V4L/DVB (8491): stkwebcam: Always reuse last queued buffer
This change keeps the video stream going on when the application
is slow queuing buffers, instead of spamming dmesg and hanging.
Fixes a problem with aMSN reported by Samed Beyribey <beyribey@gmail.com>
Signed-off-by: Jaime Velasco Juan <jsagarribay@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/stk-webcam.c b/drivers/media/video/stk-webcam.c
index 8aa56fe..a8a7276 100644
--- a/drivers/media/video/stk-webcam.c
+++ b/drivers/media/video/stk-webcam.c
@@ -445,18 +445,19 @@
fb->v4lbuf.bytesused = 0;
fill = fb->buffer;
} else if (fb->v4lbuf.bytesused == dev->frame_size) {
- list_move_tail(dev->sio_avail.next,
- &dev->sio_full);
- wake_up(&dev->wait_frame);
- if (list_empty(&dev->sio_avail)) {
- (void) (printk_ratelimit() &&
- STK_ERROR("No buffer available\n"));
- goto resubmit;
+ if (list_is_singular(&dev->sio_avail)) {
+ /* Always reuse the last buffer */
+ fb->v4lbuf.bytesused = 0;
+ fill = fb->buffer;
+ } else {
+ list_move_tail(dev->sio_avail.next,
+ &dev->sio_full);
+ wake_up(&dev->wait_frame);
+ fb = list_first_entry(&dev->sio_avail,
+ struct stk_sio_buffer, list);
+ fb->v4lbuf.bytesused = 0;
+ fill = fb->buffer;
}
- fb = list_first_entry(&dev->sio_avail,
- struct stk_sio_buffer, list);
- fb->v4lbuf.bytesused = 0;
- fill = fb->buffer;
}
} else {
framelen -= 4;
