6.11-stable review patch. If anyone has any objections, please let me know.
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From: Michael Grzeschik m.grzeschik@pengutronix.de
[ Upstream commit adc292d54de9db2e6b8ecb7f81f278bbbaf713e9 ]
Since the req_free list will updated if enqueuing one request was not possible it will be added back to the free list. With every available free request in the queue it is a valid case for the pump worker to use it and continue the pending bufferdata into requests for the req_ready list.
Fixes: 6acba0345b68 ("usb:gadget:uvc Do not use worker thread to pump isoc usb requests") Signed-off-by: Michael Grzeschik m.grzeschik@pengutronix.de Link: https://lore.kernel.org/r/20240403-uvc_request_length_by_interval-v7-1-e224b... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/gadget/function/uvc_video.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index a9edd60fbbf77..48fd8d3c50b0c 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -480,6 +480,10 @@ uvc_video_complete(struct usb_ep *ep, struct usb_request *req) * up later. */ list_add_tail(&to_queue->list, &video->req_free); + /* + * There is a new free request - wake up the pump. + */ + queue_work(video->async_wq, &video->pump); }
spin_unlock_irqrestore(&video->req_lock, flags);