From ab9ffa51d5a2f3145839ca59354b3f74d18f7e85 Mon Sep 17 00:00:00 2001 From: Michael Grzeschik Date: Wed, 14 Feb 2024 00:37:54 +0100 Subject: [PATCH] usb: gadget: uvc: dont drop frames if zero length packages are late If the request that was missed was zero bytes long, it is likely that the overall transferred frame was not affected. So don't flag the frame incomplete in that case. Signed-off-by: Michael Grzeschik Link: https://lore.kernel.org/r/20240214-uvc-error-tag-v1-1-37659a3877fe@pengutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/function/uvc_video.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index ff7c1fa5c48f..d677d7daa187 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -398,7 +398,8 @@ uvc_video_complete(struct usb_ep *ep, struct usb_request *req) case -EXDEV: uvcg_dbg(&video->uvc->func, "VS request missed xfer.\n"); - queue->flags |= UVC_QUEUE_DROP_INCOMPLETE; + if (req->length != 0) + queue->flags |= UVC_QUEUE_DROP_INCOMPLETE; break; case -ESHUTDOWN: /* disconnect from host. */ -- 2.20.1