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path: root/drivers/usb/usbip/vhci_hcd.c
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Diffstat (limited to 'drivers/usb/usbip/vhci_hcd.c')
-rw-r--r--drivers/usb/usbip/vhci_hcd.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index 000ab7225717..585a84d319bd 100644
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -697,7 +697,8 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flag
}
vdev = &vhci_hcd->vdev[portnum-1];
- if (!urb->transfer_buffer && urb->transfer_buffer_length) {
+ if (!urb->transfer_buffer && !urb->num_sgs &&
+ urb->transfer_buffer_length) {
dev_dbg(dev, "Null URB transfer buffer\n");
return -EINVAL;
}
@@ -1143,6 +1144,15 @@ static int vhci_setup(struct usb_hcd *hcd)
hcd->speed = HCD_USB3;
hcd->self.root_hub->speed = USB_SPEED_SUPER;
}
+
+ /*
+ * Support SG.
+ * sg_tablesize is an arbitrary value to alleviate memory pressure
+ * on the host.
+ */
+ hcd->self.sg_tablesize = 32;
+ hcd->self.no_sg_constraint = 1;
+
return 0;
}