[media] gspca - main: Have discontinuous sequence numbers when frames are lost

This patch also sets to 0 the sequence of the first frame.

Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 68b58106e4c8..0fb48c02bf52 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -432,12 +432,13 @@ void gspca_frame_add(struct gspca_dev *gspca_dev,
                 /* if there are no queued buffer, discard the whole frame */
                 if (i == atomic_read(&gspca_dev->fr_q)) {
                         gspca_dev->last_packet_type = DISCARD_PACKET;
+                        gspca_dev->sequence++;
                         return;
                 }
                 j = gspca_dev->fr_queue[i];
                 frame = &gspca_dev->frame[j];
                 frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
-                frame->v4l2_buf.sequence = ++gspca_dev->sequence;
+                frame->v4l2_buf.sequence = gspca_dev->sequence++;
                 gspca_dev->image = frame->data;
                 gspca_dev->image_len = 0;
         } else {