From: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
If the pending buffers in the queue could not be pushed to the udc
endpoint we have to cancel the uvc_queue. Otherwise the gadget will get
stuck on this error. This patch calls uvc_queue_cancel if usb_ep_queue
failed.
Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
---
drivers/usb/gadget/uvc_video.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/gadget/uvc_video.c b/drivers/usb/gadget/uvc_video.c
index 71e896d..1f66888 100644
--- a/drivers/usb/gadget/uvc_video.c
+++ b/drivers/usb/gadget/uvc_video.c
@@ -194,6 +194,7 @@ uvc_video_complete(struct usb_ep *ep, struct usb_request *req)
if ((ret = usb_ep_queue(ep, req, GFP_ATOMIC)) < 0) {
printk(KERN_INFO "Failed to queue request (%d).\n", ret);
usb_ep_set_halt(ep);
+ uvc_queue_cancel(queue, 0);
spin_unlock_irqrestore(&video->queue.irqlock, flags);
goto requeue;
}
@@ -281,6 +282,7 @@ error:
static int
uvc_video_pump(struct uvc_video *video)
{
+ struct uvc_video_queue *queue = &video->queue;
struct usb_request *req;
struct uvc_buffer *buf;
unsigned long flags;
@@ -321,6 +323,7 @@ uvc_video_pump(struct uvc_video *video)
if (ret < 0) {
printk(KERN_INFO "Failed to queue request (%d)\n", ret);
usb_ep_set_halt(video->ep);
+ uvc_queue_cancel(queue, 0);
spin_unlock_irqrestore(&video->queue.irqlock, flags);
break;
}
--
1.8.2.rc2
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