256 dB */
+};
+
 struct uac_params {
 	/* playback */
 	int p_chmask;	/* channel mask */
 	int p_srate;	/* rate in Hz */
 	int p_ssize;	/* sample size */
+	struct uac_fu_params p_fu;	/* Feature Unit parameters */
 
 	/* capture */
 	int c_chmask;	/* channel mask */
 	int c_srate;	/* rate in Hz */
 	int c_ssize;	/* sample size */
+	struct uac_fu_params c_fu;	/* Feature Unit parameters */
 
 	int req_number; /* number of preallocated requests */
 	int fb_max;	/* upper frequency drift feedback limit per-mil */
@@ -49,6 +63,9 @@ struct g_audio {
 	/* Max packet size for all out_ep possible speeds */
 	unsigned int out_ep_maxpsize;
 
+	/* Notify UAC driver about control change */
+	int (*notify)(struct g_audio *g_audio, int unit_id, int cs);
+
 	/* The ALSA Sound Card it represents on the USB-Client side */
 	struct snd_uac_chip *uac;
 
@@ -94,4 +111,9 @@ void u_audio_stop_capture(struct g_audio *g_audio);
 int u_audio_start_playback(struct g_audio *g_audio);
 void u_audio_stop_playback(struct g_audio *g_audio);
 
+int u_audio_get_volume(struct g_audio *g_audio, int playback, s16 *val);
+int u_audio_set_volume(struct g_audio *g_audio, int playback, s16 val);
+int u_audio_get_mute(struct g_audio *g_audio, int playback, int *val);
+int u_audio_set_mute(struct g_audio *g_audio, int playback, int val);
+
 #endif /* __U_AUDIO_H */
diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
index d1d044d9f859..85a3f6d4b5af 100644
--- a/drivers/usb/gadget/function/u_ether.c
+++ b/drivers/usb/gadget/function/u_ether.c
@@ -492,8 +492,9 @@ static netdev_tx_t eth_start_xmit(struct sk_buff *skb,
 	}
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	if (skb && !in) {
-		dev_kfree_skb_any(skb);
+	if (!in) {
+		if (skb)
+			dev_kfree_skb_any(skb);
 		return NETDEV_TX_OK;
 	}
 
diff --git a/drivers/usb/gadget/function/u_hid.h b/drivers/usb/gadget/function/u_hid.h
index 98d6af558c03..84bb70292855 100644
--- a/drivers/usb/gadget/function/u_hid.h
+++ b/drivers/usb/gadget/function/u_hid.h
@@ -20,6 +20,7 @@ struct f_hid_opts {
 	int				minor;
 	unsigned char			subclass;
 	unsigned char			protocol;
+	unsigned char			no_out_endpoint;
 	unsigned short			report_length;
 	unsigned short			report_desc_length;
 	unsigned char			*report_desc;
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 281ca766698a..6f68cbeeee7c 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -1445,51 +1445,53 @@ EXPORT_SYMBOL_GPL(gserial_resume);
 
 static int userial_init(void)
 {
+	struct tty_driver *driver;
 	unsigned			i;
 	int				status;
 
-	gs_tty_driver = alloc_tty_driver(MAX_U_SERIAL_PORTS);
-	if (!gs_tty_driver)
-		return -ENOMEM;
+	driver = tty_alloc_driver(MAX_U_SERIAL_PORTS, TTY_DRIVER_REAL_RAW |
+			TTY_DRIVER_DYNAMIC_DEV);
+	if (IS_ERR(driver))
+		return PTR_ERR(driver);
 
-	gs_tty_driver->driver_name = "g_serial";
-	gs_tty_driver->name = "ttyGS";
+	driver->driver_name = "g_serial";
+	driver->name = "ttyGS";
 	/* uses dynamically assigned dev_t values */
 
-	gs_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
-	gs_tty_driver->subtype = SERIAL_TYPE_NORMAL;
-	gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-	gs_tty_driver->init_termios = tty_std_termios;
+	driver->type = TTY_DRIVER_TYPE_SERIAL;
+	driver->subtype = SERIAL_TYPE_NORMAL;
+	driver->init_termios = tty_std_termios;
 
 	/* 9600-8-N-1 ... matches defaults expected by "usbser.sys" on
 	 * MS-Windows.  Otherwise, most of these flags shouldn't affect
 	 * anything unless we were to actually hook up to a serial line.
 	 */
-	gs_tty_driver->init_termios.c_cflag =
+	driver->init_termios.c_cflag =
 			B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-	gs_tty_driver->init_termios.c_ispeed = 9600;
-	gs_tty_driver->init_termios.c_ospeed = 9600;
+	driver->init_termios.c_ispeed = 9600;
+	driver->init_termios.c_ospeed = 9600;
 
-	tty_set_operations(gs_tty_driver, &gs_tty_ops);
+	tty_set_operations(driver, &gs_tty_ops);
 	for (i = 0; i < MAX_U_SERIAL_PORTS; i++)
 		mutex_init(&ports[i].lock);
 
 	/* export the driver ... */
-	status = tty_register_driver(gs_tty_driver);
+	status = tty_register_driver(driver);
 	if (status) {
 		pr_err("%s: cannot register, err %d\n",
 				__func__, status);
 		goto fail;
 	}
 
+	gs_tty_driver = driver;
+
 	pr_debug("%s: registered %d ttyGS* device%s\n", __func__,
 			MAX_U_SERIAL_PORTS,
 			(MAX_U_SERIAL_PORTS == 1) ? "" : "s");
 
 	return status;
 fail:
-	put_tty_driver(gs_tty_driver);
-	gs_tty_driver = NULL;
+	tty_driver_kref_put(driver);
 	return status;
 }
 module_init(userial_init);
@@ -1497,7 +1499,7 @@ module_init(userial_init);
 static void userial_cleanup(void)
 {
 	tty_unregister_driver(gs_tty_driver);
-	put_tty_driver(gs_tty_driver);
+	tty_driver_kref_put(gs_tty_driver);
 	gs_tty_driver = NULL;
 }
 module_exit(userial_cleanup);
diff --git a/drivers/usb/gadget/function/u_uac1.h b/drivers/usb/gadget/function/u_uac1.h
index 39c0e29e1b46..589fae861141 100644
--- a/drivers/usb/gadget/function/u_uac1.h
+++ b/drivers/usb/gadget/function/u_uac1.h
@@ -18,6 +18,13 @@
 #define UAC1_DEF_PSRATE		48000
 #define UAC1_DEF_PSSIZE		2
 #define UAC1_DEF_REQ_NUM	2
+#define UAC1_DEF_INT_REQ_NUM	10
+
+#define UAC1_DEF_MUTE_PRESENT	1
+#define UAC1_DEF_VOLUME_PRESENT 1
+#define UAC1_DEF_MIN_DB		(-100*256)	/* -100 dB */
+#define UAC1_DEF_MAX_DB		0		/* 0 dB */
+#define UAC1_DEF_RES_DB		(1*256)	/* 1 dB */
 
 
 struct f_uac1_opts {
@@ -28,6 +35,19 @@ struct f_uac1_opts {
 	int				p_chmask;
 	int				p_srate;
 	int				p_ssize;
+
+	bool			p_mute_present;
+	bool			p_volume_present;
+	s16				p_volume_min;
+	s16				p_volume_max;
+	s16				p_volume_res;
+
+	bool			c_mute_present;
+	bool			c_volume_present;
+	s16				c_volume_min;
+	s16				c_volume_max;
+	s16				c_volume_res;
+
 	int				req_number;
 	unsigned			bound:1;
 
diff --git a/drivers/usb/gadget/function/u_uac2.h b/drivers/usb/gadget/function/u_uac2.h
index 179d3ef6a195..a73b35774c44 100644
--- a/drivers/usb/gadget/function/u_uac2.h
+++ b/drivers/usb/gadget/function/u_uac2.h
@@ -22,8 +22,16 @@
 #define UAC2_DEF_CSRATE 64000
 #define UAC2_DEF_CSSIZE 2
 #define UAC2_DEF_CSYNC		USB_ENDPOINT_SYNC_ASYNC
+
+#define UAC2_DEF_MUTE_PRESENT	1
+#define UAC2_DEF_VOLUME_PRESENT 1
+#define UAC2_DEF_MIN_DB		(-100*256)	/* -100 dB */
+#define UAC2_DEF_MAX_DB		0		/* 0 dB */
+#define UAC2_DEF_RES_DB		(1*256)		/* 1 dB */
+
 #define UAC2_DEF_REQ_NUM 2
 #define UAC2_DEF_FB_MAX 5
+#define UAC2_DEF_INT_REQ_NUM	10
 
 struct f_uac2_opts {
 	struct usb_function_instance	func_inst;
@@ -34,9 +42,22 @@ struct f_uac2_opts {
 	int				c_srate;
 	int				c_ssize;
 	int				c_sync;
+
+	bool			p_mute_present;
+	bool			p_volume_present;
+	s16				p_volume_min;
+	s16				p_volume_max;
+	s16				p_volume_res;
+
+	bool			c_mute_present;
+	bool			c_volume_present;
+	s16				c_volume_min;
+	s16				c_volume_max;
+	s16				c_volume_res;
+
 	int				req_number;
 	int				fb_max;
-	bool				bound;
+	bool			bound;
 
 	struct mutex			lock;
 	int				refcnt;
diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h
index 23ee25383c1f..255a61bd6a6a 100644
--- a/drivers/usb/gadget/function/uvc.h
+++ b/drivers/usb/gadget/function/uvc.h
@@ -65,13 +65,19 @@ extern unsigned int uvc_gadget_trace_param;
  * Driver specific constants
  */
 
-#define UVC_NUM_REQUESTS			4
 #define UVC_MAX_REQUEST_SIZE			64
 #define UVC_MAX_EVENTS				4
 
 /* ------------------------------------------------------------------------
  * Structures
  */
+struct uvc_request {
+	struct usb_request *req;
+	u8 *req_buffer;
+	struct uvc_video *video;
+	struct sg_table sgt;
+	u8 header[2];
+};
 
 struct uvc_video {
 	struct uvc_device *uvc;
@@ -87,13 +93,16 @@ struct uvc_video {
 	unsigned int imagesize;
 	struct mutex mutex;	/* protects frame parameters */
 
+	unsigned int uvc_num_requests;
+
 	/* Requests */
 	unsigned int req_size;
-	struct usb_request *req[UVC_NUM_REQUESTS];
-	__u8 *req_buffer[UVC_NUM_REQUESTS];
+	struct uvc_request *ureq;
 	struct list_head req_free;
 	spinlock_t req_lock;
 
+	unsigned int req_int_count;
+
 	void (*encode) (struct usb_request *req, struct uvc_video *video,
 			struct uvc_buffer *buf);
 
diff --git a/drivers/usb/gadget/function/uvc_queue.c b/drivers/usb/gadget/function/uvc_queue.c
index 61e2c94cc0b0..7d00ad7c154c 100644
--- a/drivers/usb/gadget/function/uvc_queue.c
+++ b/drivers/usb/gadget/function/uvc_queue.c
@@ -17,6 +17,7 @@
 #include <linux/wait.h>
 
 #include <media/v4l2-common.h>
+#include <media/videobuf2-dma-sg.h>
 #include <media/videobuf2-vmalloc.h>
 
 #include "uvc.h"
@@ -43,6 +44,7 @@ static int uvc_queue_setup(struct vb2_queue *vq,
 {
 	struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
 	struct uvc_video *video = container_of(queue, struct uvc_video, queue);
+	struct usb_composite_dev *cdev = video->uvc->func.config->cdev;
 
 	if (*nbuffers > UVC_MAX_VIDEO_BUFFERS)
 		*nbuffers = UVC_MAX_VIDEO_BUFFERS;
@@ -51,6 +53,11 @@ static int uvc_queue_setup(struct vb2_queue *vq,
 
 	sizes[0] = video->imagesize;
 
+	if (cdev->gadget->speed < USB_SPEED_SUPER)
+		video->uvc_num_requests = 4;
+	else
+		video->uvc_num_requests = 64;
+
 	return 0;
 }
 
@@ -70,7 +77,12 @@ static int uvc_buffer_prepare(struct vb2_buffer *vb)
 		return -ENODEV;
 
 	buf->state = UVC_BUF_STATE_QUEUED;
-	buf->mem = vb2_plane_vaddr(vb, 0);
+	if (queue->use_sg) {
+		buf->sgt = vb2_dma_sg_plane_desc(vb, 0);
+		buf->sg = buf->sgt->sgl;
+	} else {
+		buf->mem = vb2_plane_vaddr(vb, 0);
+	}
 	buf->length = vb2_plane_size(vb, 0);
 	if (vb->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 		buf->bytesused = 0;
@@ -110,9 +122,11 @@ static const struct vb2_ops uvc_queue_qops = {
 	.wait_finish = vb2_ops_wait_finish,
 };
 
-int uvcg_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
+int uvcg_queue_init(struct uvc_video_queue *queue, struct device *dev, enum v4l2_buf_type type,
 		    struct mutex *lock)
 {
+	struct uvc_video *video = container_of(queue, struct uvc_video, queue);
+	struct usb_composite_dev *cdev = video->uvc->func.config->cdev;
 	int ret;
 
 	queue->queue.type = type;
@@ -121,9 +135,17 @@ int uvcg_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
 	queue->queue.buf_struct_size = sizeof(struct uvc_buffer);
 	queue->queue.ops = &uvc_queue_qops;
 	queue->queue.lock = lock;
-	queue->queue.mem_ops = &vb2_vmalloc_memops;
+	if (cdev->gadget->sg_supported) {
+		queue->queue.mem_ops = &vb2_dma_sg_memops;
+		queue->use_sg = 1;
+	} else {
+		queue->queue.mem_ops = &vb2_vmalloc_memops;
+	}
+
 	queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
 				     | V4L2_BUF_FLAG_TSTAMP_SRC_EOF;
+	queue->queue.dev = dev;
+
 	ret = vb2_queue_init(&queue->queue);
 	if (ret)
 		return ret;
diff --git a/drivers/usb/gadget/function/uvc_queue.h b/drivers/usb/gadget/function/uvc_queue.h
index 2f0fff769843..05360a0767f6 100644
--- a/drivers/usb/gadget/function/uvc_queue.h
+++ b/drivers/usb/gadget/function/uvc_queue.h
@@ -34,6 +34,9 @@ struct uvc_buffer {
 
 	enum uvc_buffer_state state;
 	void *mem;
+	struct sg_table *sgt;
+	struct scatterlist *sg;
+	unsigned int offset;
 	unsigned int length;
 	unsigned int bytesused;
 };
@@ -50,6 +53,8 @@ struct uvc_video_queue {
 
 	unsigned int buf_used;
 
+	bool use_sg;
+
 	spinlock_t irqlock;	/* Protects flags and irqqueue */
 	struct list_head irqqueue;
 };
@@ -59,7 +64,7 @@ static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
 	return vb2_is_streaming(&queue->queue);
 }
 
-int uvcg_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
+int uvcg_queue_init(struct uvc_video_queue *queue, struct device *dev, enum v4l2_buf_type type,
 		    struct mutex *lock);
 
 void uvcg_free_buffers(struct uvc_video_queue *queue);
diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c
index 633e23d58d86..b4a763e5f70e 100644
--- a/drivers/usb/gadget/function/uvc_video.c
+++ b/drivers/usb/gadget/function/uvc_video.c
@@ -27,10 +27,10 @@ static int
 uvc_video_encode_header(struct uvc_video *video, struct uvc_buffer *buf,
 		u8 *data, int len)
 {
-	data[0] = 2;
+	data[0] = UVCG_REQUEST_HEADER_LEN;
 	data[1] = UVC_STREAM_EOH | video->fid;
 
-	if (buf->bytesused - video->queue.buf_used <= len - 2)
+	if (buf->bytesused - video->queue.buf_used <= len - UVCG_REQUEST_HEADER_LEN)
 		data[1] |= UVC_STREAM_EOF;
 
 	return 2;
@@ -95,6 +95,71 @@ uvc_video_encode_bulk(struct usb_request *req, struct uvc_video *video,
 }
 
 static void
+uvc_video_encode_isoc_sg(struct usb_request *req, struct uvc_video *video,
+		struct uvc_buffer *buf)
+{
+	unsigned int pending = buf->bytesused - video->queue.buf_used;
+	struct uvc_request *ureq = req->context;
+	struct scatterlist *sg, *iter;
+	unsigned int len = video->req_size;
+	unsigned int sg_left, part = 0;
+	unsigned int i;
+	int ret;
+
+	sg = ureq->sgt.sgl;
+	sg_init_table(sg, ureq->sgt.nents);
+
+	/* Init the header. */
+	ret = uvc_video_encode_header(video, buf, ureq->header,
+				      video->req_size);
+	sg_set_buf(sg, ureq->header, UVCG_REQUEST_HEADER_LEN);
+	len -= ret;
+
+	if (pending <= len)
+		len = pending;
+
+	req->length = (len == pending) ?
+		len + UVCG_REQUEST_HEADER_LEN : video->req_size;
+
+	/* Init the pending sgs with payload */
+	sg = sg_next(sg);
+
+	for_each_sg(sg, iter, ureq->sgt.nents - 1, i) {
+		if (!len || !buf->sg)
+			break;
+
+		sg_left = sg_dma_len(buf->sg) - buf->offset;
+		part = min_t(unsigned int, len, sg_left);
+
+		sg_set_page(iter, sg_page(buf->sg), part, buf->offset);
+
+		if (part == sg_left) {
+			buf->offset = 0;
+			buf->sg = sg_next(buf->sg);
+		} else {
+			buf->offset += part;
+		}
+		len -= part;
+	}
+
+	/* Assign the video data with header. */
+	req->buf = NULL;
+	req->sg	= ureq->sgt.sgl;
+	req->num_sgs = i + 1;
+
+	req->length -= len;
+	video->queue.buf_used += req->length - UVCG_REQUEST_HEADER_LEN;
+
+	if (buf->bytesused == video->queue.buf_used || !buf->sg) {
+		video->queue.buf_used = 0;
+		buf->state = UVC_BUF_STATE_DONE;
+		buf->offset = 0;
+		uvcg_queue_next_buffer(&video->queue, buf);
+		video->fid ^= UVC_STREAM_FID;
+	}
+}
+
+static void
 uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video,
 		struct uvc_buffer *buf)
 {
@@ -145,7 +210,8 @@ static int uvcg_video_ep_queue(struct uvc_video *video, struct usb_request *req)
 static void
 uvc_video_complete(struct usb_ep *ep, struct usb_request *req)
 {
-	struct uvc_video *video = req->context;
+	struct uvc_request *ureq = req->context;
+	struct uvc_video *video = ureq->video;
 	struct uvc_video_queue *queue = &video->queue;
 	unsigned long flags;
 
@@ -177,16 +243,23 @@ uvc_video_free_requests(struct uvc_video *video)
 {
 	unsigned int i;
 
-	for (i = 0; i < UVC_NUM_REQUESTS; ++i) {
-		if (video->req[i]) {
-			usb_ep_free_request(video->ep, video->req[i]);
-			video->req[i] = NULL;
-		}
+	if (video->ureq) {
+		for (i = 0; i < video->uvc_num_requests; ++i) {
+			sg_free_table(&video->ureq[i].sgt);
+
+			if (video->ureq[i].req) {
+				usb_ep_free_request(video->ep, video->ureq[i].req);
+				video->ureq[i].req = NULL;
+			}
 
-		if (video->req_buffer[i]) {
-			kfree(video->req_buffer[i]);
-			video->req_buffer[i] = NULL;
+			if (video->ureq[i].req_buffer) {
+				kfree(video->ureq[i].req_buffer);
+				video->ureq[i].req_buffer = NULL;
+			}
 		}
+
+		kfree(video->ureq);
+		video->ureq = NULL;
 	}
 
 	INIT_LIST_HEAD(&video->req_free);
@@ -207,21 +280,30 @@ uvc_video_alloc_requests(struct uvc_video *video)
 		 * max_t(unsigned int, video->ep->maxburst, 1)
 		 * (video->ep->mult);
 
-	for (i = 0; i < UVC_NUM_REQUESTS; ++i) {
-		video->req_buffer[i] = kmalloc(req_size, GFP_KERNEL);
-		if (video->req_buffer[i] == NULL)
-			goto error;
+	video->ureq = kcalloc(video->uvc_num_requests, sizeof(struct uvc_request), GFP_KERNEL);
+	if (video->ureq == NULL)
+		return -ENOMEM;
 
-		video->req[i] = usb_ep_alloc_request(video->ep, GFP_KERNEL);
-		if (video->req[i] == NULL)
+	for (i = 0; i < video->uvc_num_requests; ++i) {
+		video->ureq[i].req_buffer = kmalloc(req_size, GFP_KERNEL);
+		if (video->ureq[i].req_buffer == NULL)
 			goto error;
 
-		video->req[i]->buf = video->req_buffer[i];
-		video->req[i]->length = 0;
-		video->req[i]->complete = uvc_video_complete;
-		video->req[i]->context = video;
+		video->ureq[i].req = usb_ep_alloc_request(video->ep, GFP_KERNEL);
+		if (video->ureq[i].req == NULL)
+			goto error;
 
-		list_add_tail(&video->req[i]->list, &video->req_free);
+		video->ureq[i].req->buf = video->ureq[i].req_buffer;
+		video->ureq[i].req->length = 0;
+		video->ureq[i].req->complete = uvc_video_complete;
+		video->ureq[i].req->context = &video->ureq[i];
+		video->ureq[i].video = video;
+
+		list_add_tail(&video->ureq[i].req->list, &video->req_free);
+		/* req_size/PAGE_SIZE + 1 for overruns and + 1 for header */
+		sg_alloc_table(&video->ureq[i].sgt,
+			       DIV_ROUND_UP(req_size - 2, PAGE_SIZE) + 2,
+			       GFP_KERNEL);
 	}
 
 	video->req_size = req_size;
@@ -278,6 +360,19 @@ static void uvcg_video_pump(struct work_struct *work)
 
 		video->encode(req, video, buf);
 
+		/* With usb3 we have more requests. This will decrease the
+		 * interrupt load to a quarter but also catches the corner
+		 * cases, which needs to be handled */
+		if (list_empty(&video->req_free) ||
+		    buf->state == UVC_BUF_STATE_DONE ||
+		    !(video->req_int_count %
+		       DIV_ROUND_UP(video->uvc_num_requests, 4))) {
+			video->req_int_count = 0;
+			req->no_interrupt = 0;
+		} else {
+			req->no_interrupt = 1;
+		}
+
 		/* Queue the USB request */
 		ret = uvcg_video_ep_queue(video, req);
 		spin_unlock_irqrestore(&queue->irqlock, flags);
@@ -286,6 +381,7 @@ static void uvcg_video_pump(struct work_struct *work)
 			uvcg_queue_cancel(queue, 0);
 			break;
 		}
+		video->req_int_count++;
 	}
 
 	spin_lock_irqsave(&video->req_lock, flags);
@@ -312,9 +408,9 @@ int uvcg_video_enable(struct uvc_video *video, int enable)
 		cancel_work_sync(&video->pump);
 		uvcg_queue_cancel(&video->queue, 0);
 
-		for (i = 0; i < UVC_NUM_REQUESTS; ++i)
-			if (video->req[i])
-				usb_ep_dequeue(video->ep, video->req[i]);
+		for (i = 0; i < video->uvc_num_requests; ++i)
+			if (video->ureq && video->ureq[i].req)
+				usb_ep_dequeue(video->ep, video->ureq[i].req);
 
 		uvc_video_free_requests(video);
 		uvcg_queue_enable(&video->queue, 0);
@@ -331,7 +427,10 @@ int uvcg_video_enable(struct uvc_video *video, int enable)
 		video->encode = uvc_video_encode_bulk;
 		video->payload_size = 0;
 	} else
-		video->encode = uvc_video_encode_isoc;
+		video->encode = video->queue.use_sg ?
+			uvc_video_encode_isoc_sg : uvc_video_encode_isoc;
+
+	video->req_int_count = 0;
 
 	schedule_work(&video->pump);
 
@@ -355,8 +454,8 @@ int uvcg_video_init(struct uvc_video *video, struct uvc_device *uvc)
 	video->imagesize = 320 * 240 * 2;
 
 	/* Initialize the video buffers queue. */
-	uvcg_queue_init(&video->queue, V4L2_BUF_TYPE_VIDEO_OUTPUT,
-			&video->mutex);
+	uvcg_queue_init(&video->queue, uvc->v4l2_dev.dev->parent,
+			V4L2_BUF_TYPE_VIDEO_OUTPUT, &video->mutex);
 	return 0;
 }
 
diff --git a/drivers/usb/gadget/function/uvc_video.h b/drivers/usb/gadget/function/uvc_video.h
index 03adeefa343b..9bf19475f6f9 100644
--- a/drivers/usb/gadget/function/uvc_video.h
+++ b/drivers/usb/gadget/function/uvc_video.h
@@ -12,6 +12,8 @@
 #ifndef __UVC_VIDEO_H__
 #define __UVC_VIDEO_H__
 
+#define UVCG_REQUEST_HEADER_LEN			2
+
 struct uvc_video;
 
 int uvcg_video_enable(struct uvc_video *video, int enable);
diff --git a/drivers/usb/gadget/legacy/Kconfig b/drivers/usb/gadget/legacy/Kconfig
index 11dd6e8adc8a..de6668e58481 100644
--- a/drivers/usb/gadget/legacy/Kconfig
+++ b/drivers/usb/gadget/legacy/Kconfig
@@ -502,6 +502,7 @@ config USB_G_WEBCAM
 	tristate "USB Webcam Gadget"
 	depends on VIDEO_V4L2
 	select USB_LIBCOMPOSITE
+	select VIDEOBUF2_DMA_SG
 	select VIDEOBUF2_VMALLOC
 	select USB_F_UVC
 	help
diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index cd8e2737947b..539220d7f5b6 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -1214,8 +1214,8 @@ dev_release (struct inode *inode, struct file *fd)
 static __poll_t
 ep0_poll (struct file *fd, poll_table *wait)
 {
-       struct dev_data         *dev = fd->private_data;
-       __poll_t                mask = 0;
+	struct dev_data         *dev = fd->private_data;
+	__poll_t                mask = 0;
 
 	if (dev->state <= STATE_DEV_OPENED)
 		return DEFAULT_POLLMASK;
diff --git a/drivers/usb/gadget/legacy/printer.c b/drivers/usb/gadget/legacy/printer.c
index 2cd389575084..ed762ba9b629 100644
--- a/drivers/usb/gadget/legacy/printer.c
+++ b/drivers/usb/gadget/legacy/printer.c
@@ -50,6 +50,7 @@ MODULE_PARM_DESC(iPNPstring, "MFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;");
 /* Number of requests to allocate per endpoint, not used for ep0. */
 static unsigned qlen = 10;
 module_param(qlen, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(qlen, "The number of 8k buffers to use per endpoint");
 
 #define QLEN	qlen
 
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c
index d11d3d14313f..7a635c499777 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
@@ -5,11 +5,6 @@
  * core.c - Top level support
  *
  * Copyright 2017 IBM Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
index d268306a7bfe..d918e8b2af3c 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/dev.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
@@ -5,11 +5,6 @@
  * dev.c - Individual device/gadget management (ie, a port = a gadget)
  *
  * Copyright 2017 IBM Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
index 022b777b85f8..74ea36c19b1e 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
@@ -5,11 +5,6 @@
  * ep0.c - Endpoint 0 handling
  *
  * Copyright 2017 IBM Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
index cb164c615e6f..917892ca8753 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
@@ -5,11 +5,6 @@
  * epn.c - Generic endpoints management
  *
  * Copyright 2017 IBM Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
index 5c7dea5e0ff1..b9960fdd8a51 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
@@ -5,11 +5,6 @@
  * hub.c - virtual hub handling
  *
  * Copyright 2017 IBM Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/usb/gadget/udc/at91_udc.c b/drivers/usb/gadget/udc/at91_udc.c
index eede5cedacb4..d9ad9adf7348 100644
--- a/drivers/usb/gadget/udc/at91_udc.c
+++ b/drivers/usb/gadget/udc/at91_udc.c
@@ -1876,7 +1876,9 @@ static int at91udc_probe(struct platform_device *pdev)
 	clk_disable(udc->iclk);
 
 	/* request UDC and maybe VBUS irqs */
-	udc->udp_irq = platform_get_irq(pdev, 0);
+	udc->udp_irq = retval = platform_get_irq(pdev, 0);
+	if (retval < 0)
+		goto err_unprepare_iclk;
 	retval = devm_request_irq(dev, udc->udp_irq, at91_udc_irq, 0,
 				  driver_name, udc);
 	if (retval) {
diff --git a/drivers/usb/gadget/udc/bdc/bdc_cmd.c b/drivers/usb/gadget/udc/bdc/bdc_cmd.c
index 995f79c79f96..67887316a1a6 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_cmd.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_cmd.c
@@ -153,7 +153,6 @@ int bdc_config_ep(struct bdc *bdc, struct bdc_ep *ep)
 	si = clamp_val(si, 1, 16) - 1;
 
 	mps = usb_endpoint_maxp(desc);
-	mps &= 0x7ff;
 	param2 |= mps << MP_SHIFT;
 	param2 |= usb_endpoint_type(desc) << EPT_SHIFT;
 
diff --git a/drivers/usb/gadget/udc/bdc/bdc_core.c b/drivers/usb/gadget/udc/bdc/bdc_core.c
index 0bef6b3f049b..fa1a3908ec3b 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_core.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_core.c
@@ -488,27 +488,14 @@ static int bdc_probe(struct platform_device *pdev)
 	int irq;
 	u32 temp;
 	struct device *dev = &pdev->dev;
-	struct clk *clk;
 	int phy_num;
 
 	dev_dbg(dev, "%s()\n", __func__);
 
-	clk = devm_clk_get_optional(dev, "sw_usbd");
-	if (IS_ERR(clk))
-		return PTR_ERR(clk);
-
-	ret = clk_prepare_enable(clk);
-	if (ret) {
-		dev_err(dev, "could not enable clock\n");
-		return ret;
-	}
-
 	bdc = devm_kzalloc(dev, sizeof(*bdc), GFP_KERNEL);
 	if (!bdc)
 		return -ENOMEM;
 
-	bdc->clk = clk;
-
 	bdc->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(bdc->regs))
 		return PTR_ERR(bdc->regs);
@@ -545,10 +532,20 @@ static int bdc_probe(struct platform_device *pdev)
 		}
 	}
 
+	bdc->clk = devm_clk_get_optional(dev, "sw_usbd");
+	if (IS_ERR(bdc->clk))
+		return PTR_ERR(bdc->clk);
+
+	ret = clk_prepare_enable(bdc->clk);
+	if (ret) {
+		dev_err(dev, "could not enable clock\n");
+		return ret;
+	}
+
 	ret = bdc_phy_init(bdc);
 	if (ret) {
 		dev_err(bdc->dev, "BDC phy init failure:%d\n", ret);
-		return ret;
+		goto disable_clk;
 	}
 
 	temp = bdc_readl(bdc->regs, BDC_BDCCAP1);
@@ -560,7 +557,8 @@ static int bdc_probe(struct platform_device *pdev)
 		if (ret) {
 			dev_err(dev,
 				"No suitable DMA config available, abort\n");
-			return -ENOTSUPP;
+			ret = -ENOTSUPP;
+			goto phycleanup;
 		}
 		dev_dbg(dev, "Using 32-bit address\n");
 	}
@@ -580,6 +578,8 @@ cleanup:
 	bdc_hw_exit(bdc);
 phycleanup:
 	bdc_phy_exit(bdc);
+disable_clk:
+	clk_disable_unprepare(bdc->clk);
 	return ret;
 }
 
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index b7f0b1ebaaa8..14fdf918ecfe 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1003,6 +1003,25 @@ int usb_gadget_ep_match_desc(struct usb_gadget *gadget,
 }
 EXPORT_SYMBOL_GPL(usb_gadget_ep_match_desc);
 
+/**
+ * usb_gadget_check_config - checks if the UDC can support the binded
+ *	configuration
+ * @gadget: controller to check the USB configuration
+ *
+ * Ensure that a UDC is able to support the requested resources by a
+ * configuration, and that there are no resource limitations, such as
+ * internal memory allocated to all requested endpoints.
+ *
+ * Returns zero on success, else a negative errno.
+ */
+int usb_gadget_check_config(struct usb_gadget *gadget)
+{
+	if (gadget->ops->check_config)
+		return gadget->ops->check_config(gadget);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_check_config);
+
 /* ------------------------------------------------------------------------- */
 
 static void usb_gadget_state_work(struct work_struct *work)
diff --git a/drivers/usb/gadget/udc/max3420_udc.c b/drivers/usb/gadget/udc/max3420_udc.c
index 34f4db554977..d2a2b20cc1ad 100644
--- a/drivers/usb/gadget/udc/max3420_udc.c
+++ b/drivers/usb/gadget/udc/max3420_udc.c
@@ -1255,12 +1255,14 @@ static int max3420_probe(struct spi_device *spi)
 	err = devm_request_irq(&spi->dev, irq, max3420_irq_handler, 0,
 			       "max3420", udc);
 	if (err < 0)
-		return err;
+		goto del_gadget;
 
 	udc->thread_task = kthread_create(max3420_thread, udc,
 					  "max3420-thread");
-	if (IS_ERR(udc->thread_task))
-		return PTR_ERR(udc->thread_task);
+	if (IS_ERR(udc->thread_task)) {
+		err = PTR_ERR(udc->thread_task);
+		goto del_gadget;
+	}
 
 	irq = of_irq_get_byname(spi->dev.of_node, "vbus");
 	if (irq <= 0) { /* no vbus irq implies self-powered design */
@@ -1280,10 +1282,14 @@ static int max3420_probe(struct spi_device *spi)
 		err = devm_request_irq(&spi->dev, irq,
 				       max3420_vbus_handler, 0, "vbus", udc);
 		if (err < 0)
-			return err;
+			goto del_gadget;
 	}
 
 	return 0;
+
+del_gadget:
+	usb_del_gadget_udc(&udc->gadget);
+	return err;
 }
 
 static int max3420_remove(struct spi_device *spi)
diff --git a/drivers/usb/gadget/udc/mv_u3d_core.c b/drivers/usb/gadget/udc/mv_u3d_core.c
index ce3d7a3eb7e3..a1057ddfbda3 100644
--- a/drivers/usb/gadget/udc/mv_u3d_core.c
+++ b/drivers/usb/gadget/udc/mv_u3d_core.c
@@ -1921,14 +1921,6 @@ static int mv_u3d_probe(struct platform_device *dev)
 		goto err_get_irq;
 	}
 	u3d->irq = r->start;
-	if (request_irq(u3d->irq, mv_u3d_irq,
-		IRQF_SHARED, driver_name, u3d)) {
-		u3d->irq = 0;
-		dev_err(&dev->dev, "Request irq %d for u3d failed\n",
-			u3d->irq);
-		retval = -ENODEV;
-		goto err_request_irq;
-	}
 
 	/* initialize gadget structure */
 	u3d->gadget.ops = &mv_u3d_ops;	/* usb_gadget_ops */
@@ -1941,6 +1933,15 @@ static int mv_u3d_probe(struct platform_device *dev)
 
 	mv_u3d_eps_init(u3d);
 
+	if (request_irq(u3d->irq, mv_u3d_irq,
+		IRQF_SHARED, driver_name, u3d)) {
+		u3d->irq = 0;
+		dev_err(&dev->dev, "Request irq %d for u3d failed\n",
+			u3d->irq);
+		retval = -ENODEV;
+		goto err_request_irq;
+	}
+
 	/* external vbus detection */
 	if (u3d->vbus) {
 		u3d->clock_gating = 1;
@@ -1964,8 +1965,8 @@ static int mv_u3d_probe(struct platform_device *dev)
 
 err_unregister:
 	free_irq(u3d->irq, u3d);
-err_request_irq:
 err_get_irq:
+err_request_irq:
 	kfree(u3d->status_req);
 err_alloc_status_req:
 	kfree(u3d->eps);
diff --git a/drivers/usb/gadget/udc/pxa25x_udc.c b/drivers/usb/gadget/udc/pxa25x_udc.c
index 69ef1e669d0c..a09ec1d826b2 100644
--- a/drivers/usb/gadget/udc/pxa25x_udc.c
+++ b/drivers/usb/gadget/udc/pxa25x_udc.c
@@ -1093,7 +1093,7 @@ static void pxa25x_ep_fifo_flush(struct usb_ep *_ep)
 }
 
 
-static struct usb_ep_ops pxa25x_ep_ops = {
+static const struct usb_ep_ops pxa25x_ep_ops = {
 	.enable		= pxa25x_ep_enable,
 	.disable	= pxa25x_ep_disable,
 
diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c
index f1b35a39d1ba..57d417a7c3e0 100644
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -2707,10 +2707,15 @@ static const struct renesas_usb3_priv renesas_usb3_priv_r8a77990 = {
 
 static const struct of_device_id usb3_of_match[] = {
 	{
+		.compatible = "renesas,r8a774c0-usb3-peri",
+		.data = &renesas_usb3_priv_r8a77990,
+	}, {
 		.compatible = "renesas,r8a7795-usb3-peri",
 		.data = &renesas_usb3_priv_gen3,
-	},
-	{
+	}, {
+		.compatible = "renesas,r8a77990-usb3-peri",
+		.data = &renesas_usb3_priv_r8a77990,
+	}, {
 		.compatible = "renesas,rcar-gen3-usb3-peri",
 		.data = &renesas_usb3_priv_gen3,
 	},
@@ -2720,17 +2725,9 @@ MODULE_DEVICE_TABLE(of, usb3_of_match);
 
 static const struct soc_device_attribute renesas_usb3_quirks_match[] = {
 	{
-		.soc_id = "r8a774c0",
-		.data = &renesas_usb3_priv_r8a77990,
-	},
-	{
 		.soc_id = "r8a7795", .revision = "ES1.*",
 		.data = &renesas_usb3_priv_r8a7795_es1,
 	},
-	{
-		.soc_id = "r8a77990",
-		.data = &renesas_usb3_priv_r8a77990,
-	},
 	{ /* sentinel */ },
 };
 
diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c
index 179777cb699f..e3931da24277 100644
--- a/drivers/usb/gadget/udc/s3c2410_udc.c
+++ b/drivers/usb/gadget/udc/s3c2410_udc.c
@@ -1784,6 +1784,10 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
 	s3c2410_udc_reinit(udc);
 
 	irq_usbd = platform_get_irq(pdev, 0);
+	if (irq_usbd < 0) {
+		retval = irq_usbd;
+		goto err_udc_clk;
+	}
 
 	/* irq setup after old hardware state is cleaned up */
 	retval = request_irq(irq_usbd, s3c2410_udc_irq,
diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c
index c0ca7144e512..43f1b0d461c1 100644
--- a/drivers/usb/gadget/udc/tegra-xudc.c
+++ b/drivers/usb/gadget/udc/tegra-xudc.c
@@ -1610,7 +1610,7 @@ static void tegra_xudc_ep_context_setup(struct tegra_xudc_ep *ep)
 	u16 maxpacket, maxburst = 0, esit = 0;
 	u32 val;
 
-	maxpacket = usb_endpoint_maxp(desc) & 0x7ff;
+	maxpacket = usb_endpoint_maxp(desc);
 	if (xudc->gadget.speed == USB_SPEED_SUPER) {
 		if (!usb_endpoint_xfer_control(desc))
 			maxburst = comp_desc->bMaxBurst;
@@ -1621,7 +1621,7 @@ static void tegra_xudc_ep_context_setup(struct tegra_xudc_ep *ep)
 		   (usb_endpoint_xfer_int(desc) ||
 		    usb_endpoint_xfer_isoc(desc))) {
 		if (xudc->gadget.speed == USB_SPEED_HIGH) {
-			maxburst = (usb_endpoint_maxp(desc) >> 11) & 0x3;
+			maxburst = usb_endpoint_maxp_mult(desc) - 1;
 			if (maxburst == 0x3) {
 				dev_warn(xudc->dev,
 					 "invalid endpoint maxburst\n");
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index df9428f1dc5e..c4736d1d020c 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -187,15 +187,6 @@ config USB_EHCI_PCI
 	depends on USB_PCI
 	default y
 
-config USB_EHCI_HCD_PMC_MSP
-	tristate "EHCI support for on-chip PMC MSP71xx USB controller"
-	depends on MSP_HAS_USB
-	select USB_EHCI_BIG_ENDIAN_DESC
-	select USB_EHCI_BIG_ENDIAN_MMIO
-	help
-		Enables support for the onchip USB controller on the PMC_MSP7100 Family SoC's.
-		If unsure, say N.
-
 config XPS_USB_HCD_XILINX
 	bool "Use Xilinx usb host EHCI controller core"
 	depends on (PPC32 || MICROBLAZE)
diff --git a/drivers/usb/host/ehci-brcm.c b/drivers/usb/host/ehci-brcm.c
index 3e0ebe8cc649..d3626bfa966b 100644
--- a/drivers/usb/host/ehci-brcm.c
+++ b/drivers/usb/host/ehci-brcm.c
@@ -108,10 +108,9 @@ static int ehci_brcm_reset(struct usb_hcd *hcd)
 	/*
 	 * SWLINUX-1705: Avoid OUT packet underflows during high memory
 	 *   bus usage
-	 * port_status[0x0f] = Broadcom-proprietary USB_EHCI_INSNREG00 @ 0x90
 	 */
-	ehci_writel(ehci, 0x00800040, &ehci->regs->port_status[0x10]);
-	ehci_writel(ehci, 0x00000001, &ehci->regs->port_status[0x12]);
+	ehci_writel(ehci, 0x00800040, &ehci->regs->brcm_insnreg[1]);
+	ehci_writel(ehci, 0x00000001, &ehci->regs->brcm_insnreg[3]);
 
 	return ehci_setup(hcd);
 }
@@ -223,11 +222,9 @@ static int __maybe_unused ehci_brcm_resume(struct device *dev)
 	/*
 	 * SWLINUX-1705: Avoid OUT packet underflows during high memory
 	 *   bus usage
-	 * port_status[0x0f] = Broadcom-proprietary USB_EHCI_INSNREG00
-	 * @ 0x90
 	 */
-	ehci_writel(ehci, 0x00800040, &ehci->regs->port_status[0x10]);
-	ehci_writel(ehci, 0x00000001, &ehci->regs->port_status[0x12]);
+	ehci_writel(ehci, 0x00800040, &ehci->regs->brcm_insnreg[1]);
+	ehci_writel(ehci, 0x00000001, &ehci->regs->brcm_insnreg[3]);
 
 	ehci_resume(hcd, false);
 
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 10b0365f3439..6bdc6d6bf74d 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1296,11 +1296,6 @@ MODULE_LICENSE ("GPL");
 #define XILINX_OF_PLATFORM_DRIVER	ehci_hcd_xilinx_of_driver
 #endif
 
-#ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
-#include "ehci-pmcmsp.c"
-#define	PLATFORM_DRIVER		ehci_hcd_msp_driver
-#endif
-
 #ifdef CONFIG_SPARC_LEON
 #include "ehci-grlib.c"
 #define PLATFORM_DRIVER		ehci_grlib_driver
diff --git a/drivers/usb/host/ehci-mv.c b/drivers/usb/host/ehci-mv.c
index cffdc8d01b2a..8fd27249ad25 100644
--- a/drivers/usb/host/ehci-mv.c
+++ b/drivers/usb/host/ehci-mv.c
@@ -42,26 +42,25 @@ struct ehci_hcd_mv {
 	int (*set_vbus)(unsigned int vbus);
 };
 
-static void ehci_clock_enable(struct ehci_hcd_mv *ehci_mv)
+static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv)
 {
-	clk_prepare_enable(ehci_mv->clk);
-}
+	int retval;
 
-static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv)
-{
-	clk_disable_unprepare(ehci_mv->clk);
-}
+	retval = clk_prepare_enable(ehci_mv->clk);
+	if (retval)
+		return retval;
 
-static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv)
-{
-	ehci_clock_enable(ehci_mv);
-	return phy_init(ehci_mv->phy);
+	retval = phy_init(ehci_mv->phy);
+	if (retval)
+		clk_disable_unprepare(ehci_mv->clk);
+
+	return retval;
 }
 
 static void mv_ehci_disable(struct ehci_hcd_mv *ehci_mv)
 {
 	phy_exit(ehci_mv->phy);
-	ehci_clock_disable(ehci_mv);
+	clk_disable_unprepare(ehci_mv->clk);
 }
 
 static int mv_ehci_reset(struct usb_hcd *hcd)
diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index a319b1df3011..3626758b3e2a 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -264,8 +264,11 @@ static int ehci_orion_drv_probe(struct platform_device *pdev)
 	 * the clock does not exists.
 	 */
 	priv->clk = devm_clk_get(&pdev->dev, NULL);
-	if (!IS_ERR(priv->clk))
-		clk_prepare_enable(priv->clk);
+	if (!IS_ERR(priv->clk)) {
+		err = clk_prepare_enable(priv->clk);
+		if (err)
+			goto err_put_hcd;
+	}
 
 	priv->phy = devm_phy_optional_get(&pdev->dev, "usb");
 	if (IS_ERR(priv->phy)) {
@@ -311,6 +314,7 @@ static int ehci_orion_drv_probe(struct platform_device *pdev)
 err_dis_clk:
 	if (!IS_ERR(priv->clk))
 		clk_disable_unprepare(priv->clk);
+err_put_hcd:
 	usb_put_hcd(hcd);
 err:
 	dev_err(&pdev->dev, "init %s fail, %d\n",
diff --git a/drivers/usb/host/ehci-pmcmsp.c b/drivers/usb/host/ehci-pmcmsp.c
deleted file mode 100644
index 5fb92b956cc7..000000000000
--- a/drivers/usb/host/ehci-pmcmsp.c
+++ /dev/null
@@ -1,328 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * PMC MSP EHCI (Host Controller Driver) for USB.
- *
- * (C) Copyright 2006-2010 PMC-Sierra Inc
- */
-
-/* includes */
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/usb.h>
-#include <msp_usb.h>
-
-/* stream disable*/
-#define USB_CTRL_MODE_STREAM_DISABLE	0x10
-
-/* threshold */
-#define USB_CTRL_FIFO_THRESH		0x00300000
-
-/* register offset for usb_mode */
-#define USB_EHCI_REG_USB_MODE		0x68
-
-/* register offset for usb fifo */
-#define USB_EHCI_REG_USB_FIFO		0x24
-
-/* register offset for usb status */
-#define USB_EHCI_REG_USB_STATUS		0x44
-
-/* serial/parallel transceiver */
-#define USB_EHCI_REG_BIT_STAT_STS	(1<<29)
-
-/* TWI USB0 host device pin */
-#define MSP_PIN_USB0_HOST_DEV		49
-
-/* TWI USB1 host device pin */
-#define MSP_PIN_USB1_HOST_DEV		50
-
-
-static void usb_hcd_tdi_set_mode(struct ehci_hcd *ehci)
-{
-	u8 *base;
-	u8 *statreg;
-	u8 *fiforeg;
-	u32 val;
-	struct ehci_regs *reg_base = ehci->regs;
-
-	/* get register base */
-	base = (u8 *)reg_base + USB_EHCI_REG_USB_MODE;
-	statreg = (u8 *)reg_base + USB_EHCI_REG_USB_STATUS;
-	fiforeg = (u8 *)reg_base + USB_EHCI_REG_USB_FIFO;
-
-	/* Disable controller mode stream */
-	val = ehci_readl(ehci, (u32 *)base);
-	ehci_writel(ehci, (val | USB_CTRL_MODE_STREAM_DISABLE),
-			(u32 *)base);
-
-	/* clear STS to select parallel transceiver interface */
-	val = ehci_readl(ehci, (u32 *)statreg);
-	val = val & ~USB_EHCI_REG_BIT_STAT_STS;
-	ehci_writel(ehci, val, (u32 *)statreg);
-
-	/* write to set the proper fifo threshold */
-	ehci_writel(ehci, USB_CTRL_FIFO_THRESH, (u32 *)fiforeg);
-
-	/* set TWI GPIO USB_HOST_DEV pin high */
-	gpio_direction_output(MSP_PIN_USB0_HOST_DEV, 1);
-}
-
-/* called during probe() after chip reset completes */
-static int ehci_msp_setup(struct usb_hcd *hcd)
-{
-	struct ehci_hcd		*ehci = hcd_to_ehci(hcd);
-	int			retval;
-
-	ehci->big_endian_mmio = 1;
-	ehci->big_endian_desc = 1;
-
-	ehci->caps = hcd->regs;
-	hcd->has_tt = 1;
-
-	retval = ehci_setup(hcd);
-	if (retval)
-		return retval;
-
-	usb_hcd_tdi_set_mode(ehci);
-
-	return retval;
-}
-
-
-/* configure so an HC device and id are always provided
- * always called with process context; sleeping is OK
- */
-
-static int usb_hcd_msp_map_regs(struct mspusb_device *dev)
-{
-	struct resource *res;
-	struct platform_device *pdev = &dev->dev;
-	u32 res_len;
-	int retval;
-
-	/* MAB register space */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	if (res == NULL)
-		return -ENOMEM;
-	res_len = resource_size(res);
-	if (!request_mem_region(res->start, res_len, "mab regs"))
-		return -EBUSY;
-
-	dev->mab_regs = ioremap(res->start, res_len);
-	if (dev->mab_regs == NULL) {
-		retval = -ENOMEM;
-		goto err1;
-	}
-
-	/* MSP USB register space */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
-	if (res == NULL) {
-		retval = -ENOMEM;
-		goto err2;
-	}
-	res_len = resource_size(res);
-	if (!request_mem_region(res->start, res_len, "usbid regs")) {
-		retval = -EBUSY;
-		goto err2;
-	}
-	dev->usbid_regs = ioremap(res->start, res_len);
-	if (dev->usbid_regs == NULL) {
-		retval = -ENOMEM;
-		goto err3;
-	}
-
-	return 0;
-err3:
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
-	res_len = resource_size(res);
-	release_mem_region(res->start, res_len);
-err2:
-	iounmap(dev->mab_regs);
-err1:
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	res_len = resource_size(res);
-	release_mem_region(res->start, res_len);
-	dev_err(&pdev->dev, "Failed to map non-EHCI regs.\n");
-	return retval;
-}
-
-/**
- * usb_hcd_msp_probe - initialize PMC MSP-based HCDs
- * @driver:	Pointer to hc driver instance
- * @dev:	USB controller to probe
- *
- * Context: task context, might sleep
- *
- * Allocates basic resources for this USB host controller, and
- * then invokes the start() method for the HCD associated with it
- * through the hotplug entry's driver_data.
- */
-int usb_hcd_msp_probe(const struct hc_driver *driver,
-			  struct platform_device *dev)
-{
-	int retval;
-	struct usb_hcd *hcd;
-	struct resource *res;
-	struct ehci_hcd		*ehci ;
-
-	hcd = usb_create_hcd(driver, &dev->dev, "pmcmsp");
-	if (!hcd)
-		return -ENOMEM;
-
-	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
-	if (res == NULL) {
-		pr_debug("No IOMEM resource info for %s.\n", dev->name);
-		retval = -ENOMEM;
-		goto err1;
-	}
-	hcd->rsrc_start = res->start;
-	hcd->rsrc_len = resource_size(res);
-	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, dev->name)) {
-		retval = -EBUSY;
-		goto err1;
-	}
-	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
-	if (!hcd->regs) {
-		pr_debug("ioremap failed");
-		retval = -ENOMEM;
-		goto err2;
-	}
-
-	res = platform_get_resource(dev, IORESOURCE_IRQ, 0);
-	if (res == NULL) {
-		dev_err(&dev->dev, "No IRQ resource info for %s.\n", dev->name);
-		retval = -ENOMEM;
-		goto err3;
-	}
-
-	/* Map non-EHCI register spaces */
-	retval = usb_hcd_msp_map_regs(to_mspusb_device(dev));
-	if (retval != 0)
-		goto err3;
-
-	ehci = hcd_to_ehci(hcd);
-	ehci->big_endian_mmio = 1;
-	ehci->big_endian_desc = 1;
-
-
-	retval = usb_add_hcd(hcd, res->start, IRQF_SHARED);
-	if (retval == 0) {
-		device_wakeup_enable(hcd->self.controller);
-		return 0;
-	}
-
-	usb_remove_hcd(hcd);
-err3:
-	iounmap(hcd->regs);
-err2:
-	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
-err1:
-	usb_put_hcd(hcd);
-
-	return retval;
-}
-
-
-
-/**
- * usb_hcd_msp_remove - shutdown processing for PMC MSP-based HCDs
- * @hcd: USB Host Controller being removed
- *
- * Context: task context, might sleep
- *
- * Reverses the effect of usb_hcd_msp_probe(), first invoking
- * the HCD's stop() method.  It is always called from a thread
- * context, normally "rmmod", "apmd", or something similar.
- *
- * may be called without controller electrically present
- * may be called with controller, bus, and devices active
- */
-static void usb_hcd_msp_remove(struct usb_hcd *hcd)
-{
-	usb_remove_hcd(hcd);
-	iounmap(hcd->regs);
-	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
-	usb_put_hcd(hcd);
-}
-
-static const struct hc_driver ehci_msp_hc_driver = {
-	.description =		hcd_name,
-	.product_desc =		"PMC MSP EHCI",
-	.hcd_priv_size =	sizeof(struct ehci_hcd),
-
-	/*
-	 * generic hardware linkage
-	 */
-	.irq =			ehci_irq,
-	.flags =		HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
-
-	/*
-	 * basic lifecycle operations
-	 */
-	.reset			= ehci_msp_setup,
-	.shutdown		= ehci_shutdown,
-	.start			= ehci_run,
-	.stop			= ehci_stop,
-
-	/*
-	 * managing i/o requests and associated device resources
-	 */
-	.urb_enqueue		= ehci_urb_enqueue,
-	.urb_dequeue		= ehci_urb_dequeue,
-	.endpoint_disable	= ehci_endpoint_disable,
-	.endpoint_reset		= ehci_endpoint_reset,
-
-	/*
-	 * scheduling support
-	 */
-	.get_frame_number	= ehci_get_frame,
-
-	/*
-	 * root hub support
-	 */
-	.hub_status_data	= ehci_hub_status_data,
-	.hub_control		= ehci_hub_control,
-	.bus_suspend		= ehci_bus_suspend,
-	.bus_resume		= ehci_bus_resume,
-	.relinquish_port	= ehci_relinquish_port,
-	.port_handed_over	= ehci_port_handed_over,
-
-	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
-};
-
-static int ehci_hcd_msp_drv_probe(struct platform_device *pdev)
-{
-	int ret;
-
-	pr_debug("In ehci_hcd_msp_drv_probe");
-
-	if (usb_disabled())
-		return -ENODEV;
-
-	gpio_request(MSP_PIN_USB0_HOST_DEV, "USB0_HOST_DEV_GPIO");
-
-	ret = usb_hcd_msp_probe(&ehci_msp_hc_driver, pdev);
-
-	return ret;
-}
-
-static int ehci_hcd_msp_drv_remove(struct platform_device *pdev)
-{
-	struct usb_hcd *hcd = platform_get_drvdata(pdev);
-
-	usb_hcd_msp_remove(hcd);
-
-	/* free TWI GPIO USB_HOST_DEV pin */
-	gpio_free(MSP_PIN_USB0_HOST_DEV);
-
-	return 0;
-}
-
-MODULE_ALIAS("pmcmsp-ehci");
-
-static struct platform_driver ehci_hcd_msp_driver = {
-	.probe		= ehci_hcd_msp_drv_probe,
-	.remove		= ehci_hcd_msp_drv_remove,
-	.driver		= {
-		.name	= "pmcmsp-ehci",
-	},
-};
diff --git a/drivers/usb/host/fotg210-hcd.c b/drivers/usb/host/fotg210-hcd.c
index 05fb8d97cf02..4b02ace09f3d 100644
--- a/drivers/usb/host/fotg210-hcd.c
+++ b/drivers/usb/host/fotg210-hcd.c
@@ -1858,9 +1858,11 @@ static struct fotg210_qh *fotg210_qh_alloc(struct fotg210_hcd *fotg210,
 	qh = kzalloc(sizeof(*qh), GFP_ATOMIC);
 	if (!qh)
 		goto done;
-	qh->hw = dma_pool_zalloc(fotg210->qh_pool, flags, &dma);
+	qh->hw = (struct fotg210_qh_hw *)
+		dma_pool_alloc(fotg210->qh_pool, flags, &dma);
 	if (!qh->hw)
 		goto fail;
+	memset(qh->hw, 0, sizeof(*qh->hw));
 	qh->qh_dma = dma;
 	INIT_LIST_HEAD(&qh->qtd_list);
 
@@ -2510,11 +2512,6 @@ retry_xacterr:
 	return count;
 }
 
-/* high bandwidth multiplier, as encoded in highspeed endpoint descriptors */
-#define hb_mult(wMaxPacketSize) (1 + (((wMaxPacketSize) >> 11) & 0x03))
-/* ... and packet size, for any kind of endpoint descriptor */
-#define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
-
 /* reverse of qh_urb_transaction:  free a list of TDs.
  * used for cleanup after errors, before HC sees an URB's TDs.
  */
@@ -2600,7 +2597,7 @@ static struct list_head *qh_urb_transaction(struct fotg210_hcd *fotg210,
 		token |= (1 /* "in" */ << 8);
 	/* else it's already initted to "out" pid (0 << 8) */
 
-	maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input));
+	maxpacket = usb_maxpacket(urb->dev, urb->pipe, !is_input);
 
 	/*
 	 * buffer gets wrapped in one or more qtds;
@@ -2714,9 +2711,11 @@ static struct fotg210_qh *qh_make(struct fotg210_hcd *fotg210, struct urb *urb,
 		gfp_t flags)
 {
 	struct fotg210_qh *qh = fotg210_qh_alloc(fotg210, flags);
+	struct usb_host_endpoint *ep;
 	u32 info1 = 0, info2 = 0;
 	int is_input, type;
 	int maxp = 0;
+	int mult;
 	struct usb_tt *tt = urb->dev->tt;
 	struct fotg210_qh_hw *hw;
 
@@ -2731,14 +2730,15 @@ static struct fotg210_qh *qh_make(struct fotg210_hcd *fotg210, struct urb *urb,
 
 	is_input = usb_pipein(urb->pipe);
 	type = usb_pipetype(urb->pipe);
-	maxp = usb_maxpacket(urb->dev, urb->pipe, !is_input);
+	ep = usb_pipe_endpoint(urb->dev, urb->pipe);
+	maxp = usb_endpoint_maxp(&ep->desc);
+	mult = usb_endpoint_maxp_mult(&ep->desc);
 
 	/* 1024 byte maxpacket is a hardware ceiling.  High bandwidth
 	 * acts like up to 3KB, but is built from smaller packets.
 	 */
-	if (max_packet(maxp) > 1024) {
-		fotg210_dbg(fotg210, "bogus qh maxpacket %d\n",
-				max_packet(maxp));
+	if (maxp > 1024) {
+		fotg210_dbg(fotg210, "bogus qh maxpacket %d\n", maxp);
 		goto done;
 	}
 
@@ -2752,8 +2752,7 @@ static struct fotg210_qh *qh_make(struct fotg210_hcd *fotg210, struct urb *urb,
 	 */
 	if (type == PIPE_INTERRUPT) {
 		qh->usecs = NS_TO_US(usb_calc_bus_time(USB_SPEED_HIGH,
-				is_input, 0,
-				hb_mult(maxp) * max_packet(maxp)));
+				is_input, 0, mult * maxp));
 		qh->start = NO_FRAME;
 
 		if (urb->dev->speed == USB_SPEED_HIGH) {
@@ -2790,7 +2789,7 @@ static struct fotg210_qh *qh_make(struct fotg210_hcd *fotg210, struct urb *urb,
 			think_time = tt ? tt->think_time : 0;
 			qh->tt_usecs = NS_TO_US(think_time +
 					usb_calc_bus_time(urb->dev->speed,
-					is_input, 0, max_packet(maxp)));
+					is_input, 0, maxp));
 			qh->period = urb->interval;
 			if (qh->period > fotg210->periodic_size) {
 				qh->period = fotg210->periodic_size;
@@ -2853,11 +2852,11 @@ static struct fotg210_qh *qh_make(struct fotg210_hcd *fotg210, struct urb *urb,
 			 * to help them do so.  So now people expect to use
 			 * such nonconformant devices with Linux too; sigh.
 			 */
-			info1 |= max_packet(maxp) << 16;
+			info1 |= maxp << 16;
 			info2 |= (FOTG210_TUNE_MULT_HS << 30);
 		} else {		/* PIPE_INTERRUPT */
-			info1 |= max_packet(maxp) << 16;
-			info2 |= hb_mult(maxp) << 30;
+			info1 |= maxp << 16;
+			info2 |= mult << 30;
 		}
 		break;
 	default:
@@ -3927,6 +3926,7 @@ static void iso_stream_init(struct fotg210_hcd *fotg210,
 	int is_input;
 	long bandwidth;
 	unsigned multi;
+	struct usb_host_endpoint *ep;
 
 	/*
 	 * this might be a "high bandwidth" highspeed endpoint,
@@ -3934,14 +3934,14 @@ static void iso_stream_init(struct fotg210_hcd *fotg210,
 	 */
 	epnum = usb_pipeendpoint(pipe);
 	is_input = usb_pipein(pipe) ? USB_DIR_IN : 0;
-	maxp = usb_maxpacket(dev, pipe, !is_input);
+	ep = usb_pipe_endpoint(dev, pipe);
+	maxp = usb_endpoint_maxp(&ep->desc);
 	if (is_input)
 		buf1 = (1 << 11);
 	else
 		buf1 = 0;
 
-	maxp = max_packet(maxp);
-	multi = hb_mult(maxp);
+	multi = usb_endpoint_maxp_mult(&ep->desc);
 	buf1 |= maxp;
 	maxp *= multi;
 
@@ -4112,7 +4112,7 @@ static int itd_urb_transaction(struct fotg210_iso_stream *stream,
 		} else {
 alloc_itd:
 			spin_unlock_irqrestore(&fotg210->lock, flags);
-			itd = dma_pool_zalloc(fotg210->itd_pool, mem_flags,
+			itd = dma_pool_alloc(fotg210->itd_pool, mem_flags,
 					&itd_dma);
 			spin_lock_irqsave(&fotg210->lock, flags);
 			if (!itd) {
@@ -4122,6 +4122,7 @@ alloc_itd:
 			}
 		}
 
+		memset(itd, 0, sizeof(*itd));
 		itd->itd_dma = itd_dma;
 		list_add(&itd->itd_list, &sched->td_list);
 	}
@@ -4462,13 +4463,12 @@ static bool itd_complete(struct fotg210_hcd *fotg210, struct fotg210_itd *itd)
 
 			/* HC need not update length with this error */
 			if (!(t & FOTG210_ISOC_BABBLE)) {
-				desc->actual_length =
-					fotg210_itdlen(urb, desc, t);
+				desc->actual_length = FOTG210_ITD_LENGTH(t);
 				urb->actual_length += desc->actual_length;
 			}
 		} else if (likely((t & FOTG210_ISOC_ACTIVE) == 0)) {
 			desc->status = 0;
-			desc->actual_length = fotg210_itdlen(urb, desc, t);
+			desc->actual_length = FOTG210_ITD_LENGTH(t);
 			urb->actual_length += desc->actual_length;
 		} else {
 			/* URB was too late */
diff --git a/drivers/usb/host/fotg210.h b/drivers/usb/host/fotg210.h
index 0a91061a0551..0781442b7a24 100644
--- a/drivers/usb/host/fotg210.h
+++ b/drivers/usb/host/fotg210.h
@@ -683,11 +683,6 @@ static inline unsigned fotg210_read_frame_index(struct fotg210_hcd *fotg210)
 	return fotg210_readl(fotg210, &fotg210->regs->frame_index);
 }
 
-#define fotg210_itdlen(urb, desc, t) ({			\
-	usb_pipein((urb)->pipe) ?				\
-	(desc)->length - FOTG210_ITD_LENGTH(t) :			\
-	FOTG210_ITD_LENGTH(t);					\
-})
 /*-------------------------------------------------------------------------*/
 
 #endif /* __LINUX_FOTG210_H */
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index 9bbd7ddd0003..a24aea3d2759 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -611,8 +611,6 @@ ohci_hcd_at91_drv_suspend(struct device *dev)
 	if (ohci_at91->wakeup)
 		enable_irq_wake(hcd->irq);
 
-	ohci_at91_port_suspend(ohci_at91->sfr_regmap, 1);
-
 	ret = ohci_suspend(hcd, ohci_at91->wakeup);
 	if (ret) {
 		if (ohci_at91->wakeup)
@@ -632,7 +630,10 @@ ohci_hcd_at91_drv_suspend(struct device *dev)
 		/* flush the writes */
 		(void) ohci_readl (ohci, &ohci->regs->control);
 		msleep(1);
+		ohci_at91_port_suspend(ohci_at91->sfr_regmap, 1);
 		at91_stop_clock(ohci_at91);
+	} else {
+		ohci_at91_port_suspend(ohci_at91->sfr_regmap, 1);
 	}
 
 	return ret;
@@ -644,6 +645,8 @@ ohci_hcd_at91_drv_resume(struct device *dev)
 	struct usb_hcd	*hcd = dev_get_drvdata(dev);
 	struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);
 
+	ohci_at91_port_suspend(ohci_at91->sfr_regmap, 0);
+
 	if (ohci_at91->wakeup)
 		disable_irq_wake(hcd->irq);
 	else
@@ -651,8 +654,6 @@ ohci_hcd_at91_drv_resume(struct device *dev)
 
 	ohci_resume(hcd, false);
 
-	ohci_at91_port_suspend(ohci_at91->sfr_regmap, 0);
-
 	return 0;
 }
 
diff --git a/drivers/usb/host/ohci-spear.c b/drivers/usb/host/ohci-spear.c
index 5cc05449281c..b4cd9e6c72fd 100644
--- a/drivers/usb/host/ohci-spear.c
+++ b/drivers/usb/host/ohci-spear.c
@@ -84,7 +84,7 @@ static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
 
 	clk_prepare_enable(sohci_p->clk);
 
-	retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), 0);
+	retval = usb_add_hcd(hcd, irq, 0);
 	if (retval == 0) {
 		device_wakeup_enable(hcd->self.controller);
 		return retval;
diff --git a/drivers/usb/host/ohci-tmio.c b/drivers/usb/host/ohci-tmio.c
index 7f857bad9e95..08ec2ab0d95a 100644
--- a/drivers/usb/host/ohci-tmio.c
+++ b/drivers/usb/host/ohci-tmio.c
@@ -202,6 +202,9 @@ static int ohci_hcd_tmio_drv_probe(struct platform_device *dev)
 	if (!cell)
 		return -EINVAL;
 
+	if (irq < 0)
+		return irq;
+
 	hcd = usb_create_hcd(&ohci_tmio_hc_driver, &dev->dev, dev_name(&dev->dev));
 	if (!hcd) {
 		ret = -ENOMEM;
diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c
index bef104511352..6e784f2fc26d 100644
--- a/drivers/usb/host/xhci-dbgtty.c
+++ b/drivers/usb/host/xhci-dbgtty.c
@@ -541,7 +541,7 @@ static int dbc_tty_init(void)
 	ret = tty_register_driver(dbc_tty_driver);
 	if (ret) {
 		pr_err("Can't register dbc tty driver\n");
-		put_tty_driver(dbc_tty_driver);
+		tty_driver_kref_put(dbc_tty_driver);
 	}
 	return ret;
 }
@@ -550,7 +550,7 @@ static void dbc_tty_exit(void)
 {
 	if (dbc_tty_driver) {
 		tty_unregister_driver(dbc_tty_driver);
-		put_tty_driver(dbc_tty_driver);
+		tty_driver_kref_put(dbc_tty_driver);
 		dbc_tty_driver = NULL;
 	}
 }
diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c
index 2c0fda57869e..dc832ddf7033 100644
--- a/drivers/usb/host/xhci-debugfs.c
+++ b/drivers/usb/host/xhci-debugfs.c
@@ -198,12 +198,13 @@ static void xhci_ring_dump_segment(struct seq_file *s,
 	int			i;
 	dma_addr_t		dma;
 	union xhci_trb		*trb;
+	char			str[XHCI_MSG_MAX];
 
 	for (i = 0; i < TRBS_PER_SEGMENT; i++) {
 		trb = &seg->trbs[i];
 		dma = seg->dma + i * sizeof(*trb);
 		seq_printf(s, "%pad: %s\n", &dma,
-			   xhci_decode_trb(le32_to_cpu(trb->generic.field[0]),
+			   xhci_decode_trb(str, XHCI_MSG_MAX, le32_to_cpu(trb->generic.field[0]),
 					   le32_to_cpu(trb->generic.field[1]),
 					   le32_to_cpu(trb->generic.field[2]),
 					   le32_to_cpu(trb->generic.field[3])));
@@ -260,11 +261,13 @@ static int xhci_slot_context_show(struct seq_file *s, void *unused)
 	struct xhci_slot_ctx	*slot_ctx;
 	struct xhci_slot_priv	*priv = s->private;
 	struct xhci_virt_device	*dev = priv->dev;
+	char			str[XHCI_MSG_MAX];
 
 	xhci = hcd_to_xhci(bus_to_hcd(dev->udev->bus));
 	slot_ctx = xhci_get_slot_ctx(xhci, dev->out_ctx);
 	seq_printf(s, "%pad: %s\n", &dev->out_ctx->dma,
-		   xhci_decode_slot_context(le32_to_cpu(slot_ctx->dev_info),
+		   xhci_decode_slot_context(str,
+					    le32_to_cpu(slot_ctx->dev_info),
 					    le32_to_cpu(slot_ctx->dev_info2),
 					    le32_to_cpu(slot_ctx->tt_info),
 					    le32_to_cpu(slot_ctx->dev_state)));
@@ -280,6 +283,7 @@ static int xhci_endpoint_context_show(struct seq_file *s, void *unused)
 	struct xhci_ep_ctx	*ep_ctx;
 	struct xhci_slot_priv	*priv = s->private;
 	struct xhci_virt_device	*dev = priv->dev;
+	char			str[XHCI_MSG_MAX];
 
 	xhci = hcd_to_xhci(bus_to_hcd(dev->udev->bus));
 
@@ -287,7 +291,8 @@ static int xhci_endpoint_context_show(struct seq_file *s, void *unused)
 		ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index);
 		dma = dev->out_ctx->dma + (ep_index + 1) * CTX_SIZE(xhci->hcc_params);
 		seq_printf(s, "%pad: %s\n", &dma,
-			   xhci_decode_ep_context(le32_to_cpu(ep_ctx->ep_info),
+			   xhci_decode_ep_context(str,
+						  le32_to_cpu(ep_ctx->ep_info),
 						  le32_to_cpu(ep_ctx->ep_info2),
 						  le64_to_cpu(ep_ctx->deq),
 						  le32_to_cpu(ep_ctx->tx_info)));
@@ -341,9 +346,10 @@ static int xhci_portsc_show(struct seq_file *s, void *unused)
 {
 	struct xhci_port	*port = s->private;
 	u32			portsc;
+	char			str[XHCI_MSG_MAX];
 
 	portsc = readl(port->addr);
-	seq_printf(s, "%s\n", xhci_decode_portsc(portsc));
+	seq_printf(s, "%s\n", xhci_decode_portsc(str, portsc));
 
 	return 0;
 }
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 151e93c4bd57..a3f875eea751 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -1667,7 +1667,8 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
 			status = 1;
 	}
 	if (!status && !reset_change) {
-		xhci_dbg(xhci, "%s: stopping port polling.\n", __func__);
+		xhci_dbg(xhci, "%s: stopping usb%d port polling\n",
+			 __func__, hcd->self.busnum);
 		clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 	}
 	spin_unlock_irqrestore(&xhci->lock, flags);
@@ -1699,7 +1700,8 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
 		if (bus_state->resuming_ports ||	/* USB2 */
 		    bus_state->port_remote_wakeup) {	/* USB3 */
 			spin_unlock_irqrestore(&xhci->lock, flags);
-			xhci_dbg(xhci, "suspend failed because a port is resuming\n");
+			xhci_dbg(xhci, "usb%d bus suspend to fail because a port is resuming\n",
+				 hcd->self.busnum);
 			return -EBUSY;
 		}
 	}
diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c
index cffcaf4dfa9f..134f4789bd89 100644
--- a/drivers/usb/host/xhci-mtk-sch.c
+++ b/drivers/usb/host/xhci-mtk-sch.c
@@ -80,7 +80,7 @@ decode_ep(struct usb_host_endpoint *ep, enum usb_device_speed speed)
 		interval /= 1000;
 	}
 
-	snprintf(buf, DBG_BUF_EN, "%s ep%d%s %s, mpkt:%d, interval:%d/%d%s\n",
+	snprintf(buf, DBG_BUF_EN, "%s ep%d%s %s, mpkt:%d, interval:%d/%d%s",
 		 usb_speed_string(speed), usb_endpoint_num(epd),
 		 usb_endpoint_dir_in(epd) ? "in" : "out",
 		 usb_ep_type_string(usb_endpoint_type(epd)),
@@ -129,6 +129,10 @@ get_bw_info(struct xhci_hcd_mtk *mtk, struct usb_device *udev,
 	int bw_index;
 
 	virt_dev = xhci->devs[udev->slot_id];
+	if (!virt_dev->real_port) {
+		WARN_ONCE(1, "%s invalid real_port\n", dev_name(&udev->dev));
+		return NULL;
+	}
 
 	if (udev->speed >= USB_SPEED_SUPER) {
 		if (usb_endpoint_dir_out(&ep->desc))
@@ -236,14 +240,20 @@ static void drop_tt(struct usb_device *udev)
 	}
 }
 
-static struct mu3h_sch_ep_info *create_sch_ep(struct usb_device *udev,
-	struct usb_host_endpoint *ep, struct xhci_ep_ctx *ep_ctx)
+static struct mu3h_sch_ep_info *
+create_sch_ep(struct xhci_hcd_mtk *mtk, struct usb_device *udev,
+	      struct usb_host_endpoint *ep, struct xhci_ep_ctx *ep_ctx)
 {
 	struct mu3h_sch_ep_info *sch_ep;
+	struct mu3h_sch_bw_info *bw_info;
 	struct mu3h_sch_tt *tt = NULL;
 	u32 len_bw_budget_table;
 	size_t mem_size;
 
+	bw_info = get_bw_info(mtk, udev, ep);
+	if (!bw_info)
+		return ERR_PTR(-ENODEV);
+
 	if (is_fs_or_ls(udev->speed))
 		len_bw_budget_table = TT_MICROFRAMES_MAX;
 	else if ((udev->speed >= USB_SPEED_SUPER)
@@ -266,11 +276,13 @@ static struct mu3h_sch_ep_info *create_sch_ep(struct usb_device *udev,
 		}
 	}
 
+	sch_ep->bw_info = bw_info;
 	sch_ep->sch_tt = tt;
 	sch_ep->ep = ep;
 	sch_ep->speed = udev->speed;
 	INIT_LIST_HEAD(&sch_ep->endpoint);
 	INIT_LIST_HEAD(&sch_ep->tt_endpoint);
+	INIT_HLIST_NODE(&sch_ep->hentry);
 
 	return sch_ep;
 }
@@ -297,6 +309,7 @@ static void setup_sch_info(struct xhci_ep_ctx *ep_ctx,
 		 CTX_TO_MAX_ESIT_PAYLOAD(le32_to_cpu(ep_ctx->tx_info));
 
 	sch_ep->esit = get_esit(ep_ctx);
+	sch_ep->num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
 	sch_ep->ep_type = ep_type;
 	sch_ep->maxpkt = maxpkt;
 	sch_ep->offset = 0;
@@ -401,19 +414,16 @@ static void setup_sch_info(struct xhci_ep_ctx *ep_ctx,
 static u32 get_max_bw(struct mu3h_sch_bw_info *sch_bw,
 	struct mu3h_sch_ep_info *sch_ep, u32 offset)
 {
-	u32 num_esit;
 	u32 max_bw = 0;
 	u32 bw;
-	int i;
-	int j;
+	int i, j, k;
 
-	num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
-	for (i = 0; i < num_esit; i++) {
+	for (i = 0; i < sch_ep->num_esit; i++) {
 		u32 base = offset + i * sch_ep->esit;
 
 		for (j = 0; j < sch_ep->num_budget_microframes; j++) {
-			bw = sch_bw->bus_bw[base + j] +
-					sch_ep->bw_budget_table[j];
+			k = XHCI_MTK_BW_INDEX(base + j);
+			bw = sch_bw->bus_bw[k] + sch_ep->bw_budget_table[j];
 			if (bw > max_bw)
 				max_bw = bw;
 		}
@@ -424,21 +434,17 @@ static u32 get_max_bw(struct mu3h_sch_bw_info *sch_bw,
 static void update_bus_bw(struct mu3h_sch_bw_info *sch_bw,
 	struct mu3h_sch_ep_info *sch_ep, bool used)
 {
-	u32 num_esit;
 	u32 base;
-	int i;
-	int j;
+	int i, j, k;
 
-	num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
-	for (i = 0; i < num_esit; i++) {
+	for (i = 0; i < sch_ep->num_esit; i++) {
 		base = sch_ep->offset + i * sch_ep->esit;
 		for (j = 0; j < sch_ep->num_budget_microframes; j++) {
+			k = XHCI_MTK_BW_INDEX(base + j);
 			if (used)
-				sch_bw->bus_bw[base + j] +=
-					sch_ep->bw_budget_table[j];
+				sch_bw->bus_bw[k] += sch_ep->bw_budget_table[j];
 			else
-				sch_bw->bus_bw[base + j] -=
-					sch_ep->bw_budget_table[j];
+				sch_bw->bus_bw[k] -= sch_ep->bw_budget_table[j];
 		}
 	}
 }
@@ -446,20 +452,20 @@ static void update_bus_bw(struct mu3h_sch_bw_info *sch_bw,
 static int check_fs_bus_bw(struct mu3h_sch_ep_info *sch_ep, int offset)
 {
 	struct mu3h_sch_tt *tt = sch_ep->sch_tt;
-	u32 num_esit, tmp;
+	u32 tmp;
 	int base;
-	int i, j;
+	int i, j, k;
 
-	num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
-	for (i = 0; i < num_esit; i++) {
+	for (i = 0; i < sch_ep->num_esit; i++) {
 		base = offset + i * sch_ep->esit;
 
 		/*
 		 * Compared with hs bus, no matter what ep type,
 		 * the hub will always delay one uframe to send data
 		 */
-		for (j = 0; j < sch_ep->cs_count; j++) {
-			tmp = tt->fs_bus_bw[base + j] + sch_ep->bw_cost_per_microframe;
+		for (j = 0; j < sch_ep->num_budget_microframes; j++) {
+			k = XHCI_MTK_BW_INDEX(base + j);
+			tmp = tt->fs_bus_bw[k] + sch_ep->bw_budget_table[j];
 			if (tmp > FS_PAYLOAD_MAX)
 				return -ESCH_BW_OVERFLOW;
 		}
@@ -533,22 +539,19 @@ static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset)
 static void update_sch_tt(struct mu3h_sch_ep_info *sch_ep, bool used)
 {
 	struct mu3h_sch_tt *tt = sch_ep->sch_tt;
-	u32 base, num_esit;
-	int bw_updated;
-	int i, j;
-
-	num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
-
-	if (used)
-		bw_updated = sch_ep->bw_cost_per_microframe;
-	else
-		bw_updated = -sch_ep->bw_cost_per_microframe;
+	u32 base;
+	int i, j, k;
 
-	for (i = 0; i < num_esit; i++) {
+	for (i = 0; i < sch_ep->num_esit; i++) {
 		base = sch_ep->offset + i * sch_ep->esit;
 
-		for (j = 0; j < sch_ep->cs_count; j++)
-			tt->fs_bus_bw[base + j] += bw_updated;
+		for (j = 0; j < sch_ep->num_budget_microframes; j++) {
+			k = XHCI_MTK_BW_INDEX(base + j);
+			if (used)
+				tt->fs_bus_bw[k] += sch_ep->bw_budget_table[j];
+			else
+				tt->fs_bus_bw[k] -= sch_ep->bw_budget_table[j];
+		}
 	}
 
 	if (used)
@@ -570,25 +573,9 @@ static int load_ep_bw(struct mu3h_sch_bw_info *sch_bw,
 	return 0;
 }
 
-static u32 get_esit_boundary(struct mu3h_sch_ep_info *sch_ep)
-{
-	u32 boundary = sch_ep->esit;
-
-	if (sch_ep->sch_tt) { /* LS/FS with TT */
-		/* tune for CS */
-		if (sch_ep->ep_type != ISOC_OUT_EP)
-			boundary++;
-		else if (boundary > 1) /* normally esit >= 8 for FS/LS */
-			boundary--;
-	}
-
-	return boundary;
-}
-
-static int check_sch_bw(struct mu3h_sch_bw_info *sch_bw,
-			struct mu3h_sch_ep_info *sch_ep)
+static int check_sch_bw(struct mu3h_sch_ep_info *sch_ep)
 {
-	const u32 esit_boundary = get_esit_boundary(sch_ep);
+	struct mu3h_sch_bw_info *sch_bw = sch_ep->bw_info;
 	const u32 bw_boundary = get_bw_boundary(sch_ep->speed);
 	u32 offset;
 	u32 worst_bw;
@@ -605,9 +592,6 @@ static int check_sch_bw(struct mu3h_sch_bw_info *sch_bw,
 		if (ret)
 			continue;
 
-		if ((offset + sch_ep->num_budget_microframes) > esit_boundary)
-			break;
-
 		worst_bw = get_max_bw(sch_bw, sch_ep, offset);
 		if (worst_bw > bw_boundary)
 			continue;
@@ -633,23 +617,26 @@ static int check_sch_bw(struct mu3h_sch_bw_info *sch_bw,
 	return load_ep_bw(sch_bw, sch_ep, true);
 }
 
-static void destroy_sch_ep(struct usb_device *udev,
-	struct mu3h_sch_bw_info *sch_bw, struct mu3h_sch_ep_info *sch_ep)
+static void destroy_sch_ep(struct xhci_hcd_mtk *mtk, struct usb_device *udev,
+			   struct mu3h_sch_ep_info *sch_ep)
 {
 	/* only release ep bw check passed by check_sch_bw() */
 	if (sch_ep->allocated)
-		load_ep_bw(sch_bw, sch_ep, false);
+		load_ep_bw(sch_ep->bw_info, sch_ep, false);
 
 	if (sch_ep->sch_tt)
 		drop_tt(udev);
 
 	list_del(&sch_ep->endpoint);
+	hlist_del(&sch_ep->hentry);
 	kfree(sch_ep);
 }
 
-static bool need_bw_sch(struct usb_host_endpoint *ep,
-	enum usb_device_speed speed, int has_tt)
+static bool need_bw_sch(struct usb_device *udev,
+			struct usb_host_endpoint *ep)
 {
+	bool has_tt = udev->tt && udev->tt->hub->parent;
+
 	/* only for periodic endpoints */
 	if (usb_endpoint_xfer_control(&ep->desc)
 		|| usb_endpoint_xfer_bulk(&ep->desc))
@@ -660,7 +647,7 @@ static bool need_bw_sch(struct usb_host_endpoint *ep,
 	 * a TT are also ignored, root-hub will schedule them directly,
 	 * but need set @bpkts field of endpoint context to 1.
 	 */
-	if (is_fs_or_ls(speed) && !has_tt)
+	if (is_fs_or_ls(udev->speed) && !has_tt)
 		return false;
 
 	/* skip endpoint with zero maxpkt */
@@ -675,7 +662,6 @@ int xhci_mtk_sch_init(struct xhci_hcd_mtk *mtk)
 	struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd);
 	struct mu3h_sch_bw_info *sch_array;
 	int num_usb_bus;
-	int i;
 
 	/* ss IN and OUT are separated */
 	num_usb_bus = xhci->usb3_rhub.num_ports * 2 + xhci->usb2_rhub.num_ports;
@@ -684,12 +670,10 @@ int xhci_mtk_sch_init(struct xhci_hcd_mtk *mtk)
 	if (sch_array == NULL)
 		return -ENOMEM;
 
-	for (i = 0; i < num_usb_bus; i++)
-		INIT_LIST_HEAD(&sch_array[i].bw_ep_list);
-
 	mtk->sch_array = sch_array;
 
 	INIT_LIST_HEAD(&mtk->bw_ep_chk_list);
+	hash_init(mtk->sch_ep_hash);
 
 	return 0;
 }
@@ -713,9 +697,7 @@ static int add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
 	ep_index = xhci_get_endpoint_index(&ep->desc);
 	ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
 
-	xhci_dbg(xhci, "%s %s\n", __func__, decode_ep(ep, udev->speed));
-
-	if (!need_bw_sch(ep, udev->speed, !!virt_dev->tt_info)) {
+	if (!need_bw_sch(udev, ep)) {
 		/*
 		 * set @bpkts to 1 if it is LS or FS periodic endpoint, and its
 		 * device does not connected through an external HS hub
@@ -727,13 +709,16 @@ static int add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
 		return 0;
 	}
 
-	sch_ep = create_sch_ep(udev, ep, ep_ctx);
+	xhci_dbg(xhci, "%s %s\n", __func__, decode_ep(ep, udev->speed));
+
+	sch_ep = create_sch_ep(mtk, udev, ep, ep_ctx);
 	if (IS_ERR_OR_NULL(sch_ep))
 		return -ENOMEM;
 
 	setup_sch_info(ep_ctx, sch_ep);
 
 	list_add_tail(&sch_ep->endpoint, &mtk->bw_ep_chk_list);
+	hash_add(mtk->sch_ep_hash, &sch_ep->hentry, (unsigned long)ep);
 
 	return 0;
 }
@@ -743,22 +728,18 @@ static void drop_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
 {
 	struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
-	struct xhci_virt_device *virt_dev;
-	struct mu3h_sch_bw_info *sch_bw;
-	struct mu3h_sch_ep_info *sch_ep, *tmp;
-
-	virt_dev = xhci->devs[udev->slot_id];
-
-	xhci_dbg(xhci, "%s %s\n", __func__, decode_ep(ep, udev->speed));
+	struct mu3h_sch_ep_info *sch_ep;
+	struct hlist_node *hn;
 
-	if (!need_bw_sch(ep, udev->speed, !!virt_dev->tt_info))
+	if (!need_bw_sch(udev, ep))
 		return;
 
-	sch_bw = get_bw_info(mtk, udev, ep);
+	xhci_err(xhci, "%s %s\n", __func__, decode_ep(ep, udev->speed));
 
-	list_for_each_entry_safe(sch_ep, tmp, &sch_bw->bw_ep_list, endpoint) {
+	hash_for_each_possible_safe(mtk->sch_ep_hash, sch_ep,
+				    hn, hentry, (unsigned long)ep) {
 		if (sch_ep->ep == ep) {
-			destroy_sch_ep(udev, sch_bw, sch_ep);
+			destroy_sch_ep(mtk, udev, sch_ep);
 			break;
 		}
 	}
@@ -769,30 +750,22 @@ int xhci_mtk_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
 	struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 	struct xhci_virt_device *virt_dev = xhci->devs[udev->slot_id];
-	struct mu3h_sch_bw_info *sch_bw;
-	struct mu3h_sch_ep_info *sch_ep, *tmp;
+	struct mu3h_sch_ep_info *sch_ep;
 	int ret;
 
 	xhci_dbg(xhci, "%s() udev %s\n", __func__, dev_name(&udev->dev));
 
 	list_for_each_entry(sch_ep, &mtk->bw_ep_chk_list, endpoint) {
-		sch_bw = get_bw_info(mtk, udev, sch_ep->ep);
+		struct xhci_ep_ctx *ep_ctx;
+		struct usb_host_endpoint *ep = sch_ep->ep;
+		unsigned int ep_index = xhci_get_endpoint_index(&ep->desc);
 
-		ret = check_sch_bw(sch_bw, sch_ep);
+		ret = check_sch_bw(sch_ep);
 		if (ret) {
 			xhci_err(xhci, "Not enough bandwidth! (%s)\n",
 				 sch_error_string(-ret));
 			return -ENOSPC;
 		}
-	}
-
-	list_for_each_entry_safe(sch_ep, tmp, &mtk->bw_ep_chk_list, endpoint) {
-		struct xhci_ep_ctx *ep_ctx;
-		struct usb_host_endpoint *ep = sch_ep->ep;
-		unsigned int ep_index = xhci_get_endpoint_index(&ep->desc);
-
-		sch_bw = get_bw_info(mtk, udev, ep);
-		list_move_tail(&sch_ep->endpoint, &sch_bw->bw_ep_list);
 
 		ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
 		ep_ctx->reserved[0] = cpu_to_le32(EP_BPKTS(sch_ep->pkts)
@@ -806,22 +779,23 @@ int xhci_mtk_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
 			sch_ep->offset, sch_ep->repeat);
 	}
 
-	return xhci_check_bandwidth(hcd, udev);
+	ret = xhci_check_bandwidth(hcd, udev);
+	if (!ret)
+		INIT_LIST_HEAD(&mtk->bw_ep_chk_list);
+
+	return ret;
 }
 
 void xhci_mtk_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
 {
 	struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
-	struct mu3h_sch_bw_info *sch_bw;
 	struct mu3h_sch_ep_info *sch_ep, *tmp;
 
 	xhci_dbg(xhci, "%s() udev %s\n", __func__, dev_name(&udev->dev));
 
-	list_for_each_entry_safe(sch_ep, tmp, &mtk->bw_ep_chk_list, endpoint) {
-		sch_bw = get_bw_info(mtk, udev, sch_ep->ep);
-		destroy_sch_ep(udev, sch_bw, sch_ep);
-	}
+	list_for_each_entry_safe(sch_ep, tmp, &mtk->bw_ep_chk_list, endpoint)
+		destroy_sch_ep(mtk, udev, sch_ep);
 
 	xhci_reset_bandwidth(hcd, udev);
 }
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 2548976bcf05..c53f6f276d5c 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -56,6 +56,27 @@
 /* u2_phy_pll register */
 #define CTRL_U2_FORCE_PLL_STB	BIT(28)
 
+/* xHCI CSR */
+#define LS_EOF_CFG		0x930
+#define LSEOF_OFFSET		0x89
+
+#define FS_EOF_CFG		0x934
+#define FSEOF_OFFSET		0x2e
+
+#define SS_GEN1_EOF_CFG		0x93c
+#define SSG1EOF_OFFSET		0x78
+
+#define HFCNTR_CFG		0x944
+#define ITP_DELTA_CLK		(0xa << 1)
+#define ITP_DELTA_CLK_MASK	GENMASK(5, 1)
+#define FRMCNT_LEV1_RANG	(0x12b << 8)
+#define FRMCNT_LEV1_RANG_MASK	GENMASK(19, 8)
+
+#define SS_GEN2_EOF_CFG		0x990
+#define SSG2EOF_OFFSET		0x3c
+
+#define XSEOF_OFFSET_MASK	GENMASK(11, 0)
+
 /* usb remote wakeup registers in syscon */
 
 /* mt8173 etc */
@@ -86,6 +107,46 @@ enum ssusb_uwk_vers {
 	SSUSB_UWK_V1_2,		/* specific revision 1.2 */
 };
 
+/*
+ * MT8195 has 4 controllers, the controller1~3's default SOF/ITP interval
+ * is calculated from the frame counter clock 24M, but in fact, the clock
+ * is 48M, add workaround for it.
+ */
+static void xhci_mtk_set_frame_interval(struct xhci_hcd_mtk *mtk)
+{
+	struct device *dev = mtk->dev;
+	struct usb_hcd *hcd = mtk->hcd;
+	u32 value;
+
+	if (!of_device_is_compatible(dev->of_node, "mediatek,mt8195-xhci"))
+		return;
+
+	value = readl(hcd->regs + HFCNTR_CFG);
+	value &= ~(ITP_DELTA_CLK_MASK | FRMCNT_LEV1_RANG_MASK);
+	value |= (ITP_DELTA_CLK | FRMCNT_LEV1_RANG);
+	writel(value, hcd->regs + HFCNTR_CFG);
+
+	value = readl(hcd->regs + LS_EOF_CFG);
+	value &= ~XSEOF_OFFSET_MASK;
+	value |= LSEOF_OFFSET;
+	writel(value, hcd->regs + LS_EOF_CFG);
+
+	value = readl(hcd->regs + FS_EOF_CFG);
+	value &= ~XSEOF_OFFSET_MASK;
+	value |= FSEOF_OFFSET;
+	writel(value, hcd->regs + FS_EOF_CFG);
+
+	value = readl(hcd->regs + SS_GEN1_EOF_CFG);
+	value &= ~XSEOF_OFFSET_MASK;
+	value |= SSG1EOF_OFFSET;
+	writel(value, hcd->regs + SS_GEN1_EOF_CFG);
+
+	value = readl(hcd->regs + SS_GEN2_EOF_CFG);
+	value &= ~XSEOF_OFFSET_MASK;
+	value |= SSG2EOF_OFFSET;
+	writel(value, hcd->regs + SS_GEN2_EOF_CFG);
+}
+
 static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk)
 {
 	struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
@@ -115,8 +176,11 @@ static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk)
 		writel(value, &ippc->u3_ctrl_p[i]);
 	}
 
-	/* power on and enable all u2 ports */
+	/* power on and enable all u2 ports except skipped ones */
 	for (i = 0; i < mtk->num_u2_ports; i++) {
+		if (BIT(i) & mtk->u2p_dis_msk)
+			continue;
+
 		value = readl(&ippc->u2_ctrl_p[i]);
 		value &= ~(CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);
 		value |= CTRL_U2_PORT_HOST_SEL;
@@ -163,8 +227,11 @@ static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk)
 		writel(value, &ippc->u3_ctrl_p[i]);
 	}
 
-	/* power down all u2 ports */
+	/* power down all u2 ports except skipped ones */
 	for (i = 0; i < mtk->num_u2_ports; i++) {
+		if (BIT(i) & mtk->u2p_dis_msk)
+			continue;
+
 		value = readl(&ippc->u2_ctrl_p[i]);
 		value |= CTRL_U2_PORT_PDN;
 		writel(value, &ippc->u2_ctrl_p[i]);
@@ -361,6 +428,9 @@ static int xhci_mtk_setup(struct usb_hcd *hcd)
 		ret = xhci_mtk_ssusb_config(mtk);
 		if (ret)
 			return ret;
+
+		/* workaround only for mt8195 */
+		xhci_mtk_set_frame_interval(mtk);
 	}
 
 	ret = xhci_gen_setup(hcd, xhci_mtk_quirks);
@@ -444,6 +514,8 @@ static int xhci_mtk_probe(struct platform_device *pdev)
 	/* optional property, ignore the error if it does not exist */
 	of_property_read_u32(node, "mediatek,u3p-dis-msk",
 			     &mtk->u3p_dis_msk);
+	of_property_read_u32(node, "mediatek,u2p-dis-msk",
+			     &mtk->u2p_dis_msk);
 
 	ret = usb_wakeup_of_property_parse(mtk, node);
 	if (ret) {
@@ -569,7 +641,7 @@ disable_ldos:
 	xhci_mtk_ldos_disable(mtk);
 
 disable_pm:
-	pm_runtime_put_sync_autosuspend(dev);
+	pm_runtime_put_noidle(dev);
 	pm_runtime_disable(dev);
 	return ret;
 }
@@ -704,6 +776,7 @@ static const struct dev_pm_ops xhci_mtk_pm_ops = {
 
 static const struct of_device_id mtk_xhci_of_match[] = {
 	{ .compatible = "mediatek,mt8173-xhci"},
+	{ .compatible = "mediatek,mt8195-xhci"},
 	{ .compatible = "mediatek,mtk-xhci"},
 	{ },
 };
diff --git a/drivers/usb/host/xhci-mtk.h b/drivers/usb/host/xhci-mtk.h
index ace432356c41..4b1ea89f959a 100644
--- a/drivers/usb/host/xhci-mtk.h
+++ b/drivers/usb/host/xhci-mtk.h
@@ -10,18 +10,23 @@
 #define _XHCI_MTK_H_
 
 #include <linux/clk.h>
+#include <linux/hashtable.h>
 
 #include "xhci.h"
 
 #define BULK_CLKS_NUM	5
 
+/* support at most 64 ep, use 32 size hash table */
+#define SCH_EP_HASH_BITS	5
+
 /**
  * To simplify scheduler algorithm, set a upper limit for ESIT,
  * if a synchromous ep's ESIT is larger than @XHCI_MTK_MAX_ESIT,
  * round down to the limit value, that means allocating more
  * bandwidth to it.
  */
-#define XHCI_MTK_MAX_ESIT	64
+#define XHCI_MTK_MAX_ESIT	(1 << 6)
+#define XHCI_MTK_BW_INDEX(x)	((x) & (XHCI_MTK_MAX_ESIT - 1))
 
 /**
  * @fs_bus_bw: array to keep track of bandwidth already used for FS
@@ -36,25 +41,26 @@ struct mu3h_sch_tt {
  * struct mu3h_sch_bw_info: schedule information for bandwidth domain
  *
  * @bus_bw: array to keep track of bandwidth already used at each uframes
- * @bw_ep_list: eps in the bandwidth domain
  *
  * treat a HS root port as a bandwidth domain, but treat a SS root port as
  * two bandwidth domains, one for IN eps and another for OUT eps.
  */
 struct mu3h_sch_bw_info {
 	u32 bus_bw[XHCI_MTK_MAX_ESIT];
-	struct list_head bw_ep_list;
 };
 
 /**
  * struct mu3h_sch_ep_info: schedule information for endpoint
  *
  * @esit: unit is 125us, equal to 2 << Interval field in ep-context
+ * @num_esit: number of @esit in a period
  * @num_budget_microframes: number of continuous uframes
  *		(@repeat==1) scheduled within the interval
  * @bw_cost_per_microframe: bandwidth cost per microframe
+ * @hentry: hash table entry
  * @endpoint: linked into bandwidth domain which it belongs to
  * @tt_endpoint: linked into mu3h_sch_tt's list which it belongs to
+ * @bw_info: bandwidth domain which this endpoint belongs
  * @sch_tt: mu3h_sch_tt linked into
  * @ep_type: endpoint type
  * @maxpkt: max packet size of endpoint
@@ -79,10 +85,13 @@ struct mu3h_sch_bw_info {
  */
 struct mu3h_sch_ep_info {
 	u32 esit;
+	u32 num_esit;
 	u32 num_budget_microframes;
 	u32 bw_cost_per_microframe;
 	struct list_head endpoint;
+	struct hlist_node hentry;
 	struct list_head tt_endpoint;
+	struct mu3h_sch_bw_info *bw_info;
 	struct mu3h_sch_tt *sch_tt;
 	u32 ep_type;
 	u32 maxpkt;
@@ -135,9 +144,11 @@ struct xhci_hcd_mtk {
 	struct usb_hcd *hcd;
 	struct mu3h_sch_bw_info *sch_array;
 	struct list_head bw_ep_chk_list;
+	DECLARE_HASHTABLE(sch_ep_hash, SCH_EP_HASH_BITS);
 	struct mu3c_ippc_regs __iomem *ippc_regs;
 	int num_u2_ports;
 	int num_u3_ports;
+	int u2p_dis_msk;
 	int u3p_dis_msk;
 	struct regulator *vusb33;
 	struct regulator *vbus;
diff --git a/drivers/usb/host/xhci-pci-renesas.c b/drivers/usb/host/xhci-pci-renesas.c
index 5923844ed821..52599d96634f 100644
--- a/drivers/usb/host/xhci-pci-renesas.c
+++ b/drivers/usb/host/xhci-pci-renesas.c
@@ -207,7 +207,8 @@ static int renesas_check_rom_state(struct pci_dev *pdev)
 			return 0;
 
 		case RENESAS_ROM_STATUS_NO_RESULT: /* No result yet */
-			return 0;
+			dev_dbg(&pdev->dev, "Unknown ROM status ...\n");
+			return -ENOENT;
 
 		case RENESAS_ROM_STATUS_ERROR: /* Error State */
 		default: /* All other states are marked as "Reserved states" */
@@ -224,14 +225,6 @@ static int renesas_fw_check_running(struct pci_dev *pdev)
 	u8 fw_state;
 	int err;
 
-	/* Check if device has ROM and loaded, if so skip everything */
-	err = renesas_check_rom(pdev);
-	if (err) { /* we have rom */
-		err = renesas_check_rom_state(pdev);
-		if (!err)
-			return err;
-	}
-
 	/*
 	 * Test if the device is actually needing the firmware. As most
 	 * BIOSes will initialize the device for us. If the device is
@@ -591,21 +584,39 @@ int renesas_xhci_check_request_fw(struct pci_dev *pdev,
 			(struct xhci_driver_data *)id->driver_data;
 	const char *fw_name = driver_data->firmware;
 	const struct firmware *fw;
+	bool has_rom;
 	int err;
 
+	/* Check if device has ROM and loaded, if so skip everything */
+	has_rom = renesas_check_rom(pdev);
+	if (has_rom) {
+		err = renesas_check_rom_state(pdev);
+		if (!err)
+			return 0;
+		else if (err != -ENOENT)
+			has_rom = false;
+	}
+
 	err = renesas_fw_check_running(pdev);
 	/* Continue ahead, if the firmware is already running. */
-	if (err == 0)
+	if (!err)
 		return 0;
 
+	/* no firmware interface available */
 	if (err != 1)
-		return err;
+		return has_rom ? 0 : err;
 
 	pci_dev_get(pdev);
-	err = request_firmware(&fw, fw_name, &pdev->dev);
+	err = firmware_request_nowarn(&fw, fw_name, &pdev->dev);
 	pci_dev_put(pdev);
 	if (err) {
-		dev_err(&pdev->dev, "request_firmware failed: %d\n", err);
+		if (has_rom) {
+			dev_info(&pdev->dev, "failed to load firmware %s, fallback to ROM\n",
+				 fw_name);
+			return 0;
+		}
+		dev_err(&pdev->dev, "failed to load firmware %s: %d\n",
+			fw_name, err);
 		return err;
 	}
 
@@ -620,9 +631,4 @@ exit:
 }
 EXPORT_SYMBOL_GPL(renesas_xhci_check_request_fw);
 
-void renesas_xhci_pci_exit(struct pci_dev *dev)
-{
-}
-EXPORT_SYMBOL_GPL(renesas_xhci_pci_exit);
-
 MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 1c9a7957c45c..2c9f25ca8edd 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -449,8 +449,6 @@ static void xhci_pci_remove(struct pci_dev *dev)
 	struct xhci_hcd *xhci;
 
 	xhci = hcd_to_xhci(pci_get_drvdata(dev));
-	if (xhci->quirks & XHCI_RENESAS_FW_QUIRK)
-		renesas_xhci_pci_exit(dev);
 
 	xhci->xhc_state |= XHCI_STATE_REMOVING;
 
diff --git a/drivers/usb/host/xhci-pci.h b/drivers/usb/host/xhci-pci.h
index acd7cf0a1706..cb9a8f331a44 100644
--- a/drivers/usb/host/xhci-pci.h
+++ b/drivers/usb/host/xhci-pci.h
@@ -7,7 +7,6 @@
 #if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
 int renesas_xhci_check_request_fw(struct pci_dev *dev,
 				  const struct pci_device_id *id);
-void renesas_xhci_pci_exit(struct pci_dev *dev);
 
 #else
 static int renesas_xhci_check_request_fw(struct pci_dev *dev,
@@ -16,8 +15,6 @@ static int renesas_xhci_check_request_fw(struct pci_dev *dev,
 	return 0;
 }
 
-static void renesas_xhci_pci_exit(struct pci_dev *dev) { };
-
 #endif
 
 struct xhci_driver_data {
diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
index 1bc4fe7b8c75..9888ba7d85b6 100644
--- a/drivers/usb/host/xhci-rcar.c
+++ b/drivers/usb/host/xhci-rcar.c
@@ -134,6 +134,13 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd)
 	const struct soc_device_attribute *attr;
 	const char *firmware_name;
 
+	/*
+	 * According to the datasheet, "Upon the completion of FW Download,
+	 * there is no need to write or reload FW".
+	 */
+	if (readl(regs + RCAR_USB3_DL_CTRL) & RCAR_USB3_DL_CTRL_FW_SUCCESS)
+		return 0;
+
 	attr = soc_device_match(rcar_quirks_match);
 	if (attr)
 		quirks = (uintptr_t)attr->data;
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 8fea44bbc266..e676749f543b 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -830,9 +830,14 @@ static void xhci_giveback_invalidated_tds(struct xhci_virt_ep *ep)
 
 		ring = xhci_urb_to_transfer_ring(ep->xhci, td->urb);
 
-		if (td->cancel_status == TD_CLEARED)
+		if (td->cancel_status == TD_CLEARED) {
+			xhci_dbg(ep->xhci, "%s: Giveback cancelled URB %p TD\n",
+				 __func__, td->urb);
 			xhci_td_cleanup(ep->xhci, td, ring, td->status);
-
+		} else {
+			xhci_dbg(ep->xhci, "%s: Keep cancelled URB %p TD as cancel_status is %d\n",
+				 __func__, td->urb, td->cancel_status);
+		}
 		if (ep->xhci->xhc_state & XHCI_STATE_DYING)
 			return;
 	}
@@ -850,6 +855,10 @@ static int xhci_reset_halted_ep(struct xhci_hcd *xhci, unsigned int slot_id,
 		goto done;
 	}
 
+	xhci_dbg(xhci, "%s-reset ep %u, slot %u\n",
+		 (reset_type == EP_HARD_RESET) ? "Hard" : "Soft",
+		 ep_index, slot_id);
+
 	ret = xhci_queue_reset_ep(xhci, command, slot_id, ep_index, reset_type);
 done:
 	if (ret)
@@ -883,7 +892,8 @@ static int xhci_handle_halted_endpoint(struct xhci_hcd *xhci,
 	}
 
 	if (ep->ep_state & EP_HALTED) {
-		xhci_dbg(xhci, "Reset ep command already pending\n");
+		xhci_dbg(xhci, "Reset ep command for ep_index %d already pending\n",
+			 ep->ep_index);
 		return 0;
 	}
 
@@ -922,9 +932,10 @@ static int xhci_invalidate_cancelled_tds(struct xhci_virt_ep *ep)
 
 	list_for_each_entry_safe(td, tmp_td, &ep->cancelled_td_list, cancelled_td_list) {
 		xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
-				"Removing canceled TD starting at 0x%llx (dma).",
-				(unsigned long long)xhci_trb_virt_to_dma(
-					td->start_seg, td->first_trb));
+			       "Removing canceled TD starting at 0x%llx (dma) in stream %u URB %p",
+			       (unsigned long long)xhci_trb_virt_to_dma(
+				       td->start_seg, td->first_trb),
+			       td->urb->stream_id, td->urb);
 		list_del_init(&td->td_list);
 		ring = xhci_urb_to_transfer_ring(xhci, td->urb);
 		if (!ring) {
@@ -942,17 +953,21 @@ static int xhci_invalidate_cancelled_tds(struct xhci_virt_ep *ep)
 					 td->urb->stream_id);
 		hw_deq &= ~0xf;
 
-		if (td->cancel_status == TD_HALTED) {
-			cached_td = td;
-		} else if (trb_in_td(xhci, td->start_seg, td->first_trb,
-			      td->last_trb, hw_deq, false)) {
+		if (td->cancel_status == TD_HALTED ||
+		    trb_in_td(xhci, td->start_seg, td->first_trb, td->last_trb, hw_deq, false)) {
 			switch (td->cancel_status) {
 			case TD_CLEARED: /* TD is already no-op */
 			case TD_CLEARING_CACHE: /* set TR deq command already queued */
 				break;
 			case TD_DIRTY: /* TD is cached, clear it */
 			case TD_HALTED:
-				/* FIXME  stream case, several stopped rings */
+				td->cancel_status = TD_CLEARING_CACHE;
+				if (cached_td)
+					/* FIXME  stream case, several stopped rings */
+					xhci_dbg(xhci,
+						 "Move dq past stream %u URB %p instead of stream %u URB %p\n",
+						 td->urb->stream_id, td->urb,
+						 cached_td->urb->stream_id, cached_td->urb);
 				cached_td = td;
 				break;
 			}
@@ -961,18 +976,24 @@ static int xhci_invalidate_cancelled_tds(struct xhci_virt_ep *ep)
 			td->cancel_status = TD_CLEARED;
 		}
 	}
-	if (cached_td) {
-		cached_td->cancel_status = TD_CLEARING_CACHE;
 
-		err = xhci_move_dequeue_past_td(xhci, slot_id, ep->ep_index,
-						cached_td->urb->stream_id,
-						cached_td);
-		/* Failed to move past cached td, try just setting it noop */
-		if (err) {
-			td_to_noop(xhci, ring, cached_td, false);
-			cached_td->cancel_status = TD_CLEARED;
+	/* If there's no need to move the dequeue pointer then we're done */
+	if (!cached_td)
+		return 0;
+
+	err = xhci_move_dequeue_past_td(xhci, slot_id, ep->ep_index,
+					cached_td->urb->stream_id,
+					cached_td);
+	if (err) {
+		/* Failed to move past cached td, just set cached TDs to no-op */
+		list_for_each_entry_safe(td, tmp_td, &ep->cancelled_td_list, cancelled_td_list) {
+			if (td->cancel_status != TD_CLEARING_CACHE)
+				continue;
+			xhci_dbg(xhci, "Failed to clear cancelled cached URB %p, mark clear anyway\n",
+				 td->urb);
+			td_to_noop(xhci, ring, td, false);
+			td->cancel_status = TD_CLEARED;
 		}
-		cached_td = NULL;
 	}
 	return 0;
 }
@@ -1069,6 +1090,8 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
 			return;
 		case EP_STATE_RUNNING:
 			/* Race, HW handled stop ep cmd before ep was running */
+			xhci_dbg(xhci, "Stop ep completion ctx error, ep is running\n");
+
 			command = xhci_alloc_command(xhci, false, GFP_ATOMIC);
 			if (!command)
 				xhci_stop_watchdog_timer_in_irq(xhci, ep);
@@ -1212,6 +1235,7 @@ void xhci_stop_endpoint_command_watchdog(struct timer_list *t)
 	struct xhci_hcd *xhci = ep->xhci;
 	unsigned long flags;
 	u32 usbsts;
+	char str[XHCI_MSG_MAX];
 
 	spin_lock_irqsave(&xhci->lock, flags);
 
@@ -1225,7 +1249,7 @@ void xhci_stop_endpoint_command_watchdog(struct timer_list *t)
 	usbsts = readl(&xhci->op_regs->status);
 
 	xhci_warn(xhci, "xHCI host not responding to stop endpoint command.\n");
-	xhci_warn(xhci, "USBSTS:%s\n", xhci_decode_usbsts(usbsts));
+	xhci_warn(xhci, "USBSTS:%s\n", xhci_decode_usbsts(str, usbsts));
 
 	ep->ep_state &= ~EP_STOP_CMD_PENDING;
 
@@ -1389,7 +1413,12 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
 		ep_ring = xhci_urb_to_transfer_ring(ep->xhci, td->urb);
 		if (td->cancel_status == TD_CLEARING_CACHE) {
 			td->cancel_status = TD_CLEARED;
+			xhci_dbg(ep->xhci, "%s: Giveback cancelled URB %p TD\n",
+				 __func__, td->urb);
 			xhci_td_cleanup(ep->xhci, td, ep_ring, td->status);
+		} else {
+			xhci_dbg(ep->xhci, "%s: Keep cancelled URB %p TD as cancel_status is %d\n",
+				 __func__, td->urb, td->cancel_status);
 		}
 	}
 cleanup:
@@ -2002,7 +2031,8 @@ cleanup:
 	 * bits are still set.  When an event occurs, switch over to
 	 * polling to avoid losing status changes.
 	 */
-	xhci_dbg(xhci, "%s: starting port polling.\n", __func__);
+	xhci_dbg(xhci, "%s: starting usb%d port polling.\n",
+		 __func__, hcd->self.busnum);
 	set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 	spin_unlock(&xhci->lock);
 	/* Pass this up to the core */
diff --git a/drivers/usb/host/xhci-trace.h b/drivers/usb/host/xhci-trace.h
index 627abd236dbe..a5da02077297 100644
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -25,8 +25,6 @@
 #include "xhci.h"
 #include "xhci-dbgcap.h"
 
-#define XHCI_MSG_MAX	500
-
 DECLARE_EVENT_CLASS(xhci_log_msg,
 	TP_PROTO(struct va_format *vaf),
 	TP_ARGS(vaf),
@@ -122,6 +120,7 @@ DECLARE_EVENT_CLASS(xhci_log_trb,
 		__field(u32, field1)
 		__field(u32, field2)
 		__field(u32, field3)
+		__dynamic_array(char, str, XHCI_MSG_MAX)
 	),
 	TP_fast_assign(
 		__entry->type = ring->type;
@@ -131,7 +130,7 @@ DECLARE_EVENT_CLASS(xhci_log_trb,
 		__entry->field3 = le32_to_cpu(trb->field[3]);
 	),
 	TP_printk("%s: %s", xhci_ring_type_string(__entry->type),
-			xhci_decode_trb(__entry->field0, __entry->field1,
+		  xhci_decode_trb(__get_str(str), XHCI_MSG_MAX, __entry->field0, __entry->field1,
 					__entry->field2, __entry->field3)
 	)
 );
@@ -323,6 +322,7 @@ DECLARE_EVENT_CLASS(xhci_log_ep_ctx,
 		__field(u32, info2)
 		__field(u64, deq)
 		__field(u32, tx_info)
+		__dynamic_array(char, str, XHCI_MSG_MAX)
 	),
 	TP_fast_assign(
 		__entry->info = le32_to_cpu(ctx->ep_info);
@@ -330,8 +330,8 @@ DECLARE_EVENT_CLASS(xhci_log_ep_ctx,
 		__entry->deq = le64_to_cpu(ctx->deq);
 		__entry->tx_info = le32_to_cpu(ctx->tx_info);
 	),
-	TP_printk("%s", xhci_decode_ep_context(__entry->info,
-		__entry->info2, __entry->deq, __entry->tx_info)
+	TP_printk("%s", xhci_decode_ep_context(__get_str(str),
+		__entry->info, __entry->info2, __entry->deq, __entry->tx_info)
 	)
 );
 
@@ -368,6 +368,7 @@ DECLARE_EVENT_CLASS(xhci_log_slot_ctx,
 		__field(u32, info2)
 		__field(u32, tt_info)
 		__field(u32, state)
+		__dynamic_array(char, str, XHCI_MSG_MAX)
 	),
 	TP_fast_assign(
 		__entry->info = le32_to_cpu(ctx->dev_info);
@@ -375,9 +376,9 @@ DECLARE_EVENT_CLASS(xhci_log_slot_ctx,
 		__entry->tt_info = le64_to_cpu(ctx->tt_info);
 		__entry->state = le32_to_cpu(ctx->dev_state);
 	),
-	TP_printk("%s", xhci_decode_slot_context(__entry->info,
-			__entry->info2, __entry->tt_info,
-			__entry->state)
+	TP_printk("%s", xhci_decode_slot_context(__get_str(str),
+			__entry->info, __entry->info2,
+			__entry->tt_info, __entry->state)
 	)
 );
 
@@ -432,12 +433,13 @@ DECLARE_EVENT_CLASS(xhci_log_ctrl_ctx,
 	TP_STRUCT__entry(
 		__field(u32, drop)
 		__field(u32, add)
+		__dynamic_array(char, str, XHCI_MSG_MAX)
 	),
 	TP_fast_assign(
 		__entry->drop = le32_to_cpu(ctrl_ctx->drop_flags);
 		__entry->add = le32_to_cpu(ctrl_ctx->add_flags);
 	),
-	TP_printk("%s", xhci_decode_ctrl_ctx(__entry->drop, __entry->add)
+	TP_printk("%s", xhci_decode_ctrl_ctx(__get_str(str), __entry->drop, __entry->add)
 	)
 );
 
@@ -523,6 +525,7 @@ DECLARE_EVENT_CLASS(xhci_log_portsc,
 		    TP_STRUCT__entry(
 				     __field(u32, portnum)
 				     __field(u32, portsc)
+				     __dynamic_array(char, str, XHCI_MSG_MAX)
 				     ),
 		    TP_fast_assign(
 				   __entry->portnum = portnum;
@@ -530,7 +533,7 @@ DECLARE_EVENT_CLASS(xhci_log_portsc,
 				   ),
 		    TP_printk("port-%d: %s",
 			      __entry->portnum,
-			      xhci_decode_portsc(__entry->portsc)
+			      xhci_decode_portsc(__get_str(str), __entry->portsc)
 			      )
 );
 
@@ -555,13 +558,14 @@ DECLARE_EVENT_CLASS(xhci_log_doorbell,
 	TP_STRUCT__entry(
 		__field(u32, slot)
 		__field(u32, doorbell)
+		__dynamic_array(char, str, XHCI_MSG_MAX)
 	),
 	TP_fast_assign(
 		__entry->slot = slot;
 		__entry->doorbell = doorbell;
 	),
 	TP_printk("Ring doorbell for %s",
-		xhci_decode_doorbell(__entry->slot, __entry->doorbell)
+		  xhci_decode_doorbell(__get_str(str), __entry->slot, __entry->doorbell)
 	)
 );
 
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 3618070eba78..f3dabd02382c 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -993,7 +993,8 @@ int xhci_suspend(struct xhci_hcd *xhci, bool do_wakeup)
 	xhci_dbc_suspend(xhci);
 
 	/* Don't poll the roothubs on bus suspend. */
-	xhci_dbg(xhci, "%s: stopping port polling.\n", __func__);
+	xhci_dbg(xhci, "%s: stopping usb%d port polling.\n",
+		 __func__, hcd->self.busnum);
 	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 	del_timer_sync(&hcd->rh_timer);
 	clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
@@ -1257,7 +1258,8 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 		usb_asmedia_modifyflowcontrol(to_pci_dev(hcd->self.controller));
 
 	/* Re-enable port polling. */
-	xhci_dbg(xhci, "%s: starting port polling.\n", __func__);
+	xhci_dbg(xhci, "%s: starting usb%d port polling.\n",
+		 __func__, hcd->self.busnum);
 	set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
 	usb_hcd_poll_rh_status(xhci->shared_hcd);
 	set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
@@ -4705,19 +4707,19 @@ static u16 xhci_calculate_u1_timeout(struct xhci_hcd *xhci,
 {
 	unsigned long long timeout_ns;
 
-	if (xhci->quirks & XHCI_INTEL_HOST)
-		timeout_ns = xhci_calculate_intel_u1_timeout(udev, desc);
-	else
-		timeout_ns = udev->u1_params.sel;
-
 	/* Prevent U1 if service interval is shorter than U1 exit latency */
 	if (usb_endpoint_xfer_int(desc) || usb_endpoint_xfer_isoc(desc)) {
-		if (xhci_service_interval_to_ns(desc) <= timeout_ns) {
+		if (xhci_service_interval_to_ns(desc) <= udev->u1_params.mel) {
 			dev_dbg(&udev->dev, "Disable U1, ESIT shorter than exit latency\n");
 			return USB3_LPM_DISABLED;
 		}
 	}
 
+	if (xhci->quirks & XHCI_INTEL_HOST)
+		timeout_ns = xhci_calculate_intel_u1_timeout(udev, desc);
+	else
+		timeout_ns = udev->u1_params.sel;
+
 	/* The U1 timeout is encoded in 1us intervals.
 	 * Don't return a timeout of zero, because that's USB3_LPM_DISABLED.
 	 */
@@ -4769,19 +4771,19 @@ static u16 xhci_calculate_u2_timeout(struct xhci_hcd *xhci,
 {
 	unsigned long long timeout_ns;
 
-	if (xhci->quirks & XHCI_INTEL_HOST)
-		timeout_ns = xhci_calculate_intel_u2_timeout(udev, desc);
-	else
-		timeout_ns = udev->u2_params.sel;
-
 	/* Prevent U2 if service interval is shorter than U2 exit latency */
 	if (usb_endpoint_xfer_int(desc) || usb_endpoint_xfer_isoc(desc)) {
-		if (xhci_service_interval_to_ns(desc) <= timeout_ns) {
+		if (xhci_service_interval_to_ns(desc) <= udev->u2_params.mel) {
 			dev_dbg(&udev->dev, "Disable U2, ESIT shorter than exit latency\n");
 			return USB3_LPM_DISABLED;
 		}
 	}
 
+	if (xhci->quirks & XHCI_INTEL_HOST)
+		timeout_ns = xhci_calculate_intel_u2_timeout(udev, desc);
+	else
+		timeout_ns = udev->u2_params.sel;
+
 	/* The U2 timeout is encoded in 256us intervals */
 	timeout_ns = DIV_ROUND_UP_ULL(timeout_ns, 256 * 1000);
 	/* If the necessary timeout value is bigger than what we can set in the
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 3c7d281672ae..dca6181c33fd 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -22,6 +22,9 @@
 #include	"xhci-ext-caps.h"
 #include "pci-quirks.h"
 
+/* max buffer size for trace and debug messages */
+#define XHCI_MSG_MAX		500
+
 /* xHCI PCI Configuration Registers */
 #define XHCI_SBRN_OFFSET	(0x60)
 
@@ -2235,15 +2238,14 @@ static inline char *xhci_slot_state_string(u32 state)
 	}
 }
 
-static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
-		u32 field3)
+static inline const char *xhci_decode_trb(char *str, size_t size,
+					  u32 field0, u32 field1, u32 field2, u32 field3)
 {
-	static char str[256];
 	int type = TRB_FIELD_TO_TYPE(field3);
 
 	switch (type) {
 	case TRB_LINK:
-		sprintf(str,
+		snprintf(str, size,
 			"LINK %08x%08x intr %d type '%s' flags %c:%c:%c:%c",
 			field1, field0, GET_INTR_TARGET(field2),
 			xhci_trb_type_string(type),
@@ -2260,7 +2262,7 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 	case TRB_HC_EVENT:
 	case TRB_DEV_NOTE:
 	case TRB_MFINDEX_WRAP:
-		sprintf(str,
+		snprintf(str, size,
 			"TRB %08x%08x status '%s' len %d slot %d ep %d type '%s' flags %c:%c",
 			field1, field0,
 			xhci_trb_comp_code_string(GET_COMP_CODE(field2)),
@@ -2273,7 +2275,8 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 
 		break;
 	case TRB_SETUP:
-		sprintf(str, "bRequestType %02x bRequest %02x wValue %02x%02x wIndex %02x%02x wLength %d length %d TD size %d intr %d type '%s' flags %c:%c:%c",
+		snprintf(str, size,
+			"bRequestType %02x bRequest %02x wValue %02x%02x wIndex %02x%02x wLength %d length %d TD size %d intr %d type '%s' flags %c:%c:%c",
 				field0 & 0xff,
 				(field0 & 0xff00) >> 8,
 				(field0 & 0xff000000) >> 24,
@@ -2290,7 +2293,8 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 				field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_DATA:
-		sprintf(str, "Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c:%c:%c:%c",
+		snprintf(str, size,
+			 "Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c:%c:%c:%c",
 				field1, field0, TRB_LEN(field2), GET_TD_SIZE(field2),
 				GET_INTR_TARGET(field2),
 				xhci_trb_type_string(type),
@@ -2303,7 +2307,8 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 				field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_STATUS:
-		sprintf(str, "Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c",
+		snprintf(str, size,
+			 "Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c",
 				field1, field0, TRB_LEN(field2), GET_TD_SIZE(field2),
 				GET_INTR_TARGET(field2),
 				xhci_trb_type_string(type),
@@ -2316,7 +2321,7 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 	case TRB_ISOC:
 	case TRB_EVENT_DATA:
 	case TRB_TR_NOOP:
-		sprintf(str,
+		snprintf(str, size,
 			"Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c:%c:%c:%c:%c",
 			field1, field0, TRB_LEN(field2), GET_TD_SIZE(field2),
 			GET_INTR_TARGET(field2),
@@ -2333,21 +2338,21 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 
 	case TRB_CMD_NOOP:
 	case TRB_ENABLE_SLOT:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: flags %c",
 			xhci_trb_type_string(type),
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_DISABLE_SLOT:
 	case TRB_NEG_BANDWIDTH:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: slot %d flags %c",
 			xhci_trb_type_string(type),
 			TRB_TO_SLOT_ID(field3),
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_ADDR_DEV:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: ctx %08x%08x slot %d flags %c:%c",
 			xhci_trb_type_string(type),
 			field1, field0,
@@ -2356,7 +2361,7 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_CONFIG_EP:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: ctx %08x%08x slot %d flags %c:%c",
 			xhci_trb_type_string(type),
 			field1, field0,
@@ -2365,7 +2370,7 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_EVAL_CONTEXT:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: ctx %08x%08x slot %d flags %c",
 			xhci_trb_type_string(type),
 			field1, field0,
@@ -2373,7 +2378,7 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_RESET_EP:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: ctx %08x%08x slot %d ep %d flags %c:%c",
 			xhci_trb_type_string(type),
 			field1, field0,
@@ -2394,7 +2399,7 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_SET_DEQ:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: deq %08x%08x stream %d slot %d ep %d flags %c",
 			xhci_trb_type_string(type),
 			field1, field0,
@@ -2405,14 +2410,14 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_RESET_DEV:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: slot %d flags %c",
 			xhci_trb_type_string(type),
 			TRB_TO_SLOT_ID(field3),
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_FORCE_EVENT:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: event %08x%08x vf intr %d vf id %d flags %c",
 			xhci_trb_type_string(type),
 			field1, field0,
@@ -2421,14 +2426,14 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_SET_LT:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: belt %d flags %c",
 			xhci_trb_type_string(type),
 			TRB_TO_BELT(field3),
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_GET_BW:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: ctx %08x%08x slot %d speed %d flags %c",
 			xhci_trb_type_string(type),
 			field1, field0,
@@ -2437,7 +2442,7 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_FORCE_HEADER:
-		sprintf(str,
+		snprintf(str, size,
 			"%s: info %08x%08x%08x pkt type %d roothub port %d flags %c",
 			xhci_trb_type_string(type),
 			field2, field1, field0 & 0xffffffe0,
@@ -2446,7 +2451,7 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	default:
-		sprintf(str,
+		snprintf(str, size,
 			"type '%s' -> raw %08x %08x %08x %08x",
 			xhci_trb_type_string(type),
 			field0, field1, field2, field3);
@@ -2455,10 +2460,9 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 	return str;
 }
 
-static inline const char *xhci_decode_ctrl_ctx(unsigned long drop,
-					       unsigned long add)
+static inline const char *xhci_decode_ctrl_ctx(char *str,
+		unsigned long drop, unsigned long add)
 {
-	static char	str[1024];
 	unsigned int	bit;
 	int		ret = 0;
 
@@ -2484,10 +2488,9 @@ static inline const char *xhci_decode_ctrl_ctx(unsigned long drop,
 	return str;
 }
 
-static inline const char *xhci_decode_slot_context(u32 info, u32 info2,
-		u32 tt_info, u32 state)
+static inline const char *xhci_decode_slot_context(char *str,
+		u32 info, u32 info2, u32 tt_info, u32 state)
 {
-	static char str[1024];
 	u32 speed;
 	u32 hub;
 	u32 mtt;
@@ -2571,9 +2574,8 @@ static inline const char *xhci_portsc_link_state_string(u32 portsc)
 	return "Unknown";
 }
 
-static inline const char *xhci_decode_portsc(u32 portsc)
+static inline const char *xhci_decode_portsc(char *str, u32 portsc)
 {
-	static char str[256];
 	int ret;
 
 	ret = sprintf(str, "%s %s %s Link:%s PortSpeed:%d ",
@@ -2617,9 +2619,8 @@ static inline const char *xhci_decode_portsc(u32 portsc)
 	return str;
 }
 
-static inline const char *xhci_decode_usbsts(u32 usbsts)
+static inline const char *xhci_decode_usbsts(char *str, u32 usbsts)
 {
-	static char str[256];
 	int ret = 0;
 
 	if (usbsts == ~(u32)0)
@@ -2646,9 +2647,8 @@ static inline const char *xhci_decode_usbsts(u32 usbsts)
 	return str;
 }
 
-static inline const char *xhci_decode_doorbell(u32 slot, u32 doorbell)
+static inline const char *xhci_decode_doorbell(char *str, u32 slot, u32 doorbell)
 {
-	static char str[256];
 	u8 ep;
 	u16 stream;
 	int ret;
@@ -2715,10 +2715,9 @@ static inline const char *xhci_ep_type_string(u8 type)
 	}
 }
 
-static inline const char *xhci_decode_ep_context(u32 info, u32 info2, u64 deq,
-		u32 tx_info)
+static inline const char *xhci_decode_ep_context(char *str, u32 info,
+		u32 info2, u64 deq, u32 tx_info)
 {
-	static char str[1024];
 	int ret;
 
 	u32 esit;
diff --git a/drivers/usb/isp1760/isp1760-core.c b/drivers/usb/isp1760/isp1760-core.c
index ff07e2890692..d1d9a7d5da17 100644
--- a/drivers/usb/isp1760/isp1760-core.c
+++ b/drivers/usb/isp1760/isp1760-core.c
@@ -30,6 +30,7 @@ static int isp1760_init_core(struct isp1760_device *isp)
 {
 	struct isp1760_hcd *hcd = &isp->hcd;
 	struct isp1760_udc *udc = &isp->udc;
+	u32 otg_ctrl;
 
 	/* Low-level chip reset */
 	if (isp->rst_gpio) {
@@ -83,16 +84,17 @@ static int isp1760_init_core(struct isp1760_device *isp)
 	 *
 	 * TODO: Really support OTG. For now we configure port 1 in device mode
 	 */
-	if (((isp->devflags & ISP1760_FLAG_ISP1761) ||
-	     (isp->devflags & ISP1760_FLAG_ISP1763)) &&
-	    (isp->devflags & ISP1760_FLAG_PERIPHERAL_EN)) {
-		isp1760_field_set(hcd->fields, HW_DM_PULLDOWN);
-		isp1760_field_set(hcd->fields, HW_DP_PULLDOWN);
-		isp1760_field_set(hcd->fields, HW_OTG_DISABLE);
-	} else {
-		isp1760_field_set(hcd->fields, HW_SW_SEL_HC_DC);
-		isp1760_field_set(hcd->fields, HW_VBUS_DRV);
-		isp1760_field_set(hcd->fields, HW_SEL_CP_EXT);
+	if (isp->devflags & ISP1760_FLAG_ISP1761) {
+		if (isp->devflags & ISP1760_FLAG_PERIPHERAL_EN) {
+			otg_ctrl = (ISP176x_HW_DM_PULLDOWN_CLEAR |
+				    ISP176x_HW_DP_PULLDOWN_CLEAR |
+				    ISP176x_HW_OTG_DISABLE);
+		} else {
+			otg_ctrl = (ISP176x_HW_SW_SEL_HC_DC_CLEAR |
+				    ISP176x_HW_VBUS_DRV |
+				    ISP176x_HW_SEL_CP_EXT);
+		}
+		isp1760_reg_write(hcd->regs, ISP176x_HC_OTG_CTRL, otg_ctrl);
 	}
 
 	dev_info(isp->dev, "%s bus width: %u, oc: %s\n",
@@ -235,20 +237,20 @@ static const struct reg_field isp1760_hc_reg_fields[] = {
 	[HC_ISO_IRQ_MASK_AND]	= REG_FIELD(ISP176x_HC_ISO_IRQ_MASK_AND, 0, 31),
 	[HC_INT_IRQ_MASK_AND]	= REG_FIELD(ISP176x_HC_INT_IRQ_MASK_AND, 0, 31),
 	[HC_ATL_IRQ_MASK_AND]	= REG_FIELD(ISP176x_HC_ATL_IRQ_MASK_AND, 0, 31),
-	[HW_OTG_DISABLE]	= REG_FIELD(ISP176x_HC_OTG_CTRL_SET, 10, 10),
-	[HW_SW_SEL_HC_DC]	= REG_FIELD(ISP176x_HC_OTG_CTRL_SET, 7, 7),
-	[HW_VBUS_DRV]		= REG_FIELD(ISP176x_HC_OTG_CTRL_SET, 4, 4),
-	[HW_SEL_CP_EXT]		= REG_FIELD(ISP176x_HC_OTG_CTRL_SET, 3, 3),
-	[HW_DM_PULLDOWN]	= REG_FIELD(ISP176x_HC_OTG_CTRL_SET, 2, 2),
-	[HW_DP_PULLDOWN]	= REG_FIELD(ISP176x_HC_OTG_CTRL_SET, 1, 1),
-	[HW_DP_PULLUP]		= REG_FIELD(ISP176x_HC_OTG_CTRL_SET, 0, 0),
-	[HW_OTG_DISABLE_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL_CLEAR, 10, 10),
-	[HW_SW_SEL_HC_DC_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL_CLEAR, 7, 7),
-	[HW_VBUS_DRV_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL_CLEAR, 4, 4),
-	[HW_SEL_CP_EXT_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL_CLEAR, 3, 3),
-	[HW_DM_PULLDOWN_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL_CLEAR, 2, 2),
-	[HW_DP_PULLDOWN_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL_CLEAR, 1, 1),
-	[HW_DP_PULLUP_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL_CLEAR, 0, 0),
+	[HW_OTG_DISABLE_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 26, 26),
+	[HW_SW_SEL_HC_DC_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 23, 23),
+	[HW_VBUS_DRV_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 20, 20),
+	[HW_SEL_CP_EXT_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 19, 19),
+	[HW_DM_PULLDOWN_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 18, 18),
+	[HW_DP_PULLDOWN_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 17, 17),
+	[HW_DP_PULLUP_CLEAR]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 16, 16),
+	[HW_OTG_DISABLE]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 10, 10),
+	[HW_SW_SEL_HC_DC]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 7, 7),
+	[HW_VBUS_DRV]		= REG_FIELD(ISP176x_HC_OTG_CTRL, 4, 4),
+	[HW_SEL_CP_EXT]		= REG_FIELD(ISP176x_HC_OTG_CTRL, 3, 3),
+	[HW_DM_PULLDOWN]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 2, 2),
+	[HW_DP_PULLDOWN]	= REG_FIELD(ISP176x_HC_OTG_CTRL, 1, 1),
+	[HW_DP_PULLUP]		= REG_FIELD(ISP176x_HC_OTG_CTRL, 0, 0),
 };
 
 static const struct reg_field isp1763_hc_reg_fields[] = {
@@ -491,7 +493,7 @@ int isp1760_register(struct resource *mem, int irq, unsigned long irqflags,
 		       (devflags & ISP1760_FLAG_ISP1761));
 
 	if ((!IS_ENABLED(CONFIG_USB_ISP1760_HCD) || usb_disabled()) &&
-	    (!IS_ENABLED(CONFIG_USB_ISP1761_UDC) || !udc_enabled))
+	    (!udc_enabled || !IS_ENABLED(CONFIG_USB_ISP1761_UDC)))
 		return -ENODEV;
 
 	isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL);
@@ -571,7 +573,7 @@ int isp1760_register(struct resource *mem, int irq, unsigned long irqflags,
 			return ret;
 	}
 
-	if (IS_ENABLED(CONFIG_USB_ISP1761_UDC) && udc_enabled) {
+	if (udc_enabled && IS_ENABLED(CONFIG_USB_ISP1761_UDC)) {
 		ret = isp1760_udc_register(isp, irq, irqflags);
 		if (ret < 0) {
 			isp1760_hcd_unregister(hcd);
diff --git a/drivers/usb/isp1760/isp1760-hcd.c b/drivers/usb/isp1760/isp1760-hcd.c
index 27168b4a4ef2..79d571f1429b 100644
--- a/drivers/usb/isp1760/isp1760-hcd.c
+++ b/drivers/usb/isp1760/isp1760-hcd.c
@@ -182,7 +182,7 @@ struct urb_listitem {
 	struct urb *urb;
 };
 
-static const u32 isp1763_hc_portsc1_fields[] = {
+static const u32 isp176x_hc_portsc1_fields[] = {
 	[PORT_OWNER]		= BIT(13),
 	[PORT_POWER]		= BIT(12),
 	[PORT_LSTATUS]		= BIT(10),
@@ -205,27 +205,28 @@ static u32 isp1760_hcd_read(struct usb_hcd *hcd, u32 field)
 }
 
 /*
- * We need, in isp1763, to write directly the values to the portsc1
+ * We need, in isp176x, to write directly the values to the portsc1
  * register so it will make the other values to trigger.
  */
 static void isp1760_hcd_portsc1_set_clear(struct isp1760_hcd *priv, u32 field,
 					  u32 val)
 {
-	u32 bit = isp1763_hc_portsc1_fields[field];
-	u32 port_status = readl(priv->base + ISP1763_HC_PORTSC1);
+	u32 bit = isp176x_hc_portsc1_fields[field];
+	u16 portsc1_reg = priv->is_isp1763 ? ISP1763_HC_PORTSC1 :
+		ISP176x_HC_PORTSC1;
+	u32 port_status = readl(priv->base + portsc1_reg);
 
 	if (val)
-		writel(port_status | bit, priv->base + ISP1763_HC_PORTSC1);
+		writel(port_status | bit, priv->base + portsc1_reg);
 	else
-		writel(port_status & ~bit, priv->base + ISP1763_HC_PORTSC1);
+		writel(port_status & ~bit, priv->base + portsc1_reg);
 }
 
 static void isp1760_hcd_write(struct usb_hcd *hcd, u32 field, u32 val)
 {
 	struct isp1760_hcd *priv = hcd_to_priv(hcd);
 
-	if (unlikely(priv->is_isp1763 &&
-		     (field >= PORT_OWNER && field <= PORT_CONNECT)))
+	if (unlikely((field >= PORT_OWNER && field <= PORT_CONNECT)))
 		return isp1760_hcd_portsc1_set_clear(priv, field, val);
 
 	isp1760_field_write(priv->fields, field, val);
@@ -250,7 +251,7 @@ static int isp1760_hcd_set_and_wait(struct usb_hcd *hcd, u32 field,
 	isp1760_hcd_set(hcd, field);
 
 	return regmap_field_read_poll_timeout(priv->fields[field], val,
-					      val, 10, timeout_us);
+					      val, 0, timeout_us);
 }
 
 static int isp1760_hcd_set_and_wait_swap(struct usb_hcd *hcd, u32 field,
@@ -262,7 +263,7 @@ static int isp1760_hcd_set_and_wait_swap(struct usb_hcd *hcd, u32 field,
 	isp1760_hcd_set(hcd, field);
 
 	return regmap_field_read_poll_timeout(priv->fields[field], val,
-					      !val, 10, timeout_us);
+					      !val, 0, timeout_us);
 }
 
 static int isp1760_hcd_clear_and_wait(struct usb_hcd *hcd, u32 field,
@@ -274,7 +275,7 @@ static int isp1760_hcd_clear_and_wait(struct usb_hcd *hcd, u32 field,
 	isp1760_hcd_clear(hcd, field);
 
 	return regmap_field_read_poll_timeout(priv->fields[field], val,
-					      !val, 10, timeout_us);
+					      !val, 0, timeout_us);
 }
 
 static bool isp1760_hcd_is_set(struct usb_hcd *hcd, u32 field)
@@ -367,8 +368,7 @@ static void isp1760_mem_read(struct usb_hcd *hcd, u32 src_offset, void *dst,
 {
 	struct isp1760_hcd *priv = hcd_to_priv(hcd);
 
-	isp1760_hcd_write(hcd, MEM_BANK_SEL, ISP_BANK_0);
-	isp1760_hcd_write(hcd, MEM_START_ADDR, src_offset);
+	isp1760_reg_write(priv->regs, ISP176x_HC_MEMORY, src_offset);
 	ndelay(100);
 
 	bank_reads8(priv->base, src_offset, ISP_BANK_0, dst, bytes);
@@ -496,8 +496,7 @@ static void isp1760_ptd_read(struct usb_hcd *hcd, u32 ptd_offset, u32 slot,
 	u16 src_offset = ptd_offset + slot * sizeof(*ptd);
 	struct isp1760_hcd *priv = hcd_to_priv(hcd);
 
-	isp1760_hcd_write(hcd, MEM_BANK_SEL, ISP_BANK_0);
-	isp1760_hcd_write(hcd, MEM_START_ADDR, src_offset);
+	isp1760_reg_write(priv->regs, ISP176x_HC_MEMORY, src_offset);
 	ndelay(90);
 
 	bank_reads8(priv->base, src_offset, ISP_BANK_0, (void *)ptd,
@@ -588,8 +587,8 @@ static void init_memory(struct isp1760_hcd *priv)
 
 	payload_addr = PAYLOAD_OFFSET;
 
-	for (i = 0, curr = 0; i < ARRAY_SIZE(mem->blocks); i++) {
-		for (j = 0; j < mem->blocks[i]; j++, curr++) {
+	for (i = 0, curr = 0; i < ARRAY_SIZE(mem->blocks); i++, curr += j) {
+		for (j = 0; j < mem->blocks[i]; j++) {
 			priv->memory_pool[curr + j].start = payload_addr;
 			priv->memory_pool[curr + j].size = mem->blocks_size[i];
 			priv->memory_pool[curr + j].free = 1;
@@ -731,12 +730,15 @@ static int isp1760_hc_setup(struct usb_hcd *hcd)
 
 	isp1760_hcd_write(hcd, HC_SCRATCH, pattern);
 
-	/* Change bus pattern */
-	scratch = isp1760_hcd_read(hcd, HC_CHIP_ID_HIGH);
-	dev_err(hcd->self.controller, "Scratch test 0x%08x\n", scratch);
+	/*
+	 * we do not care about the read value here we just want to
+	 * change bus pattern.
+	 */
+	isp1760_hcd_read(hcd, HC_CHIP_ID_HIGH);
 	scratch = isp1760_hcd_read(hcd, HC_SCRATCH);
 	if (scratch != pattern) {
-		dev_err(hcd->self.controller, "Scratch test failed. 0x%08x\n", scratch);
+		dev_err(hcd->self.controller, "Scratch test failed. 0x%08x\n",
+			scratch);
 		return -ENODEV;
 	}
 
@@ -1826,9 +1828,11 @@ static void packetize_urb(struct usb_hcd *hcd,
 			goto cleanup;
 
 		if (len > mem->blocks_size[ISP176x_BLOCK_NUM - 1])
-			len = mem->blocks_size[ISP176x_BLOCK_NUM - 1];
+			this_qtd_len = mem->blocks_size[ISP176x_BLOCK_NUM - 1];
+		else
+			this_qtd_len = len;
 
-		this_qtd_len = qtd_fill(qtd, buf, len);
+		this_qtd_len = qtd_fill(qtd, buf, this_qtd_len);
 		list_add_tail(&qtd->qtd_list, head);
 
 		len -= this_qtd_len;
@@ -1851,7 +1855,7 @@ static void packetize_urb(struct usb_hcd *hcd,
 				packet_type = OUT_PID;
 			else
 				packet_type = IN_PID;
-		} else if (usb_pipebulk(urb->pipe)
+		} else if (usb_pipebulk(urb->pipe) && maxpacketsize
 				&& (urb->transfer_flags & URB_ZERO_PACKET)
 				&& !(urb->transfer_buffer_length %
 							maxpacketsize)) {
@@ -1916,7 +1920,6 @@ static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 	if (list_empty(&new_qtds))
 		return -ENOMEM;
 
-	retval = 0;
 	spin_lock_irqsave(&priv->lock, spinflags);
 
 	if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
@@ -1972,16 +1975,20 @@ static void kill_transfer(struct usb_hcd *hcd, struct urb *urb,
 	/* We need to forcefully reclaim the slot since some transfers never
 	   return, e.g. interrupt transfers and NAKed bulk transfers. */
 	if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe)) {
-		skip_map = isp1760_hcd_read(hcd, HC_ATL_PTD_SKIPMAP);
-		skip_map |= (1 << qh->slot);
-		isp1760_hcd_write(hcd, HC_ATL_PTD_SKIPMAP, skip_map);
-		ndelay(100);
+		if (qh->slot != -1) {
+			skip_map = isp1760_hcd_read(hcd, HC_ATL_PTD_SKIPMAP);
+			skip_map |= (1 << qh->slot);
+			isp1760_hcd_write(hcd, HC_ATL_PTD_SKIPMAP, skip_map);
+			ndelay(100);
+		}
 		priv->atl_slots[qh->slot].qh = NULL;
 		priv->atl_slots[qh->slot].qtd = NULL;
 	} else {
-		skip_map = isp1760_hcd_read(hcd, HC_INT_PTD_SKIPMAP);
-		skip_map |= (1 << qh->slot);
-		isp1760_hcd_write(hcd, HC_INT_PTD_SKIPMAP, skip_map);
+		if (qh->slot != -1) {
+			skip_map = isp1760_hcd_read(hcd, HC_INT_PTD_SKIPMAP);
+			skip_map |= (1 << qh->slot);
+			isp1760_hcd_write(hcd, HC_INT_PTD_SKIPMAP, skip_map);
+		}
 		priv->int_slots[qh->slot].qh = NULL;
 		priv->int_slots[qh->slot].qtd = NULL;
 	}
@@ -2528,17 +2535,23 @@ int __init isp1760_init_kmem_once(void)
 			SLAB_MEM_SPREAD, NULL);
 
 	if (!qtd_cachep)
-		return -ENOMEM;
+		goto destroy_urb_listitem;
 
 	qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
 			0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
 
-	if (!qh_cachep) {
-		kmem_cache_destroy(qtd_cachep);
-		return -ENOMEM;
-	}
+	if (!qh_cachep)
+		goto destroy_qtd;
 
 	return 0;
+
+destroy_qtd:
+	kmem_cache_destroy(qtd_cachep);
+
+destroy_urb_listitem:
+	kmem_cache_destroy(urb_listitem_cachep);
+
+	return -ENOMEM;
 }
 
 void isp1760_deinit_kmem_cache(void)
diff --git a/drivers/usb/isp1760/isp1760-regs.h b/drivers/usb/isp1760/isp1760-regs.h
index 94ea60c20b2a..3a6751197e97 100644
--- a/drivers/usb/isp1760/isp1760-regs.h
+++ b/drivers/usb/isp1760/isp1760-regs.h
@@ -61,6 +61,7 @@
 #define ISP176x_HC_INT_IRQ_MASK_AND	0x328
 #define ISP176x_HC_ATL_IRQ_MASK_AND	0x32c
 
+#define ISP176x_HC_OTG_CTRL		0x374
 #define ISP176x_HC_OTG_CTRL_SET		0x374
 #define ISP176x_HC_OTG_CTRL_CLEAR	0x376
 
@@ -179,6 +180,21 @@ enum isp176x_host_controller_fields {
 #define ISP176x_DC_IESUSP		BIT(3)
 #define ISP176x_DC_IEBRST		BIT(0)
 
+#define ISP176x_HW_OTG_DISABLE_CLEAR	BIT(26)
+#define ISP176x_HW_SW_SEL_HC_DC_CLEAR	BIT(23)
+#define ISP176x_HW_VBUS_DRV_CLEAR	BIT(20)
+#define ISP176x_HW_SEL_CP_EXT_CLEAR	BIT(19)
+#define ISP176x_HW_DM_PULLDOWN_CLEAR	BIT(18)
+#define ISP176x_HW_DP_PULLDOWN_CLEAR	BIT(17)
+#define ISP176x_HW_DP_PULLUP_CLEAR	BIT(16)
+#define ISP176x_HW_OTG_DISABLE		BIT(10)
+#define ISP176x_HW_SW_SEL_HC_DC		BIT(7)
+#define ISP176x_HW_VBUS_DRV		BIT(4)
+#define ISP176x_HW_SEL_CP_EXT		BIT(3)
+#define ISP176x_HW_DM_PULLDOWN		BIT(2)
+#define ISP176x_HW_DP_PULLDOWN		BIT(1)
+#define ISP176x_HW_DP_PULLUP		BIT(0)
+
 #define ISP176x_DC_ENDPTYP_ISOC		0x01
 #define ISP176x_DC_ENDPTYP_BULK		0x02
 #define ISP176x_DC_ENDPTYP_INTERRUPT	0x03
diff --git a/drivers/usb/isp1760/isp1760-udc.c b/drivers/usb/isp1760/isp1760-udc.c
index a78da59d6417..5cafd23345ca 100644
--- a/drivers/usb/isp1760/isp1760-udc.c
+++ b/drivers/usb/isp1760/isp1760-udc.c
@@ -1363,7 +1363,7 @@ static irqreturn_t isp1760_udc_irq(int irq, void *dev)
 
 	status = isp1760_udc_irq_get_status(udc);
 
-	if (status & DC_IEVBUS) {
+	if (status & ISP176x_DC_IEVBUS) {
 		dev_dbg(udc->isp->dev, "%s(VBUS)\n", __func__);
 		/* The VBUS interrupt is only triggered when VBUS appears. */
 		spin_lock(&udc->lock);
@@ -1371,7 +1371,7 @@ static irqreturn_t isp1760_udc_irq(int irq, void *dev)
 		spin_unlock(&udc->lock);
 	}
 
-	if (status & DC_IEBRST) {
+	if (status & ISP176x_DC_IEBRST) {
 		dev_dbg(udc->isp->dev, "%s(BRST)\n", __func__);
 
 		isp1760_udc_reset(udc);
@@ -1391,18 +1391,18 @@ static irqreturn_t isp1760_udc_irq(int irq, void *dev)
 		}
 	}
 
-	if (status & DC_IEP0SETUP) {
+	if (status & ISP176x_DC_IEP0SETUP) {
 		dev_dbg(udc->isp->dev, "%s(EP0SETUP)\n", __func__);
 
 		isp1760_ep0_setup(udc);
 	}
 
-	if (status & DC_IERESM) {
+	if (status & ISP176x_DC_IERESM) {
 		dev_dbg(udc->isp->dev, "%s(RESM)\n", __func__);
 		isp1760_udc_resume(udc);
 	}
 
-	if (status & DC_IESUSP) {
+	if (status & ISP176x_DC_IESUSP) {
 		dev_dbg(udc->isp->dev, "%s(SUSP)\n", __func__);
 
 		spin_lock(&udc->lock);
@@ -1413,7 +1413,7 @@ static irqreturn_t isp1760_udc_irq(int irq, void *dev)
 		spin_unlock(&udc->lock);
 	}
 
-	if (status & DC_IEHS_STA) {
+	if (status & ISP176x_DC_IEHS_STA) {
 		dev_dbg(udc->isp->dev, "%s(HS_STA)\n", __func__);
 		udc->gadget.speed = USB_SPEED_HIGH;
 	}
diff --git a/drivers/usb/misc/adutux.c b/drivers/usb/misc/adutux.c
index 6d15a097b007..ed6a19254d2f 100644
--- a/drivers/usb/misc/adutux.c
+++ b/drivers/usb/misc/adutux.c
@@ -394,13 +394,10 @@ static ssize_t adu_read(struct file *file, __user char *buffer, size_t count,
 			spin_lock_irqsave (&dev->buflock, flags);
 			if (dev->read_buffer_length) {
 				/* we secure access to the primary */
-				char *tmp;
 				dev_dbg(&dev->udev->dev,
 					"%s : swap, read_buffer_length = %d\n",
 					__func__, dev->read_buffer_length);
-				tmp = dev->read_buffer_secondary;
-				dev->read_buffer_secondary = dev->read_buffer_primary;
-				dev->read_buffer_primary = tmp;
+				swap(dev->read_buffer_primary, dev->read_buffer_secondary);
 				dev->secondary_head = 0;
 				dev->secondary_tail = dev->read_buffer_length;
 				dev->read_buffer_length = 0;
diff --git a/drivers/usb/misc/brcmstb-usb-pinmap.c b/drivers/usb/misc/brcmstb-usb-pinmap.c
index 336653091e3b..2b2019c19cde 100644
--- a/drivers/usb/misc/brcmstb-usb-pinmap.c
+++ b/drivers/usb/misc/brcmstb-usb-pinmap.c
@@ -293,6 +293,8 @@ static int __init brcmstb_usb_pinmap_probe(struct platform_device *pdev)
 
 		/* Enable interrupt for out pins */
 		irq = platform_get_irq(pdev, 0);
+		if (irq < 0)
+			return irq;
 		err = devm_request_irq(&pdev->dev, irq,
 				       brcmstb_usb_pinmap_ovr_isr,
 				       IRQF_TRIGGER_RISING,
diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h
index 5546b868b08b..022bbdc54e68 100644
--- a/drivers/usb/mtu3/mtu3.h
+++ b/drivers/usb/mtu3/mtu3.h
@@ -199,6 +199,7 @@ struct mtu3_gpd_ring {
 * @id_nb : notifier for iddig(idpin) detection
 * @dr_work : work for drd mode switch, used to avoid sleep in atomic context
 * @desired_role : role desired to switch
+* @default_role : default mode while usb role is USB_ROLE_NONE
 * @role_sw : use USB Role Switch to support dual-role switch, can't use
 *		extcon at the same time, and extcon is deprecated.
 * @role_sw_used : true when the USB Role Switch is used.
@@ -212,6 +213,7 @@ struct otg_switch_mtk {
 	struct notifier_block id_nb;
 	struct work_struct dr_work;
 	enum usb_role desired_role;
+	enum usb_role default_role;
 	struct usb_role_switch *role_sw;
 	bool role_sw_used;
 	bool is_u3_drd;
@@ -226,6 +228,9 @@ struct otg_switch_mtk {
  *		host only, device only or dual-role mode
  * @u2_ports: number of usb2.0 host ports
  * @u3_ports: number of usb3.0 host ports
+ * @u2p_dis_msk: mask of disabling usb2 ports, e.g. bit0==1 to
+ *		disable u2port0, bit1==1 to disable u2port1,... etc,
+ *		but when use dual-role mode, can't disable u2port0
  * @u3p_dis_msk: mask of disabling usb3 ports, for example, bit0==1 to
  *		disable u3port0, bit1==1 to disable u3port1,... etc
  * @dbgfs_root: only used when supports manual dual-role switch via debugfs
@@ -241,6 +246,7 @@ struct ssusb_mtk {
 	void __iomem *ippc_base;
 	struct phy **phys;
 	int num_phys;
+	int wakeup_irq;
 	/* common power & clock */
 	struct regulator *vusb33;
 	struct clk_bulk_data clks[BULK_CLKS_CNT];
@@ -250,6 +256,7 @@ struct ssusb_mtk {
 	bool is_host;
 	int u2_ports;
 	int u3_ports;
+	int u2p_dis_msk;
 	int u3p_dis_msk;
 	struct dentry *dbgfs_root;
 	/* usb wakeup for host mode */
@@ -349,6 +356,7 @@ struct mtu3 {
 	unsigned is_u3_ip:1;
 	unsigned delayed_status:1;
 	unsigned gen2cp:1;
+	unsigned connected:1;
 
 	u8 address;
 	u8 test_mode_nr;
diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index 562f4357831e..c4a2c37abf62 100644
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -141,6 +141,28 @@ static void mtu3_device_disable(struct mtu3 *mtu)
 	mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
 }
 
+static void mtu3_dev_power_on(struct mtu3 *mtu)
+{
+	void __iomem *ibase = mtu->ippc_base;
+
+	mtu3_clrbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
+	if (mtu->is_u3_ip)
+		mtu3_clrbits(ibase, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
+
+	mtu3_clrbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
+}
+
+static void mtu3_dev_power_down(struct mtu3 *mtu)
+{
+	void __iomem *ibase = mtu->ippc_base;
+
+	if (mtu->is_u3_ip)
+		mtu3_setbits(ibase, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
+
+	mtu3_setbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
+	mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
+}
+
 /* reset U3D's device module. */
 static void mtu3_device_reset(struct mtu3 *mtu)
 {
@@ -227,11 +249,13 @@ static void mtu3_set_speed(struct mtu3 *mtu, enum usb_device_speed speed)
 		mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
 		break;
 	case USB_SPEED_SUPER:
+		mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
 		mtu3_clrbits(mtu->ippc_base, SSUSB_U3_CTRL(0),
 			     SSUSB_U3_PORT_SSP_SPEED);
 		break;
 	case USB_SPEED_SUPER_PLUS:
-			mtu3_setbits(mtu->ippc_base, SSUSB_U3_CTRL(0),
+		mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
+		mtu3_setbits(mtu->ippc_base, SSUSB_U3_CTRL(0),
 			     SSUSB_U3_PORT_SSP_SPEED);
 		break;
 	default:
@@ -333,12 +357,7 @@ void mtu3_start(struct mtu3 *mtu)
 	dev_dbg(mtu->dev, "%s devctl 0x%x\n", __func__,
 		mtu3_readl(mbase, U3D_DEVICE_CONTROL));
 
-	mtu3_clrbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
-	if (mtu->is_u3_ip)
-		mtu3_clrbits(mtu->ippc_base, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
-
-	mtu3_clrbits(mtu->ippc_base, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
-
+	mtu3_dev_power_on(mtu);
 	mtu3_csr_init(mtu);
 	mtu3_set_speed(mtu, mtu->speed);
 
@@ -360,12 +379,25 @@ void mtu3_stop(struct mtu3 *mtu)
 		mtu3_dev_on_off(mtu, 0);
 
 	mtu->is_active = 0;
+	mtu3_dev_power_down(mtu);
+}
 
-	if (mtu->is_u3_ip)
-		mtu3_setbits(mtu->ippc_base, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
+static void mtu3_dev_suspend(struct mtu3 *mtu)
+{
+	if (!mtu->is_active)
+		return;
 
-	mtu3_setbits(mtu->ippc_base, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
-	mtu3_setbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
+	mtu3_intr_disable(mtu);
+	mtu3_dev_power_down(mtu);
+}
+
+static void mtu3_dev_resume(struct mtu3 *mtu)
+{
+	if (!mtu->is_active)
+		return;
+
+	mtu3_dev_power_on(mtu);
+	mtu3_intr_enable(mtu);
 }
 
 /* for non-ep0 */
@@ -688,11 +720,15 @@ static irqreturn_t mtu3_link_isr(struct mtu3 *mtu)
 	mtu->g.speed = udev_speed;
 	mtu->g.ep0->maxpacket = maxpkt;
 	mtu->ep0_state = MU3D_EP0_STATE_SETUP;
+	mtu->connected = !!(udev_speed != USB_SPEED_UNKNOWN);
 
-	if (udev_speed == USB_SPEED_UNKNOWN)
+	if (udev_speed == USB_SPEED_UNKNOWN) {
 		mtu3_gadget_disconnect(mtu);
-	else
+		pm_runtime_put(mtu->dev);
+	} else {
+		pm_runtime_get(mtu->dev);
 		mtu3_ep0_setup(mtu);
+	}
 
 	return IRQ_HANDLED;
 }
@@ -888,9 +924,16 @@ int ssusb_gadget_init(struct ssusb_mtk *ssusb)
 	if (mtu == NULL)
 		return -ENOMEM;
 
-	mtu->irq = platform_get_irq(pdev, 0);
-	if (mtu->irq < 0)
-		return mtu->irq;
+	mtu->irq = platform_get_irq_byname_optional(pdev, "device");
+	if (mtu->irq < 0) {
+		if (mtu->irq == -EPROBE_DEFER)
+			return mtu->irq;
+
+		/* for backward compatibility */
+		mtu->irq = platform_get_irq(pdev, 0);
+		if (mtu->irq < 0)
+			return mtu->irq;
+	}
 	dev_info(dev, "irq %d\n", mtu->irq);
 
 	mtu->mac_base = devm_platform_ioremap_resource_byname(pdev, "mac");
@@ -965,3 +1008,47 @@ void ssusb_gadget_exit(struct ssusb_mtk *ssusb)
 	device_init_wakeup(ssusb->dev, false);
 	mtu3_hw_exit(mtu);
 }
+
+bool ssusb_gadget_ip_sleep_check(struct ssusb_mtk *ssusb)
+{
+	struct mtu3 *mtu = ssusb->u3d;
+
+	/* host only, should wait for ip sleep */
+	if (!mtu)
+		return true;
+
+	/* device is started and pullup D+, ip can sleep */
+	if (mtu->is_active && mtu->softconnect)
+		return true;
+
+	/* ip can't sleep if not pullup D+ when support device mode */
+	return false;
+}
+
+int ssusb_gadget_suspend(struct ssusb_mtk *ssusb, pm_message_t msg)
+{
+	struct mtu3 *mtu = ssusb->u3d;
+
+	if (!mtu->gadget_driver)
+		return 0;
+
+	if (mtu->connected)
+		return -EBUSY;
+
+	mtu3_dev_suspend(mtu);
+	synchronize_irq(mtu->irq);
+
+	return 0;
+}
+
+int ssusb_gadget_resume(struct ssusb_mtk *ssusb, pm_message_t msg)
+{
+	struct mtu3 *mtu = ssusb->u3d;
+
+	if (!mtu->gadget_driver)
+		return 0;
+
+	mtu3_dev_resume(mtu);
+
+	return 0;
+}
diff --git a/drivers/usb/mtu3/mtu3_dr.c b/drivers/usb/mtu3/mtu3_dr.c
index 318fbc618137..a6b04831b20b 100644
--- a/drivers/usb/mtu3/mtu3_dr.c
+++ b/drivers/usb/mtu3/mtu3_dr.c
@@ -137,14 +137,19 @@ static void ssusb_mode_sw_work(struct work_struct *work)
 
 	current_role = ssusb->is_host ? USB_ROLE_HOST : USB_ROLE_DEVICE;
 
-	if (desired_role == USB_ROLE_NONE)
+	if (desired_role == USB_ROLE_NONE) {
+		/* the default mode is host as probe does */
 		desired_role = USB_ROLE_HOST;
+		if (otg_sx->default_role == USB_ROLE_DEVICE)
+			desired_role = USB_ROLE_DEVICE;
+	}
 
 	if (current_role == desired_role)
 		return;
 
 	dev_dbg(ssusb->dev, "set role : %s\n", usb_role_string(desired_role));
 	mtu3_dbg_trace(ssusb->dev, "set role : %s", usb_role_string(desired_role));
+	pm_runtime_get_sync(ssusb->dev);
 
 	switch (desired_role) {
 	case USB_ROLE_HOST:
@@ -165,6 +170,7 @@ static void ssusb_mode_sw_work(struct work_struct *work)
 	default:
 		dev_err(ssusb->dev, "invalid role\n");
 	}
+	pm_runtime_put(ssusb->dev);
 }
 
 static void ssusb_set_mode(struct otg_switch_mtk *otg_sx, enum usb_role role)
@@ -274,17 +280,29 @@ static int ssusb_role_sw_register(struct otg_switch_mtk *otg_sx)
 {
 	struct usb_role_switch_desc role_sx_desc = { 0 };
 	struct ssusb_mtk *ssusb = otg_sx_to_ssusb(otg_sx);
+	struct device *dev = ssusb->dev;
+	enum usb_dr_mode mode;
 
 	if (!otg_sx->role_sw_used)
 		return 0;
 
+	mode = usb_get_role_switch_default_mode(dev);
+	if (mode == USB_DR_MODE_PERIPHERAL)
+		otg_sx->default_role = USB_ROLE_DEVICE;
+	else
+		otg_sx->default_role = USB_ROLE_HOST;
+
 	role_sx_desc.set = ssusb_role_sw_set;
 	role_sx_desc.get = ssusb_role_sw_get;
-	role_sx_desc.fwnode = dev_fwnode(ssusb->dev);
+	role_sx_desc.fwnode = dev_fwnode(dev);
 	role_sx_desc.driver_data = ssusb;
-	otg_sx->role_sw = usb_role_switch_register(ssusb->dev, &role_sx_desc);
+	otg_sx->role_sw = usb_role_switch_register(dev, &role_sx_desc);
+	if (IS_ERR(otg_sx->role_sw))
+		return PTR_ERR(otg_sx->role_sw);
 
-	return PTR_ERR_OR_ZERO(otg_sx->role_sw);
+	ssusb_set_mode(otg_sx, otg_sx->default_role);
+
+	return 0;
 }
 
 int ssusb_otg_switch_init(struct ssusb_mtk *ssusb)
diff --git a/drivers/usb/mtu3/mtu3_dr.h b/drivers/usb/mtu3/mtu3_dr.h
index 760fe7d69c6b..e325508bddf4 100644
--- a/drivers/usb/mtu3/mtu3_dr.h
+++ b/drivers/usb/mtu3/mtu3_dr.h
@@ -16,8 +16,8 @@ int ssusb_host_init(struct ssusb_mtk *ssusb, struct device_node *parent_dn);
 void ssusb_host_exit(struct ssusb_mtk *ssusb);
 int ssusb_wakeup_of_property_parse(struct ssusb_mtk *ssusb,
 				struct device_node *dn);
-int ssusb_host_enable(struct ssusb_mtk *ssusb);
-int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend);
+int ssusb_host_resume(struct ssusb_mtk *ssusb, bool p0_skipped);
+int ssusb_host_suspend(struct ssusb_mtk *ssusb);
 void ssusb_wakeup_set(struct ssusb_mtk *ssusb, bool enable);
 
 #else
@@ -38,12 +38,12 @@ static inline int ssusb_wakeup_of_property_parse(
 	return 0;
 }
 
-static inline int ssusb_host_enable(struct ssusb_mtk *ssusb)
+static inline int ssusb_host_resume(struct ssusb_mtk *ssusb, bool p0_skipped)
 {
 	return 0;
 }
 
-static inline int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend)
+static inline int ssusb_host_suspend(struct ssusb_mtk *ssusb)
 {
 	return 0;
 }
@@ -57,6 +57,10 @@ static inline void ssusb_wakeup_set(struct ssusb_mtk *ssusb, bool enable)
 #if IS_ENABLED(CONFIG_USB_MTU3_GADGET) || IS_ENABLED(CONFIG_USB_MTU3_DUAL_ROLE)
 int ssusb_gadget_init(struct ssusb_mtk *ssusb);
 void ssusb_gadget_exit(struct ssusb_mtk *ssusb);
+int ssusb_gadget_suspend(struct ssusb_mtk *ssusb, pm_message_t msg);
+int ssusb_gadget_resume(struct ssusb_mtk *ssusb, pm_message_t msg);
+bool ssusb_gadget_ip_sleep_check(struct ssusb_mtk *ssusb);
+
 #else
 static inline int ssusb_gadget_init(struct ssusb_mtk *ssusb)
 {
@@ -65,6 +69,24 @@ static inline int ssusb_gadget_init(struct ssusb_mtk *ssusb)
 
 static inline void ssusb_gadget_exit(struct ssusb_mtk *ssusb)
 {}
+
+static inline int
+ssusb_gadget_suspend(struct ssusb_mtk *ssusb, pm_message_t msg)
+{
+	return 0;
+}
+
+static inline int
+ssusb_gadget_resume(struct ssusb_mtk *ssusb, pm_message_t msg)
+{
+	return 0;
+}
+
+static inline bool ssusb_gadget_ip_sleep_check(struct ssusb_mtk *ssusb)
+{
+	return true;
+}
+
 #endif
 
 
diff --git a/drivers/usb/mtu3/mtu3_gadget.c b/drivers/usb/mtu3/mtu3_gadget.c
index 5e21ba05ebf0..a9a65b4bbfed 100644
--- a/drivers/usb/mtu3/mtu3_gadget.c
+++ b/drivers/usb/mtu3/mtu3_gadget.c
@@ -64,14 +64,12 @@ static int mtu3_ep_enable(struct mtu3_ep *mep)
 	u32 interval = 0;
 	u32 mult = 0;
 	u32 burst = 0;
-	int max_packet;
 	int ret;
 
 	desc = mep->desc;
 	comp_desc = mep->comp_desc;
 	mep->type = usb_endpoint_type(desc);
-	max_packet = usb_endpoint_maxp(desc);
-	mep->maxp = max_packet & GENMASK(10, 0);
+	mep->maxp = usb_endpoint_maxp(desc);
 
 	switch (mtu->g.speed) {
 	case USB_SPEED_SUPER:
@@ -92,7 +90,7 @@ static int mtu3_ep_enable(struct mtu3_ep *mep)
 				usb_endpoint_xfer_int(desc)) {
 			interval = desc->bInterval;
 			interval = clamp_val(interval, 1, 16) - 1;
-			burst = (max_packet & GENMASK(12, 11)) >> 11;
+			mult = usb_endpoint_maxp_mult(desc) - 1;
 		}
 		break;
 	default:
@@ -469,6 +467,8 @@ static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on)
 	dev_dbg(mtu->dev, "%s (%s) for %sactive device\n", __func__,
 		is_on ? "on" : "off", mtu->is_active ? "" : "in");
 
+	pm_runtime_get_sync(mtu->dev);
+
 	/* we'd rather not pullup unless the device is active. */
 	spin_lock_irqsave(&mtu->lock, flags);
 
@@ -482,6 +482,7 @@ static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on)
 	}
 
 	spin_unlock_irqrestore(&mtu->lock, flags);
+	pm_runtime_put(mtu->dev);
 
 	return 0;
 }
@@ -499,6 +500,7 @@ static int mtu3_gadget_start(struct usb_gadget *gadget,
 	}
 
 	dev_dbg(mtu->dev, "bind driver %s\n", driver->function);
+	pm_runtime_get_sync(mtu->dev);
 
 	spin_lock_irqsave(&mtu->lock, flags);
 
@@ -509,6 +511,7 @@ static int mtu3_gadget_start(struct usb_gadget *gadget,
 		mtu3_start(mtu);
 
 	spin_unlock_irqrestore(&mtu->lock, flags);
+	pm_runtime_put(mtu->dev);
 
 	return 0;
 }
diff --git a/drivers/usb/mtu3/mtu3_host.c b/drivers/usb/mtu3/mtu3_host.c
index 93a1a4c11e1e..f3903367a6a0 100644
--- a/drivers/usb/mtu3/mtu3_host.c
+++ b/drivers/usb/mtu3/mtu3_host.c
@@ -8,7 +8,6 @@
  */
 
 #include <linux/clk.h>
-#include <linux/iopoll.h>
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/mfd/syscon.h>
@@ -63,7 +62,7 @@ static void ssusb_wakeup_ip_sleep_set(struct ssusb_mtk *ssusb, bool enable)
 	case SSUSB_UWK_V1_1:
 		reg = ssusb->uwk_reg_base + PERI_WK_CTRL0;
 		msk = WC0_IS_EN | WC0_IS_C(0xf) | WC0_IS_P;
-		val = enable ? (WC0_IS_EN | WC0_IS_C(0x8)) : 0;
+		val = enable ? (WC0_IS_EN | WC0_IS_C(0x1)) : 0;
 		break;
 	case SSUSB_UWK_V1_2:
 		reg = ssusb->uwk_reg_base + PERI_WK_CTRL0;
@@ -126,7 +125,7 @@ static void host_ports_num_get(struct ssusb_mtk *ssusb)
 }
 
 /* only configure ports will be used later */
-int ssusb_host_enable(struct ssusb_mtk *ssusb)
+static int ssusb_host_enable(struct ssusb_mtk *ssusb)
 {
 	void __iomem *ibase = ssusb->ippc_base;
 	int num_u3p = ssusb->u3_ports;
@@ -155,6 +154,9 @@ int ssusb_host_enable(struct ssusb_mtk *ssusb)
 
 	/* power on and enable all u2 ports */
 	for (i = 0; i < num_u2p; i++) {
+		if ((0x1 << i) & ssusb->u2p_dis_msk)
+			continue;
+
 		value = mtu3_readl(ibase, SSUSB_U2_CTRL(i));
 		value &= ~(SSUSB_U2_PORT_PDN | SSUSB_U2_PORT_DIS);
 		value |= SSUSB_U2_PORT_HOST_SEL;
@@ -168,13 +170,12 @@ int ssusb_host_enable(struct ssusb_mtk *ssusb)
 	return ssusb_check_clocks(ssusb, check_clk);
 }
 
-int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend)
+static int ssusb_host_disable(struct ssusb_mtk *ssusb)
 {
 	void __iomem *ibase = ssusb->ippc_base;
 	int num_u3p = ssusb->u3_ports;
 	int num_u2p = ssusb->u2_ports;
 	u32 value;
-	int ret;
 	int i;
 
 	/* power down and disable u3 ports except skipped ones */
@@ -183,32 +184,101 @@ int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend)
 			continue;
 
 		value = mtu3_readl(ibase, SSUSB_U3_CTRL(i));
-		value |= SSUSB_U3_PORT_PDN;
-		value |= suspend ? 0 : SSUSB_U3_PORT_DIS;
+		value |= SSUSB_U3_PORT_PDN | SSUSB_U3_PORT_DIS;
 		mtu3_writel(ibase, SSUSB_U3_CTRL(i), value);
 	}
 
-	/* power down and disable all u2 ports */
+	/* power down and disable u2 ports except skipped ones */
 	for (i = 0; i < num_u2p; i++) {
+		if ((0x1 << i) & ssusb->u2p_dis_msk)
+			continue;
+
 		value = mtu3_readl(ibase, SSUSB_U2_CTRL(i));
-		value |= SSUSB_U2_PORT_PDN;
-		value |= suspend ? 0 : SSUSB_U2_PORT_DIS;
+		value |= SSUSB_U2_PORT_PDN | SSUSB_U2_PORT_DIS;
 		mtu3_writel(ibase, SSUSB_U2_CTRL(i), value);
 	}
 
 	/* power down host ip */
 	mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL1, SSUSB_IP_HOST_PDN);
 
-	if (!suspend)
-		return 0;
+	return 0;
+}
 
-	/* wait for host ip to sleep */
-	ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS1, value,
-			  (value & SSUSB_IP_SLEEP_STS), 100, 100000);
-	if (ret)
-		dev_err(ssusb->dev, "ip sleep failed!!!\n");
+int ssusb_host_resume(struct ssusb_mtk *ssusb, bool p0_skipped)
+{
+	void __iomem *ibase = ssusb->ippc_base;
+	int u3p_skip_msk = ssusb->u3p_dis_msk;
+	int u2p_skip_msk = ssusb->u2p_dis_msk;
+	int num_u3p = ssusb->u3_ports;
+	int num_u2p = ssusb->u2_ports;
+	u32 value;
+	int i;
 
-	return ret;
+	if (p0_skipped) {
+		u2p_skip_msk |= 0x1;
+		if (ssusb->otg_switch.is_u3_drd)
+			u3p_skip_msk |= 0x1;
+	}
+
+	/* power on host ip */
+	mtu3_clrbits(ibase, U3D_SSUSB_IP_PW_CTRL1, SSUSB_IP_HOST_PDN);
+
+	/* power on u3 ports except skipped ones */
+	for (i = 0; i < num_u3p; i++) {
+		if ((0x1 << i) & u3p_skip_msk)
+			continue;
+
+		value = mtu3_readl(ibase, SSUSB_U3_CTRL(i));
+		value &= ~SSUSB_U3_PORT_PDN;
+		mtu3_writel(ibase, SSUSB_U3_CTRL(i), value);
+	}
+
+	/* power on all u2 ports except skipped ones */
+	for (i = 0; i < num_u2p; i++) {
+		if ((0x1 << i) & u2p_skip_msk)
+			continue;
+
+		value = mtu3_readl(ibase, SSUSB_U2_CTRL(i));
+		value &= ~SSUSB_U2_PORT_PDN;
+		mtu3_writel(ibase, SSUSB_U2_CTRL(i), value);
+	}
+
+	return 0;
+}
+
+/* here not skip port0 due to PDN can be set repeatedly */
+int ssusb_host_suspend(struct ssusb_mtk *ssusb)
+{
+	void __iomem *ibase = ssusb->ippc_base;
+	int num_u3p = ssusb->u3_ports;
+	int num_u2p = ssusb->u2_ports;
+	u32 value;
+	int i;
+
+	/* power down u3 ports except skipped ones */
+	for (i = 0; i < num_u3p; i++) {
+		if ((0x1 << i) & ssusb->u3p_dis_msk)
+			continue;
+
+		value = mtu3_readl(ibase, SSUSB_U3_CTRL(i));
+		value |= SSUSB_U3_PORT_PDN;
+		mtu3_writel(ibase, SSUSB_U3_CTRL(i), value);
+	}
+
+	/* power down u2 ports except skipped ones */
+	for (i = 0; i < num_u2p; i++) {
+		if ((0x1 << i) & ssusb->u2p_dis_msk)
+			continue;
+
+		value = mtu3_readl(ibase, SSUSB_U2_CTRL(i));
+		value |= SSUSB_U2_PORT_PDN;
+		mtu3_writel(ibase, SSUSB_U2_CTRL(i), value);
+	}
+
+	/* power down host ip */
+	mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL1, SSUSB_IP_HOST_PDN);
+
+	return 0;
 }
 
 static void ssusb_host_setup(struct ssusb_mtk *ssusb)
@@ -231,7 +301,7 @@ static void ssusb_host_cleanup(struct ssusb_mtk *ssusb)
 	if (ssusb->is_host)
 		ssusb_set_vbus(&ssusb->otg_switch, 0);
 
-	ssusb_host_disable(ssusb, false);
+	ssusb_host_disable(ssusb);
 }
 
 /*
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c
index c0615f6e5cce..f13531022f4a 100644
--- a/drivers/usb/mtu3/mtu3_plat.c
+++ b/drivers/usb/mtu3/mtu3_plat.c
@@ -12,6 +12,7 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/platform_device.h>
+#include <linux/pm_wakeirq.h>
 
 #include "mtu3.h"
 #include "mtu3_dr.h"
@@ -44,6 +45,32 @@ int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks)
 	return 0;
 }
 
+static int wait_for_ip_sleep(struct ssusb_mtk *ssusb)
+{
+	bool sleep_check = true;
+	u32 value;
+	int ret;
+
+	if (!ssusb->is_host)
+		sleep_check = ssusb_gadget_ip_sleep_check(ssusb);
+
+	if (!sleep_check)
+		return 0;
+
+	/* wait for ip enter sleep mode */
+	ret = readl_poll_timeout(ssusb->ippc_base + U3D_SSUSB_IP_PW_STS1, value,
+				 (value & SSUSB_IP_SLEEP_STS), 100, 100000);
+	if (ret) {
+		dev_err(ssusb->dev, "ip sleep failed!!!\n");
+		ret = -EBUSY;
+	} else {
+		/* workaround: avoid wrong wakeup signal latch for some soc */
+		usleep_range(100, 200);
+	}
+
+	return ret;
+}
+
 static int ssusb_phy_init(struct ssusb_mtk *ssusb)
 {
 	int i;
@@ -208,6 +235,10 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 	if (IS_ERR(ssusb->ippc_base))
 		return PTR_ERR(ssusb->ippc_base);
 
+	ssusb->wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup");
+	if (ssusb->wakeup_irq == -EPROBE_DEFER)
+		return ssusb->wakeup_irq;
+
 	ssusb->dr_mode = usb_get_dr_mode(dev);
 	if (ssusb->dr_mode == USB_DR_MODE_UNKNOWN)
 		ssusb->dr_mode = USB_DR_MODE_OTG;
@@ -225,6 +256,8 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 	/* optional property, ignore the error if it does not exist */
 	of_property_read_u32(node, "mediatek,u3p-dis-msk",
 			     &ssusb->u3p_dis_msk);
+	of_property_read_u32(node, "mediatek,u2p-dis-msk",
+			     &ssusb->u2p_dis_msk);
 
 	otg_sx->vbus = devm_regulator_get(dev, "vbus");
 	if (IS_ERR(otg_sx->vbus)) {
@@ -241,6 +274,9 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 		of_property_read_bool(node, "enable-manual-drd");
 	otg_sx->role_sw_used = of_property_read_bool(node, "usb-role-switch");
 
+	/* can't disable port0 when use dual-role mode */
+	ssusb->u2p_dis_msk &= ~0x1;
+
 	if (otg_sx->role_sw_used || otg_sx->manual_drd_enabled)
 		goto out;
 
@@ -253,9 +289,11 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 	}
 
 out:
-	dev_info(dev, "dr_mode: %d, is_u3_dr: %d, u3p_dis_msk: %x, drd: %s\n",
-		ssusb->dr_mode, otg_sx->is_u3_drd, ssusb->u3p_dis_msk,
+	dev_info(dev, "dr_mode: %d, is_u3_dr: %d, drd: %s\n",
+		 ssusb->dr_mode, otg_sx->is_u3_drd,
 		otg_sx->manual_drd_enabled ? "manual" : "auto");
+	dev_info(dev, "u2p_dis_msk: %x, u3p_dis_msk: %x\n",
+		 ssusb->u2p_dis_msk, ssusb->u3p_dis_msk);
 
 	return 0;
 }
@@ -288,14 +326,25 @@ static int mtu3_probe(struct platform_device *pdev)
 	ssusb_debugfs_create_root(ssusb);
 
 	/* enable power domain */
+	pm_runtime_set_active(dev);
+	pm_runtime_use_autosuspend(dev);
+	pm_runtime_set_autosuspend_delay(dev, 4000);
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
-	device_enable_async_suspend(dev);
 
 	ret = ssusb_rscs_init(ssusb);
 	if (ret)
 		goto comm_init_err;
 
+	if (ssusb->wakeup_irq > 0) {
+		ret = dev_pm_set_dedicated_wake_irq(dev, ssusb->wakeup_irq);
+		if (ret) {
+			dev_err(dev, "failed to set wakeup irq %d\n", ssusb->wakeup_irq);
+			goto comm_exit;
+		}
+		dev_info(dev, "wakeup irq %d\n", ssusb->wakeup_irq);
+	}
+
 	ssusb_ip_sw_reset(ssusb);
 
 	if (IS_ENABLED(CONFIG_USB_MTU3_HOST))
@@ -346,6 +395,11 @@ static int mtu3_probe(struct platform_device *pdev)
 		goto comm_exit;
 	}
 
+	device_enable_async_suspend(dev);
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+	pm_runtime_forbid(dev);
+
 	return 0;
 
 host_exit:
@@ -355,7 +409,7 @@ gadget_exit:
 comm_exit:
 	ssusb_rscs_exit(ssusb);
 comm_init_err:
-	pm_runtime_put_sync(dev);
+	pm_runtime_put_noidle(dev);
 	pm_runtime_disable(dev);
 	ssusb_debugfs_remove_root(ssusb);
 
@@ -366,6 +420,8 @@ static int mtu3_remove(struct platform_device *pdev)
 {
 	struct ssusb_mtk *ssusb = platform_get_drvdata(pdev);
 
+	pm_runtime_get_sync(&pdev->dev);
+
 	switch (ssusb->dr_mode) {
 	case USB_DR_MODE_PERIPHERAL:
 		ssusb_gadget_exit(ssusb);
@@ -383,45 +439,87 @@ static int mtu3_remove(struct platform_device *pdev)
 	}
 
 	ssusb_rscs_exit(ssusb);
-	pm_runtime_put_sync(&pdev->dev);
-	pm_runtime_disable(&pdev->dev);
 	ssusb_debugfs_remove_root(ssusb);
+	pm_runtime_disable(&pdev->dev);
+	pm_runtime_put_noidle(&pdev->dev);
+	pm_runtime_set_suspended(&pdev->dev);
 
 	return 0;
 }
 
-/*
- * when support dual-role mode, we reject suspend when
- * it works as device mode;
- */
-static int __maybe_unused mtu3_suspend(struct device *dev)
+static int resume_ip_and_ports(struct ssusb_mtk *ssusb, pm_message_t msg)
+{
+	switch (ssusb->dr_mode) {
+	case USB_DR_MODE_PERIPHERAL:
+		ssusb_gadget_resume(ssusb, msg);
+		break;
+	case USB_DR_MODE_HOST:
+		ssusb_host_resume(ssusb, false);
+		break;
+	case USB_DR_MODE_OTG:
+		ssusb_host_resume(ssusb, !ssusb->is_host);
+		if (!ssusb->is_host)
+			ssusb_gadget_resume(ssusb, msg);
+
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int mtu3_suspend_common(struct device *dev, pm_message_t msg)
 {
 	struct ssusb_mtk *ssusb = dev_get_drvdata(dev);
+	int ret = 0;
 
 	dev_dbg(dev, "%s\n", __func__);
 
-	/* REVISIT: disconnect it for only device mode? */
-	if (!ssusb->is_host)
-		return 0;
+	switch (ssusb->dr_mode) {
+	case USB_DR_MODE_PERIPHERAL:
+		ret = ssusb_gadget_suspend(ssusb, msg);
+		if (ret)
+			goto err;
+
+		break;
+	case USB_DR_MODE_HOST:
+		ssusb_host_suspend(ssusb);
+		break;
+	case USB_DR_MODE_OTG:
+		if (!ssusb->is_host) {
+			ret = ssusb_gadget_suspend(ssusb, msg);
+			if (ret)
+				goto err;
+		}
+		ssusb_host_suspend(ssusb);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ret = wait_for_ip_sleep(ssusb);
+	if (ret)
+		goto sleep_err;
 
-	ssusb_host_disable(ssusb, true);
 	ssusb_phy_power_off(ssusb);
 	clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
 	ssusb_wakeup_set(ssusb, true);
-
 	return 0;
+
+sleep_err:
+	resume_ip_and_ports(ssusb, msg);
+err:
+	return ret;
 }
 
-static int __maybe_unused mtu3_resume(struct device *dev)
+static int mtu3_resume_common(struct device *dev, pm_message_t msg)
 {
 	struct ssusb_mtk *ssusb = dev_get_drvdata(dev);
 	int ret;
 
 	dev_dbg(dev, "%s\n", __func__);
 
-	if (!ssusb->is_host)
-		return 0;
-
 	ssusb_wakeup_set(ssusb, false);
 	ret = clk_bulk_prepare_enable(BULK_CLKS_CNT, ssusb->clks);
 	if (ret)
@@ -431,9 +529,7 @@ static int __maybe_unused mtu3_resume(struct device *dev)
 	if (ret)
 		goto phy_err;
 
-	ssusb_host_enable(ssusb);
-
-	return 0;
+	return resume_ip_and_ports(ssusb, msg);
 
 phy_err:
 	clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
@@ -441,8 +537,36 @@ clks_err:
 	return ret;
 }
 
+static int __maybe_unused mtu3_suspend(struct device *dev)
+{
+	return mtu3_suspend_common(dev, PMSG_SUSPEND);
+}
+
+static int __maybe_unused mtu3_resume(struct device *dev)
+{
+	return mtu3_resume_common(dev, PMSG_SUSPEND);
+}
+
+static int __maybe_unused mtu3_runtime_suspend(struct device *dev)
+{
+	if (!device_may_wakeup(dev))
+		return 0;
+
+	return mtu3_suspend_common(dev, PMSG_AUTO_SUSPEND);
+}
+
+static int __maybe_unused mtu3_runtime_resume(struct device *dev)
+{
+	if (!device_may_wakeup(dev))
+		return 0;
+
+	return mtu3_resume_common(dev, PMSG_AUTO_SUSPEND);
+}
+
 static const struct dev_pm_ops mtu3_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(mtu3_suspend, mtu3_resume)
+	SET_RUNTIME_PM_OPS(mtu3_runtime_suspend,
+			   mtu3_runtime_resume, NULL)
 };
 
 #define DEV_PM_OPS (IS_ENABLED(CONFIG_PM) ? &mtu3_pm_ops : NULL)
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 5892f3ce0cdc..ce9fc46c9266 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -890,23 +890,22 @@ static int dsps_probe(struct platform_device *pdev)
 	if (!glue->usbss_base)
 		return -ENXIO;
 
-	if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) {
-		ret = dsps_setup_optional_vbus_irq(pdev, glue);
-		if (ret)
-			goto err_iounmap;
-	}
-
 	platform_set_drvdata(pdev, glue);
 	pm_runtime_enable(&pdev->dev);
 	ret = dsps_create_musb_pdev(glue, pdev);
 	if (ret)
 		goto err;
 
+	if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) {
+		ret = dsps_setup_optional_vbus_irq(pdev, glue);
+		if (ret)
+			goto err;
+	}
+
 	return 0;
 
 err:
 	pm_runtime_disable(&pdev->dev);
-err_iounmap:
 	iounmap(glue->usbss_base);
 	return ret;
 }
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 640a46f0d118..f086960fe2b5 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -35,6 +35,7 @@ struct omap2430_glue {
 	struct device		*control_otghs;
 	unsigned int		is_runtime_suspended:1;
 	unsigned int		needs_resume:1;
+	unsigned int		phy_suspended:1;
 };
 #define glue_to_musb(g)		platform_get_drvdata(g->musb)
 
@@ -458,8 +459,10 @@ static int omap2430_runtime_suspend(struct device *dev)
 
 	omap2430_low_level_exit(musb);
 
-	phy_power_off(musb->phy);
-	phy_exit(musb->phy);
+	if (!glue->phy_suspended) {
+		phy_power_off(musb->phy);
+		phy_exit(musb->phy);
+	}
 
 	glue->is_runtime_suspended = 1;
 
@@ -474,8 +477,10 @@ static int omap2430_runtime_resume(struct device *dev)
 	if (!musb)
 		return 0;
 
-	phy_init(musb->phy);
-	phy_power_on(musb->phy);
+	if (!glue->phy_suspended) {
+		phy_init(musb->phy);
+		phy_power_on(musb->phy);
+	}
 
 	omap2430_low_level_init(musb);
 	musb_writel(musb->mregs, OTG_INTERFSEL,
@@ -489,9 +494,23 @@ static int omap2430_runtime_resume(struct device *dev)
 	return 0;
 }
 
+/* I2C and SPI PHYs need to be suspended before the glue layer */
 static int omap2430_suspend(struct device *dev)
 {
 	struct omap2430_glue *glue = dev_get_drvdata(dev);
+	struct musb *musb = glue_to_musb(glue);
+
+	phy_power_off(musb->phy);
+	phy_exit(musb->phy);
+	glue->phy_suspended = 1;
+
+	return 0;
+}
+
+/* Glue layer needs to be suspended after musb_suspend() */
+static int omap2430_suspend_late(struct device *dev)
+{
+	struct omap2430_glue *glue = dev_get_drvdata(dev);
 
 	if (glue->is_runtime_suspended)
 		return 0;
@@ -501,7 +520,7 @@ static int omap2430_suspend(struct device *dev)
 	return omap2430_runtime_suspend(dev);
 }
 
-static int omap2430_resume(struct device *dev)
+static int omap2430_resume_early(struct device *dev)
 {
 	struct omap2430_glue *glue = dev_get_drvdata(dev);
 
@@ -513,10 +532,24 @@ static int omap2430_resume(struct device *dev)
 	return omap2430_runtime_resume(dev);
 }
 
+static int omap2430_resume(struct device *dev)
+{
+	struct omap2430_glue *glue = dev_get_drvdata(dev);
+	struct musb *musb = glue_to_musb(glue);
+
+	phy_init(musb->phy);
+	phy_power_on(musb->phy);
+	glue->phy_suspended = 0;
+
+	return 0;
+}
+
 static const struct dev_pm_ops omap2430_pm_ops = {
 	.runtime_suspend = omap2430_runtime_suspend,
 	.runtime_resume = omap2430_runtime_resume,
 	.suspend = omap2430_suspend,
+	.suspend_late = omap2430_suspend_late,
+	.resume_early = omap2430_resume_early,
 	.resume = omap2430_resume,
 };
 
diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
index f34c9437a182..972704262b02 100644
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -873,6 +873,8 @@ int usb_otg_start(struct platform_device *pdev)
 
 	/* request irq */
 	p_otg->irq = platform_get_irq(pdev, 0);
+	if (p_otg->irq < 0)
+		return p_otg->irq;
 	status = request_irq(p_otg->irq, fsl_otg_isr,
 				IRQF_SHARED, driver_name, p_otg);
 	if (status) {
diff --git a/drivers/usb/phy/phy-isp1301-omap.c b/drivers/usb/phy/phy-isp1301-omap.c
index f3e9b3b6ac3e..190699b38b41 100644
--- a/drivers/usb/phy/phy-isp1301-omap.c
+++ b/drivers/usb/phy/phy-isp1301-omap.c
@@ -12,7 +12,7 @@
 #include <linux/slab.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 #include <linux/usb.h>
diff --git a/drivers/usb/phy/phy-tahvo.c b/drivers/usb/phy/phy-tahvo.c
index baebb1f5a973..a3e043e3e4aa 100644
--- a/drivers/usb/phy/phy-tahvo.c
+++ b/drivers/usb/phy/phy-tahvo.c
@@ -393,7 +393,9 @@ static int tahvo_usb_probe(struct platform_device *pdev)
 
 	dev_set_drvdata(&pdev->dev, tu);
 
-	tu->irq = platform_get_irq(pdev, 0);
+	tu->irq = ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		return ret;
 	ret = request_threaded_irq(tu->irq, NULL, tahvo_usb_vbus_interrupt,
 				   IRQF_ONESHOT,
 				   "tahvo-vbus", tu);
diff --git a/drivers/usb/phy/phy-twl6030-usb.c b/drivers/usb/phy/phy-twl6030-usb.c
index 8ba6c5a91557..ab3c38a7d8ac 100644
--- a/drivers/usb/phy/phy-twl6030-usb.c
+++ b/drivers/usb/phy/phy-twl6030-usb.c
@@ -348,6 +348,11 @@ static int twl6030_usb_probe(struct platform_device *pdev)
 	twl->irq2		= platform_get_irq(pdev, 1);
 	twl->linkstat		= MUSB_UNKNOWN;
 
+	if (twl->irq1 < 0)
+		return twl->irq1;
+	if (twl->irq2 < 0)
+		return twl->irq2;
+
 	twl->comparator.set_vbus	= twl6030_set_vbus;
 	twl->comparator.start_srp	= twl6030_start_srp;
 
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index a3c2b01ccf7b..10607e273879 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -366,7 +366,7 @@ static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done)
 
 	ret = usbhsf_fifo_select(pipe, fifo, 1);
 	if (ret < 0) {
-		dev_err(dev, "%s() faile\n", __func__);
+		dev_err(dev, "%s() failed\n", __func__);
 		return ret;
 	}
 
diff --git a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c
index 7133818a58b9..9e38142acd38 100644
--- a/drivers/usb/serial/bus.c
+++ b/drivers/usb/serial/bus.c
@@ -74,7 +74,7 @@ err_autopm_put:
 	return retval;
 }
 
-static int usb_serial_device_remove(struct device *dev)
+static void usb_serial_device_remove(struct device *dev)
 {
 	struct usb_serial_port *port = to_usb_serial_port(dev);
 	struct usb_serial_driver *driver;
@@ -101,8 +101,6 @@ static int usb_serial_device_remove(struct device *dev)
 
 	if (!autopm_err)
 		usb_autopm_put_interface(port->serial->interface);
-
-	return 0;
 }
 
 static ssize_t new_id_store(struct device_driver *driver,
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index 3c80bfbf3bec..66a6ac50a4cd 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -400,6 +400,7 @@ struct cp210x_special_chars {
 };
 
 /* CP210X_VENDOR_SPECIFIC values */
+#define CP210X_GET_FW_VER	0x000E
 #define CP210X_READ_2NCONFIG	0x000E
 #define CP210X_GET_FW_VER_2N	0x0010
 #define CP210X_READ_LATCH	0x00C2
@@ -638,7 +639,7 @@ static int cp210x_read_reg_block(struct usb_serial_port *port, u8 req,
 	result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 			req, REQTYPE_INTERFACE_TO_HOST, 0,
 			port_priv->bInterfaceNumber, dmabuf, bufsize,
-			USB_CTRL_SET_TIMEOUT);
+			USB_CTRL_GET_TIMEOUT);
 	if (result == bufsize) {
 		memcpy(buf, dmabuf, bufsize);
 		result = 0;
@@ -1145,33 +1146,6 @@ static void cp210x_disable_event_mode(struct usb_serial_port *port)
 	port_priv->event_mode = false;
 }
 
-static int cp210x_set_chars(struct usb_serial_port *port,
-		struct cp210x_special_chars *chars)
-{
-	struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
-	struct usb_serial *serial = port->serial;
-	void *dmabuf;
-	int result;
-
-	dmabuf = kmemdup(chars, sizeof(*chars), GFP_KERNEL);
-	if (!dmabuf)
-		return -ENOMEM;
-
-	result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
-				CP210X_SET_CHARS, REQTYPE_HOST_TO_INTERFACE, 0,
-				port_priv->bInterfaceNumber,
-				dmabuf, sizeof(*chars), USB_CTRL_SET_TIMEOUT);
-
-	kfree(dmabuf);
-
-	if (result < 0) {
-		dev_err(&port->dev, "failed to set special chars: %d\n", result);
-		return result;
-	}
-
-	return 0;
-}
-
 static bool cp210x_termios_change(const struct ktermios *a, const struct ktermios *b)
 {
 	bool iflag_change, cc_change;
@@ -1192,6 +1166,7 @@ static void cp210x_set_flow_control(struct tty_struct *tty,
 	struct cp210x_flow_ctl flow_ctl;
 	u32 flow_repl;
 	u32 ctl_hs;
+	bool crtscts;
 	int ret;
 
 	/*
@@ -1218,9 +1193,12 @@ static void cp210x_set_flow_control(struct tty_struct *tty,
 		chars.bXonChar = START_CHAR(tty);
 		chars.bXoffChar = STOP_CHAR(tty);
 
-		ret = cp210x_set_chars(port, &chars);
-		if (ret)
-			return;
+		ret = cp210x_write_reg_block(port, CP210X_SET_CHARS, &chars,
+				sizeof(chars));
+		if (ret) {
+			dev_err(&port->dev, "failed to set special chars: %d\n",
+					ret);
+		}
 	}
 
 	mutex_lock(&port_priv->mutex);
@@ -1249,14 +1227,14 @@ static void cp210x_set_flow_control(struct tty_struct *tty,
 			flow_repl |= CP210X_SERIAL_RTS_FLOW_CTL;
 		else
 			flow_repl |= CP210X_SERIAL_RTS_INACTIVE;
-		port_priv->crtscts = true;
+		crtscts = true;
 	} else {
 		ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE;
 		if (port_priv->rts)
 			flow_repl |= CP210X_SERIAL_RTS_ACTIVE;
 		else
 			flow_repl |= CP210X_SERIAL_RTS_INACTIVE;
-		port_priv->crtscts = false;
+		crtscts = false;
 	}
 
 	if (I_IXOFF(tty)) {
@@ -1279,8 +1257,12 @@ static void cp210x_set_flow_control(struct tty_struct *tty,
 	flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs);
 	flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl);
 
-	cp210x_write_reg_block(port, CP210X_SET_FLOW, &flow_ctl,
+	ret = cp210x_write_reg_block(port, CP210X_SET_FLOW, &flow_ctl,
 			sizeof(flow_ctl));
+	if (ret)
+		goto out_unlock;
+
+	port_priv->crtscts = crtscts;
 out_unlock:
 	mutex_unlock(&port_priv->mutex);
 }
@@ -2111,12 +2093,26 @@ static int cp210x_get_fw_version(struct usb_serial *serial, u16 value)
 	return 0;
 }
 
-static void cp210x_determine_quirks(struct usb_serial *serial)
+static void cp210x_determine_type(struct usb_serial *serial)
 {
 	struct cp210x_serial_private *priv = usb_get_serial_data(serial);
 	int ret;
 
+	ret = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
+			CP210X_GET_PARTNUM, &priv->partnum,
+			sizeof(priv->partnum));
+	if (ret < 0) {
+		dev_warn(&serial->interface->dev,
+				"querying part number failed\n");
+		priv->partnum = CP210X_PARTNUM_UNKNOWN;
+		return;
+	}
+
 	switch (priv->partnum) {
+	case CP210X_PARTNUM_CP2105:
+	case CP210X_PARTNUM_CP2108:
+		cp210x_get_fw_version(serial, CP210X_GET_FW_VER);
+		break;
 	case CP210X_PARTNUM_CP2102N_QFN28:
 	case CP210X_PARTNUM_CP2102N_QFN24:
 	case CP210X_PARTNUM_CP2102N_QFN20:
@@ -2140,18 +2136,9 @@ static int cp210x_attach(struct usb_serial *serial)
 	if (!priv)
 		return -ENOMEM;
 
-	result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
-					  CP210X_GET_PARTNUM, &priv->partnum,
-					  sizeof(priv->partnum));
-	if (result < 0) {
-		dev_warn(&serial->interface->dev,
-			 "querying part number failed\n");
-		priv->partnum = CP210X_PARTNUM_UNKNOWN;
-	}
-
 	usb_set_serial_data(serial, priv);
 
-	cp210x_determine_quirks(serial);
+	cp210x_determine_type(serial);
 	cp210x_init_max_speed(serial);
 
 	result = cp210x_gpio_init(serial);
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index 6b18990258c3..6924fa95f6bd 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -1199,9 +1199,9 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 
-module_param(stats, bool, S_IRUGO | S_IWUSR);
+module_param(stats, bool, 0644);
 MODULE_PARM_DESC(stats, "Enable statistics or not");
-module_param(interval, int, S_IRUGO | S_IWUSR);
+module_param(interval, int, 0644);
 MODULE_PARM_DESC(interval, "Overrides interrupt interval");
-module_param(unstable_bauds, bool, S_IRUGO | S_IWUSR);
+module_param(unstable_bauds, bool, 0644);
 MODULE_PARM_DESC(unstable_bauds, "Allow unstable baud rates");
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 4a1f3a95d017..99d19828dae6 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -219,6 +219,7 @@ static const struct usb_device_id id_table_combined[] = {
 	{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_R2000KU_TRUE_RNG) },
 	{ USB_DEVICE(FTDI_VID, FTDI_VARDAAN_PID) },
+	{ USB_DEVICE(FTDI_VID, FTDI_AUTO_M3_OP_COM_V2_PID) },
 	{ USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0100_PID) },
 	{ USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0101_PID) },
 	{ USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0102_PID) },
@@ -2937,5 +2938,5 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 
-module_param(ndi_latency_timer, int, S_IRUGO | S_IWUSR);
+module_param(ndi_latency_timer, int, 0644);
 MODULE_PARM_DESC(ndi_latency_timer, "NDI device latency timer override");
diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
index add602bebd82..755858ca20ba 100644
--- a/drivers/usb/serial/ftdi_sio_ids.h
+++ b/drivers/usb/serial/ftdi_sio_ids.h
@@ -159,6 +159,9 @@
 /* Vardaan Enterprises Serial Interface VEUSB422R3 */
 #define FTDI_VARDAAN_PID	0xF070
 
+/* Auto-M3 Ltd. - OP-COM USB V2 - OBD interface Adapter */
+#define FTDI_AUTO_M3_OP_COM_V2_PID	0x4f50
+
 /*
  * Xsens Technologies BV products (http://www.xsens.com).
  */
diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
index 756d1ac7e96f..e5c75944ebb7 100644
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -1444,5 +1444,5 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 
-module_param(initial_mode, int, S_IRUGO);
+module_param(initial_mode, int, 0444);
 MODULE_PARM_DESC(initial_mode, "Initial mode");
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index ea4edf5eed27..bdee78cc4a07 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -389,39 +389,6 @@ static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 	release_firmware(fw);
 }
 
-#if 0
-/************************************************************************
- *
- *  Get string descriptor from device
- *
- ************************************************************************/
-static int get_string_desc(struct usb_device *dev, int Id,
-				struct usb_string_descriptor **pRetDesc)
-{
-	struct usb_string_descriptor StringDesc;
-	struct usb_string_descriptor *pStringDesc;
-
-	dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
-
-	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
-						sizeof(StringDesc)))
-		return 0;
-
-	pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
-	if (!pStringDesc)
-		return -1;
-
-	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
-							StringDesc.bLength)) {
-		kfree(pStringDesc);
-		return -1;
-	}
-
-	*pRetDesc = pStringDesc;
-	return 0;
-}
-#endif
-
 static void dump_product_info(struct edgeport_serial *edge_serial,
 			      struct edgeport_product_info *product_info)
 {
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index 84b848d2794e..a7b3c15957ba 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -2746,9 +2746,9 @@ MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 MODULE_FIRMWARE("edgeport/down3.bin");
 
-module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
+module_param(ignore_cpu_rev, bool, 0644);
 MODULE_PARM_DESC(ignore_cpu_rev,
 			"Ignore the cpu revision when connecting to a device");
 
-module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
+module_param(default_uart_mode, int, 0644);
 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
diff --git a/drivers/usb/serial/ipaq.c b/drivers/usb/serial/ipaq.c
index f81746c3c26c..e11441bac44f 100644
--- a/drivers/usb/serial/ipaq.c
+++ b/drivers/usb/serial/ipaq.c
@@ -599,10 +599,10 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 
-module_param(connect_retries, int, S_IRUGO|S_IWUSR);
+module_param(connect_retries, int, 0644);
 MODULE_PARM_DESC(connect_retries,
 		"Maximum number of connect retries (one second each)");
 
-module_param(initial_wait, int, S_IRUGO|S_IWUSR);
+module_param(initial_wait, int, 0644);
 MODULE_PARM_DESC(initial_wait,
 		"Time to wait before attempting a connection (in seconds)");
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index 19753611e7b0..0be3b5e1eaf3 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -1188,20 +1188,20 @@ MODULE_AUTHOR("Alain Degreffe eczema@ecze.com");
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 
-module_param(xmas, bool, S_IRUGO | S_IWUSR);
+module_param(xmas, bool, 0644);
 MODULE_PARM_DESC(xmas, "Xmas colors enabled or not");
 
-module_param(boost, int, S_IRUGO | S_IWUSR);
+module_param(boost, int, 0644);
 MODULE_PARM_DESC(boost, "Card overclock boost (in percent 100-500)");
 
-module_param(clockmode, int, S_IRUGO | S_IWUSR);
+module_param(clockmode, int, 0644);
 MODULE_PARM_DESC(clockmode, "Card clock mode (1=3.579 MHz, 2=3.680 MHz, "
 		"3=6 Mhz)");
 
-module_param(cdmode, int, S_IRUGO | S_IWUSR);
+module_param(cdmode, int, 0644);
 MODULE_PARM_DESC(cdmode, "Card detect mode (0=none, 1=CD, 2=!CD, 3=DSR, "
 		 "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING)");
 
-module_param(vcc_default, int, S_IRUGO | S_IWUSR);
+module_param(vcc_default, int, 0644);
 MODULE_PARM_DESC(vcc_default, "Set default VCC (either 3 for 3.3V or 5 "
 		"for 5V). Default to 5.");
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 0fbe253dc570..29c765cc8495 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -1203,6 +1203,8 @@ static const struct usb_device_id option_ids[] = {
 	  .driver_info = NCTRL(2) | RSVD(3) },
 	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1055, 0xff),	/* Telit FN980 (PCIe) */
 	  .driver_info = NCTRL(0) | RSVD(1) },
+	{ USB_DEVICE_INTERFACE_CLASS(TELIT_VENDOR_ID, 0x1056, 0xff),	/* Telit FD980 */
+	  .driver_info = NCTRL(2) | RSVD(3) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_ME910),
 	  .driver_info = NCTRL(0) | RSVD(1) | RSVD(3) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_ME910_DUAL_MODEM),
@@ -2072,6 +2074,8 @@ static const struct usb_device_id option_ids[] = {
 	  .driver_info = RSVD(4) | RSVD(5) },
 	{ USB_DEVICE_INTERFACE_CLASS(0x2cb7, 0x0105, 0xff),			/* Fibocom NL678 series */
 	  .driver_info = RSVD(6) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(0x2cb7, 0x010b, 0xff, 0xff, 0x30) },	/* Fibocom FG150 Diag */
+	{ USB_DEVICE_AND_INTERFACE_INFO(0x2cb7, 0x010b, 0xff, 0, 0) },		/* Fibocom FG150 AT */
 	{ USB_DEVICE_INTERFACE_CLASS(0x2cb7, 0x01a0, 0xff) },			/* Fibocom NL668-AM/NL652-EU (laptop MBIM) */
 	{ USB_DEVICE_INTERFACE_CLASS(0x2df3, 0x9d03, 0xff) },			/* LongSung M5710 */
 	{ USB_DEVICE_INTERFACE_CLASS(0x305a, 0x1404, 0xff) },			/* GosunCn GM500 RNDIS */
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 2f2f5047452b..f45ca7ddf78e 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -418,24 +418,35 @@ static int pl2303_detect_type(struct usb_serial *serial)
 	bcdDevice = le16_to_cpu(desc->bcdDevice);
 	bcdUSB = le16_to_cpu(desc->bcdUSB);
 
-	switch (bcdDevice) {
-	case 0x100:
-		/*
-		 * Assume it's an HXN-type if the device doesn't support the old read
-		 * request value.
-		 */
-		if (bcdUSB == 0x200 && !pl2303_supports_hx_status(serial))
-			return TYPE_HXN;
+	switch (bcdUSB) {
+	case 0x110:
+		switch (bcdDevice) {
+		case 0x300:
+			return TYPE_HX;
+		case 0x400:
+			return TYPE_HXD;
+		default:
+			return TYPE_HX;
+		}
 		break;
-	case 0x300:
-		if (bcdUSB == 0x200)
+	case 0x200:
+		switch (bcdDevice) {
+		case 0x100:
+		case 0x305:
+		case 0x405:
+			/*
+			 * Assume it's an HXN-type if the device doesn't
+			 * support the old read request value.
+			 */
+			if (!pl2303_supports_hx_status(serial))
+				return TYPE_HXN;
+			break;
+		case 0x300:
 			return TYPE_TA;
-
-		return TYPE_HX;
-	case 0x400:
-		return TYPE_HXD;
-	case 0x500:
-		return TYPE_TB;
+		case 0x500:
+			return TYPE_TB;
+		}
+		break;
 	}
 
 	dev_err(&serial->interface->dev,
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 4b49b7c33364..9d56138133a9 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -1056,5 +1056,5 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL v2");
 
-module_param(nmea, bool, S_IRUGO | S_IWUSR);
+module_param(nmea, bool, 0644);
 MODULE_PARM_DESC(nmea, "NMEA streaming");
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index eeb441c77207..090a78c948f2 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1319,9 +1319,10 @@ static int __init usb_serial_init(void)
 {
 	int result;
 
-	usb_serial_tty_driver = alloc_tty_driver(USB_SERIAL_TTY_MINORS);
-	if (!usb_serial_tty_driver)
-		return -ENOMEM;
+	usb_serial_tty_driver = tty_alloc_driver(USB_SERIAL_TTY_MINORS,
+			TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV);
+	if (IS_ERR(usb_serial_tty_driver))
+		return PTR_ERR(usb_serial_tty_driver);
 
 	/* Initialize our global data */
 	result = bus_register(&usb_serial_bus_type);
@@ -1336,8 +1337,6 @@ static int __init usb_serial_init(void)
 	usb_serial_tty_driver->minor_start = 0;
 	usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
 	usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL;
-	usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW |
-						TTY_DRIVER_DYNAMIC_DEV;
 	usb_serial_tty_driver->init_termios = tty_std_termios;
 	usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD
 							| HUPCL | CLOCAL;
@@ -1367,7 +1366,7 @@ exit_reg_driver:
 
 exit_bus:
 	pr_err("%s - returning with error %d\n", __func__, result);
-	put_tty_driver(usb_serial_tty_driver);
+	tty_driver_kref_put(usb_serial_tty_driver);
 	return result;
 }
 
@@ -1379,7 +1378,7 @@ static void __exit usb_serial_exit(void)
 	usb_serial_generic_deregister();
 
 	tty_unregister_driver(usb_serial_tty_driver);
-	put_tty_driver(usb_serial_tty_driver);
+	tty_driver_kref_put(usb_serial_tty_driver);
 	bus_unregister(&usb_serial_bus_type);
 	idr_destroy(&serial_minors);
 }
diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c
index f4304ce69350..4c5a0a49035f 100644
--- a/drivers/usb/storage/transport.c
+++ b/drivers/usb/storage/transport.c
@@ -551,7 +551,7 @@ static void last_sector_hacks(struct us_data *us, struct scsi_cmnd *srb)
 	/* Did this command access the last sector? */
 	sector = (srb->cmnd[2] << 24) | (srb->cmnd[3] << 16) |
 			(srb->cmnd[4] << 8) | (srb->cmnd[5]);
-	disk = srb->request->rq_disk;
+	disk = scsi_cmd_to_rq(srb)->rq_disk;
 	if (!disk)
 		goto done;
 	sdkp = scsi_disk(disk);
diff --git a/drivers/usb/typec/bus.c b/drivers/usb/typec/bus.c
index 7f3c9a8e2bf0..78e0e78954f2 100644
--- a/drivers/usb/typec/bus.c
+++ b/drivers/usb/typec/bus.c
@@ -382,7 +382,7 @@ static int typec_probe(struct device *dev)
 	return ret;
 }
 
-static int typec_remove(struct device *dev)
+static void typec_remove(struct device *dev)
 {
 	struct typec_altmode_driver *drv = to_altmode_driver(dev->driver);
 	struct typec_altmode *adev = to_typec_altmode(dev);
@@ -400,8 +400,6 @@ static int typec_remove(struct device *dev)
 
 	adev->desc = NULL;
 	adev->ops = NULL;
-
-	return 0;
 }
 
 struct bus_type typec_bus = {
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 5b22a1c931a9..a4d37205df54 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -278,7 +278,7 @@ struct pd_mode_data {
  * @req_max_curr: Requested max current of the port partner
  * @req_out_volt: Requested output voltage to the port partner
  * @req_op_curr: Requested operating current to the port partner
- * @supported: Parter has atleast one APDO hence supports PPS
+ * @supported: Parter has at least one APDO hence supports PPS
  * @active: PPS mode is active
  */
 struct pd_pps_data {
@@ -316,6 +316,7 @@ struct tcpm_port {
 	struct typec_partner *partner;
 
 	enum typec_cc_status cc_req;
+	enum typec_cc_status src_rp;	/* work only if pd_supported == false */
 
 	enum typec_cc_status cc1;
 	enum typec_cc_status cc2;
@@ -323,6 +324,7 @@ struct tcpm_port {
 
 	bool attached;
 	bool connected;
+	bool pd_supported;
 	enum typec_port_type port_type;
 
 	/*
@@ -341,6 +343,7 @@ struct tcpm_port {
 	bool vbus_source;
 	bool vbus_charge;
 
+	/* Set to true when Discover_Identity Command is expected to be sent in Ready states. */
 	bool send_discover;
 	bool op_vsafe5v;
 
@@ -370,6 +373,7 @@ struct tcpm_port {
 	struct hrtimer send_discover_timer;
 	struct kthread_work send_discover_work;
 	bool state_machine_running;
+	/* Set to true when VDM State Machine has following actions. */
 	bool vdm_sm_running;
 
 	struct completion tx_complete;
@@ -815,6 +819,9 @@ static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port)
 	int nr_pdo = port->nr_src_pdo;
 	int i;
 
+	if (!port->pd_supported)
+		return port->src_rp;
+
 	/*
 	 * Search for first entry with matching voltage.
 	 * It should report the maximum supported current.
@@ -1431,6 +1438,7 @@ static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
 	/* Set ready, vdm state machine will actually send */
 	port->vdm_retries = 0;
 	port->vdm_state = VDM_STATE_READY;
+	port->vdm_sm_running = true;
 
 	mod_vdm_delayed_work(port, 0);
 }
@@ -1673,7 +1681,6 @@ static int tcpm_pd_svdm(struct tcpm_port *port, struct typec_altmode *adev,
 				rlen = 1;
 			} else {
 				tcpm_register_partner_altmodes(port);
-				port->vdm_sm_running = false;
 			}
 			break;
 		case CMD_ENTER_MODE:
@@ -1721,14 +1728,12 @@ static int tcpm_pd_svdm(struct tcpm_port *port, struct typec_altmode *adev,
 				      (VDO_SVDM_VERS(svdm_version));
 			break;
 		}
-		port->vdm_sm_running = false;
 		break;
 	default:
 		response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
 		rlen = 1;
 		response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) |
 			      (VDO_SVDM_VERS(svdm_version));
-		port->vdm_sm_running = false;
 		break;
 	}
 
@@ -1737,6 +1742,10 @@ static int tcpm_pd_svdm(struct tcpm_port *port, struct typec_altmode *adev,
 	return rlen;
 }
 
+static void tcpm_pd_handle_msg(struct tcpm_port *port,
+			       enum pd_msg_request message,
+			       enum tcpm_ams ams);
+
 static void tcpm_handle_vdm_request(struct tcpm_port *port,
 				    const __le32 *payload, int cnt)
 {
@@ -1764,11 +1773,25 @@ static void tcpm_handle_vdm_request(struct tcpm_port *port,
 		port->vdm_state = VDM_STATE_DONE;
 	}
 
-	if (PD_VDO_SVDM(p[0])) {
+	if (PD_VDO_SVDM(p[0]) && (adev || tcpm_vdm_ams(port) || port->nr_snk_vdo)) {
+		/*
+		 * Here a SVDM is received (INIT or RSP or unknown). Set the vdm_sm_running in
+		 * advance because we are dropping the lock but may send VDMs soon.
+		 * For the cases of INIT received:
+		 *  - If no response to send, it will be cleared later in this function.
+		 *  - If there are responses to send, it will be cleared in the state machine.
+		 * For the cases of RSP received:
+		 *  - If no further INIT to send, it will be cleared later in this function.
+		 *  - Otherwise, it will be cleared in the state machine if timeout or it will go
+		 *    back here until no further INIT to send.
+		 * For the cases of unknown type received:
+		 *  - We will send NAK and the flag will be cleared in the state machine.
+		 */
+		port->vdm_sm_running = true;
 		rlen = tcpm_pd_svdm(port, adev, p, cnt, response, &adev_action);
 	} else {
 		if (port->negotiated_rev >= PD_REV30)
-			tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
+			tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
 	}
 
 	/*
@@ -1833,6 +1856,8 @@ static void tcpm_handle_vdm_request(struct tcpm_port *port,
 
 	if (rlen > 0)
 		tcpm_queue_vdm(port, response[0], &response[1], rlen - 1);
+	else
+		port->vdm_sm_running = false;
 }
 
 static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd,
@@ -1898,8 +1923,10 @@ static void vdm_run_state_machine(struct tcpm_port *port)
 		 * if there's traffic or we're not in PDO ready state don't send
 		 * a VDM.
 		 */
-		if (port->state != SRC_READY && port->state != SNK_READY)
+		if (port->state != SRC_READY && port->state != SNK_READY) {
+			port->vdm_sm_running = false;
 			break;
+		}
 
 		/* TODO: AMS operation for Unstructured VDM */
 		if (PD_VDO_SVDM(vdo_hdr) && PD_VDO_CMDT(vdo_hdr) == CMDT_INIT) {
@@ -2041,7 +2068,7 @@ enum pdo_err {
 
 static const char * const pdo_err_msg[] = {
 	[PDO_ERR_NO_VSAFE5V] =
-	" err: source/sink caps should atleast have vSafe5V",
+	" err: source/sink caps should at least have vSafe5V",
 	[PDO_ERR_VSAFE5V_NOT_FIRST] =
 	" err: vSafe5V Fixed Supply Object Shall always be the first object",
 	[PDO_ERR_PDO_TYPE_NOT_IN_ORDER] =
@@ -2471,10 +2498,7 @@ static void tcpm_pd_data_request(struct tcpm_port *port,
 					   NONE_AMS);
 		break;
 	case PD_DATA_VENDOR_DEF:
-		if (tcpm_vdm_ams(port) || port->nr_snk_vdo)
-			tcpm_handle_vdm_request(port, msg->payload, cnt);
-		else if (port->negotiated_rev > PD_REV20)
-			tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
+		tcpm_handle_vdm_request(port, msg->payload, cnt);
 		break;
 	case PD_DATA_BIST:
 		port->bist_request = le32_to_cpu(msg->payload[0]);
@@ -2555,10 +2579,6 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port,
 								       TYPEC_PWR_MODE_PD,
 								       port->pps_data.active,
 								       port->supply_voltage);
-				/* Set VDM running flag ASAP */
-				if (port->data_role == TYPEC_HOST &&
-				    port->send_discover)
-					port->vdm_sm_running = true;
 				tcpm_set_state(port, SNK_READY, 0);
 			} else {
 				/*
@@ -2596,14 +2616,10 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port,
 		switch (port->state) {
 		case SNK_NEGOTIATE_CAPABILITIES:
 			/* USB PD specification, Figure 8-43 */
-			if (port->explicit_contract) {
+			if (port->explicit_contract)
 				next_state = SNK_READY;
-				if (port->data_role == TYPEC_HOST &&
-				    port->send_discover)
-					port->vdm_sm_running = true;
-			} else {
+			else
 				next_state = SNK_WAIT_CAPABILITIES;
-			}
 
 			/* Threshold was relaxed before sending Request. Restore it back. */
 			tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD,
@@ -2618,10 +2634,6 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port,
 			port->pps_status = (type == PD_CTRL_WAIT ?
 					    -EAGAIN : -EOPNOTSUPP);
 
-			if (port->data_role == TYPEC_HOST &&
-			    port->send_discover)
-				port->vdm_sm_running = true;
-
 			/* Threshold was relaxed before sending Request. Restore it back. */
 			tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD,
 							       port->pps_data.active,
@@ -2697,10 +2709,6 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port,
 			}
 			break;
 		case DR_SWAP_SEND:
-			if (port->data_role == TYPEC_DEVICE &&
-			    port->send_discover)
-				port->vdm_sm_running = true;
-
 			tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0);
 			break;
 		case PR_SWAP_SEND:
@@ -2738,7 +2746,7 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port,
 					   PD_MSG_CTRL_NOT_SUPP,
 					   NONE_AMS);
 		} else {
-			if (port->vdm_sm_running) {
+			if (port->send_discover) {
 				tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
 				break;
 			}
@@ -2754,7 +2762,7 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port,
 					   PD_MSG_CTRL_NOT_SUPP,
 					   NONE_AMS);
 		} else {
-			if (port->vdm_sm_running) {
+			if (port->send_discover) {
 				tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
 				break;
 			}
@@ -2763,7 +2771,7 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port,
 		}
 		break;
 	case PD_CTRL_VCONN_SWAP:
-		if (port->vdm_sm_running) {
+		if (port->send_discover) {
 			tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
 			break;
 		}
@@ -3568,9 +3576,11 @@ static int tcpm_src_attach(struct tcpm_port *port)
 	if (ret < 0)
 		return ret;
 
-	ret = port->tcpc->set_pd_rx(port->tcpc, true);
-	if (ret < 0)
-		goto out_disable_mux;
+	if (port->pd_supported) {
+		ret = port->tcpc->set_pd_rx(port->tcpc, true);
+		if (ret < 0)
+			goto out_disable_mux;
+	}
 
 	/*
 	 * USB Type-C specification, version 1.2,
@@ -3600,7 +3610,8 @@ static int tcpm_src_attach(struct tcpm_port *port)
 out_disable_vconn:
 	tcpm_set_vconn(port, false);
 out_disable_pd:
-	port->tcpc->set_pd_rx(port->tcpc, false);
+	if (port->pd_supported)
+		port->tcpc->set_pd_rx(port->tcpc, false);
 out_disable_mux:
 	tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
 		     TYPEC_ORIENTATION_NONE);
@@ -3804,6 +3815,20 @@ static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc)
 	}
 }
 
+static enum typec_cc_status tcpm_pwr_opmode_to_rp(enum typec_pwr_opmode opmode)
+{
+	switch (opmode) {
+	case TYPEC_PWR_MODE_USB:
+		return TYPEC_CC_RP_DEF;
+	case TYPEC_PWR_MODE_1_5A:
+		return TYPEC_CC_RP_1_5;
+	case TYPEC_PWR_MODE_3_0A:
+	case TYPEC_PWR_MODE_PD:
+	default:
+		return TYPEC_CC_RP_3_0;
+	}
+}
+
 static void run_state_machine(struct tcpm_port *port)
 {
 	int ret;
@@ -3914,6 +3939,10 @@ static void run_state_machine(struct tcpm_port *port)
 		if (port->ams == POWER_ROLE_SWAP ||
 		    port->ams == FAST_ROLE_SWAP)
 			tcpm_ams_finish(port);
+		if (!port->pd_supported) {
+			tcpm_set_state(port, SRC_READY, 0);
+			break;
+		}
 		port->upcoming_state = SRC_SEND_CAPABILITIES;
 		tcpm_ams_start(port, POWER_NEGOTIATION);
 		break;
@@ -4161,7 +4190,10 @@ static void run_state_machine(struct tcpm_port *port)
 				current_lim = PD_P_SNK_STDBY_MW / 5;
 			tcpm_set_current_limit(port, current_lim, 5000);
 			tcpm_set_charge(port, true);
-			tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
+			if (!port->pd_supported)
+				tcpm_set_state(port, SNK_READY, 0);
+			else
+				tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
 			break;
 		}
 		/*
@@ -4389,7 +4421,8 @@ static void run_state_machine(struct tcpm_port *port)
 		tcpm_set_vbus(port, true);
 		if (port->ams == HARD_RESET)
 			tcpm_ams_finish(port);
-		port->tcpc->set_pd_rx(port->tcpc, true);
+		if (port->pd_supported)
+			port->tcpc->set_pd_rx(port->tcpc, true);
 		tcpm_set_attached_state(port, true);
 		tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
 		break;
@@ -4479,18 +4512,20 @@ static void run_state_machine(struct tcpm_port *port)
 	/* DR_Swap states */
 	case DR_SWAP_SEND:
 		tcpm_pd_send_control(port, PD_CTRL_DR_SWAP);
+		if (port->data_role == TYPEC_DEVICE || port->negotiated_rev > PD_REV20)
+			port->send_discover = true;
 		tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT,
 				    PD_T_SENDER_RESPONSE);
 		break;
 	case DR_SWAP_ACCEPT:
 		tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
-		/* Set VDM state machine running flag ASAP */
-		if (port->data_role == TYPEC_DEVICE && port->send_discover)
-			port->vdm_sm_running = true;
+		if (port->data_role == TYPEC_DEVICE || port->negotiated_rev > PD_REV20)
+			port->send_discover = true;
 		tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0);
 		break;
 	case DR_SWAP_SEND_TIMEOUT:
 		tcpm_swap_complete(port, -ETIMEDOUT);
+		port->send_discover = false;
 		tcpm_ams_finish(port);
 		tcpm_set_state(port, ready_state(port), 0);
 		break;
@@ -4502,7 +4537,6 @@ static void run_state_machine(struct tcpm_port *port)
 		} else {
 			tcpm_set_roles(port, true, port->pwr_role,
 				       TYPEC_HOST);
-			port->send_discover = true;
 		}
 		tcpm_ams_finish(port);
 		tcpm_set_state(port, ready_state(port), 0);
@@ -4645,8 +4679,6 @@ static void run_state_machine(struct tcpm_port *port)
 		break;
 	case VCONN_SWAP_SEND_TIMEOUT:
 		tcpm_swap_complete(port, -ETIMEDOUT);
-		if (port->data_role == TYPEC_HOST && port->send_discover)
-			port->vdm_sm_running = true;
 		tcpm_set_state(port, ready_state(port), 0);
 		break;
 	case VCONN_SWAP_START:
@@ -4662,14 +4694,10 @@ static void run_state_machine(struct tcpm_port *port)
 	case VCONN_SWAP_TURN_ON_VCONN:
 		tcpm_set_vconn(port, true);
 		tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
-		if (port->data_role == TYPEC_HOST && port->send_discover)
-			port->vdm_sm_running = true;
 		tcpm_set_state(port, ready_state(port), 0);
 		break;
 	case VCONN_SWAP_TURN_OFF_VCONN:
 		tcpm_set_vconn(port, false);
-		if (port->data_role == TYPEC_HOST && port->send_discover)
-			port->vdm_sm_running = true;
 		tcpm_set_state(port, ready_state(port), 0);
 		break;
 
@@ -4677,8 +4705,6 @@ static void run_state_machine(struct tcpm_port *port)
 	case PR_SWAP_CANCEL:
 	case VCONN_SWAP_CANCEL:
 		tcpm_swap_complete(port, port->swap_status);
-		if (port->data_role == TYPEC_HOST && port->send_discover)
-			port->vdm_sm_running = true;
 		if (port->pwr_role == TYPEC_SOURCE)
 			tcpm_set_state(port, SRC_READY, 0);
 		else
@@ -5028,9 +5054,6 @@ static void _tcpm_pd_vbus_on(struct tcpm_port *port)
 	switch (port->state) {
 	case SNK_TRANSITION_SINK_VBUS:
 		port->explicit_contract = true;
-		/* Set the VDM flag ASAP */
-		if (port->data_role == TYPEC_HOST && port->send_discover)
-			port->vdm_sm_running = true;
 		tcpm_set_state(port, SNK_READY, 0);
 		break;
 	case SNK_DISCOVERY:
@@ -5369,7 +5392,7 @@ EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
 void tcpm_sink_frs(struct tcpm_port *port)
 {
 	spin_lock(&port->pd_event_lock);
-	port->pd_events = TCPM_FRS_EVENT;
+	port->pd_events |= TCPM_FRS_EVENT;
 	spin_unlock(&port->pd_event_lock);
 	kthread_queue_work(port->wq, &port->event_work);
 }
@@ -5378,7 +5401,7 @@ EXPORT_SYMBOL_GPL(tcpm_sink_frs);
 void tcpm_sourcing_vbus(struct tcpm_port *port)
 {
 	spin_lock(&port->pd_event_lock);
-	port->pd_events = TCPM_SOURCING_VBUS;
+	port->pd_events |= TCPM_SOURCING_VBUS;
 	spin_unlock(&port->pd_event_lock);
 	kthread_queue_work(port->wq, &port->event_work);
 }
@@ -5425,15 +5448,18 @@ static void tcpm_send_discover_work(struct kthread_work *work)
 	if (!port->send_discover)
 		goto unlock;
 
+	if (port->data_role == TYPEC_DEVICE && port->negotiated_rev < PD_REV30) {
+		port->send_discover = false;
+		goto unlock;
+	}
+
 	/* Retry if the port is not idle */
 	if ((port->state != SRC_READY && port->state != SNK_READY) || port->vdm_sm_running) {
 		mod_send_discover_delayed_work(port, SEND_DISCOVER_RETRY_MS);
 		goto unlock;
 	}
 
-	/* Only send the Message if the port is host for PD rev2.0 */
-	if (port->data_role == TYPEC_HOST || port->negotiated_rev > PD_REV20)
-		tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
+	tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
 
 unlock:
 	mutex_unlock(&port->lock);
@@ -5898,6 +5924,7 @@ EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
 static int tcpm_fw_get_caps(struct tcpm_port *port,
 			    struct fwnode_handle *fwnode)
 {
+	const char *opmode_str;
 	const char *cap_str;
 	int ret;
 	u32 mw, frs_current;
@@ -5932,22 +5959,37 @@ static int tcpm_fw_get_caps(struct tcpm_port *port,
 		return ret;
 	port->typec_caps.type = ret;
 	port->port_type = port->typec_caps.type;
+	port->pd_supported = !fwnode_property_read_bool(fwnode, "pd-disable");
 
 	port->slow_charger_loop = fwnode_property_read_bool(fwnode, "slow-charger-loop");
 	if (port->port_type == TYPEC_PORT_SNK)
 		goto sink;
 
-	/* Get source pdos */
-	ret = fwnode_property_count_u32(fwnode, "source-pdos");
-	if (ret <= 0)
-		return -EINVAL;
+	/* Get Source PDOs for the PD port or Source Rp value for the non-PD port */
+	if (port->pd_supported) {
+		ret = fwnode_property_count_u32(fwnode, "source-pdos");
+		if (ret == 0)
+			return -EINVAL;
+		else if (ret < 0)
+			return ret;
 
-	port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
-	ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
-					     port->src_pdo, port->nr_src_pdo);
-	if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo,
-					    port->nr_src_pdo))
-		return -EINVAL;
+		port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
+		ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
+						     port->src_pdo, port->nr_src_pdo);
+		if (ret)
+			return ret;
+		ret = tcpm_validate_caps(port, port->src_pdo, port->nr_src_pdo);
+		if (ret)
+			return ret;
+	} else {
+		ret = fwnode_property_read_string(fwnode, "typec-power-opmode", &opmode_str);
+		if (ret)
+			return ret;
+		ret = typec_find_pwr_opmode(opmode_str);
+		if (ret < 0)
+			return ret;
+		port->src_rp = tcpm_pwr_opmode_to_rp(ret);
+	}
 
 	if (port->port_type == TYPEC_PORT_SRC)
 		return 0;
@@ -5961,6 +6003,11 @@ static int tcpm_fw_get_caps(struct tcpm_port *port,
 	if (port->typec_caps.prefer_role < 0)
 		return -EINVAL;
 sink:
+	port->self_powered = fwnode_property_read_bool(fwnode, "self-powered");
+
+	if (!port->pd_supported)
+		return 0;
+
 	/* Get sink pdos */
 	ret = fwnode_property_count_u32(fwnode, "sink-pdos");
 	if (ret <= 0)
@@ -5977,9 +6024,7 @@ sink:
 		return -EINVAL;
 	port->operating_snk_mw = mw / 1000;
 
-	port->self_powered = fwnode_property_read_bool(fwnode, "self-powered");
-
-	/* FRS can only be supported byb DRP ports */
+	/* FRS can only be supported by DRP ports */
 	if (port->port_type == TYPEC_PORT_DRP) {
 		ret = fwnode_property_read_u32(fwnode, "new-source-frs-typec-current",
 					       &frs_current);
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index 4ba6bcdaa8e9..233265550fc6 100644
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -455,8 +455,14 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			vhci_hcd->port_status[rhport] &= ~(1 << USB_PORT_FEAT_RESET);
 			vhci_hcd->re_timeout = 0;
 
+			/*
+			 * A few drivers do usb reset during probe when
+			 * the device could be in VDEV_ST_USED state
+			 */
 			if (vhci_hcd->vdev[rhport].ud.status ==
-			    VDEV_ST_NOTASSIGNED) {
+				VDEV_ST_NOTASSIGNED ||
+			    vhci_hcd->vdev[rhport].ud.status ==
+				VDEV_ST_USED) {
 				usbip_dbg_vhci_rh(
 					" enable rhport %d (status %u)\n",
 					rhport,
@@ -945,7 +951,8 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 	return 0;
 }
 
-static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
+static void vhci_cleanup_unlink_list(struct vhci_device *vdev,
+		struct list_head *unlink_list)
 {
 	struct vhci_hcd *vhci_hcd = vdev_to_vhci_hcd(vdev);
 	struct usb_hcd *hcd = vhci_hcd_to_hcd(vhci_hcd);
@@ -956,25 +963,11 @@ static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
 	spin_lock_irqsave(&vhci->lock, flags);
 	spin_lock(&vdev->priv_lock);
 
-	list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
-		pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum);
-		list_del(&unlink->list);
-		kfree(unlink);
-	}
-
-	while (!list_empty(&vdev->unlink_rx)) {
+	list_for_each_entry_safe(unlink, tmp, unlink_list, list) {
 		struct urb *urb;
 
-		unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink,
-			list);
-
-		/* give back URB of unanswered unlink request */
-		pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum);
-
 		urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum);
 		if (!urb) {
-			pr_info("the urb (seqnum %lu) was already given back\n",
-				unlink->unlink_seqnum);
 			list_del(&unlink->list);
 			kfree(unlink);
 			continue;
@@ -1001,6 +994,15 @@ static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
 	spin_unlock_irqrestore(&vhci->lock, flags);
 }
 
+static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
+{
+	/* give back URB of unsent unlink request */
+	vhci_cleanup_unlink_list(vdev, &vdev->unlink_tx);
+
+	/* give back URB of unanswered unlink request */
+	vhci_cleanup_unlink_list(vdev, &vdev->unlink_rx);
+}
+
 /*
  * The important thing is that only one context begins cleanup.
  * This is why error handling and cleanup become simple.