[PATCH v7 1/9] usb: gadget: uvc: wake pump everytime we update the free list

[Michael Grzeschik <m.grzeschik@pengutronix.de>]

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>

---
v5 -> v7: -
v1 -> v5: - new patch
---
 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 57a851151225d..002bf724d8025 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);

-- 
2.39.5