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path: root/drivers/usb/gadget/imx_udc.c
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Diffstat (limited to 'drivers/usb/gadget/imx_udc.c')
-rw-r--r--drivers/usb/gadget/imx_udc.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index 168658b4b4e2..c52a681f376c 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -415,6 +415,13 @@ static int write_packet(struct imx_ep_struct *imx_ep, struct imx_request *req)
u8 *buf;
int length, count, temp;
+ if (unlikely(__raw_readl(imx_ep->imx_usb->base +
+ USB_EP_STAT(EP_NO(imx_ep))) & EPSTAT_ZLPS)) {
+ D_TRX(imx_ep->imx_usb->dev, "<%s> zlp still queued in EP %s\n",
+ __func__, imx_ep->ep.name);
+ return -1;
+ }
+
buf = req->req.buf + req->req.actual;
prefetch(buf);
@@ -734,9 +741,12 @@ static struct usb_request *imx_ep_alloc_request
{
struct imx_request *req;
+ if (!usb_ep)
+ return NULL;
+
req = kzalloc(sizeof *req, gfp_flags);
- if (!req || !usb_ep)
- return 0;
+ if (!req)
+ return NULL;
INIT_LIST_HEAD(&req->queue);
req->in_use = 0;