diff options
| author | Jean-François Moine <moinejf@free.fr> | 2012-03-19 07:22:44 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-03-20 01:27:27 (GMT) |
| commit | 1f42df0db04356ff9384514e1ec027df9ce3d132 (patch) | |
| tree | 2323442e6be0a8f1a65161bb9d94574fc4419a36 /drivers/media | |
| parent | a2816edaaca2586cac66270844614586810f53ea (diff) | |
| download | linux-1f42df0db04356ff9384514e1ec027df9ce3d132.tar.xz | |
[media] gspca - sn9c20x: Fix loss of frame start
The frame header was checked on packets of size 64 bytes only, while the webcams
may put a frame header at the beginning of bigger packets.
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/gspca/sn9c20x.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/media/video/gspca/sn9c20x.c b/drivers/media/video/gspca/sn9c20x.c index 9e198b4..e54bf54 100644 --- a/drivers/media/video/gspca/sn9c20x.c +++ b/drivers/media/video/gspca/sn9c20x.c @@ -2457,7 +2457,7 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, int avg_lum; static u8 frame_header[] = {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96}; - if (len == 64 && memcmp(data, frame_header, 6) == 0) { + if (len >= 64 && memcmp(data, frame_header, 6) == 0) { avg_lum = ((data[35] >> 2) & 3) | (data[20] << 2) | (data[19] << 10); @@ -2485,7 +2485,10 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, avg_lum >>= 9; atomic_set(&sd->avg_lum, avg_lum); gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0); - return; + len -= 64; + if (len == 0) + return; + data += 64; } if (gspca_dev->last_packet_type == LAST_PACKET) { if (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv |