media: gspca: do not resubmit URBs when streaming has stopped

When streaming is stopped all URBs are killed, but in fill_frame and in
bulk_irq this results in an attempt to resubmit the killed URB. That is
not what you want and causes spurious kernel messages.

So check if streaming has stopped before resubmitting.

Also check against gspca_dev->streaming rather than vb2_start_streaming_called()
since vb2_start_streaming_called() will return true when in stop_streaming,
but gspca_dev->streaming is set to false when stop_streaming is called.

Fixes: 6992effe ("gspca: Kill all URBs before releasing any of them")
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/usb/gspca/gspca.c

@@ -314,6 +314,8 @@ static void fill_frame(struct gspca_dev *gspca_dev,
 	}
 
 resubmit:
+	if (!gspca_dev->streaming)
+		return;
 	/* resubmit the URB */
 	st = usb_submit_urb(urb, GFP_ATOMIC);
 	if (st < 0)
@@ -330,7 +332,7 @@ static void isoc_irq(struct urb *urb)
 	struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
 
 	gspca_dbg(gspca_dev, D_PACK, "isoc irq\n");
-	if (!vb2_start_streaming_called(&gspca_dev->queue))
+	if (!gspca_dev->streaming)
 		return;
 	fill_frame(gspca_dev, urb);
 }
@@ -344,7 +346,7 @@ static void bulk_irq(struct urb *urb)
 	int st;
 
 	gspca_dbg(gspca_dev, D_PACK, "bulk irq\n");
-	if (!vb2_start_streaming_called(&gspca_dev->queue))
+	if (!gspca_dev->streaming)
 		return;
 	switch (urb->status) {
 	case 0:
@@ -367,6 +369,8 @@ static void bulk_irq(struct urb *urb)
 				urb->actual_length);
 
 resubmit:
+	if (!gspca_dev->streaming)
+		return;
 	/* resubmit the URB */
 	if (gspca_dev->cam.bulk_nurbs != 0) {
 		st = usb_submit_urb(urb, GFP_ATOMIC);