V4L/DVB (9545): gspca: Add a flag for empty ISOC packets.
- This flag is needed by some subdrivers as tv8532 for start
of frame detection.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index afddb18..8a528c9 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -150,8 +150,11 @@
/* check the packet status and length */
len = urb->iso_frame_desc[i].actual_length;
- if (len == 0)
+ if (len == 0) {
+ if (gspca_dev->empty_packet == 0)
+ gspca_dev->empty_packet = 1;
continue;
+ }
st = urb->iso_frame_desc[i].status;
if (st) {
PDEBUG(D_ERR,
@@ -1858,6 +1861,7 @@
gspca_dev->nbalt = intf->num_altsetting;
gspca_dev->sd_desc = sd_desc;
gspca_dev->nbufread = 2;
+ gspca_dev->empty_packet = -1; /* don't check the empty packets */
/* configure the subdriver and initialize the USB device */
ret = gspca_dev->sd_desc->config(gspca_dev, id);