[media] gspca - sonixj: Fix a zero divide in isoc interrupt

In case of short marker, the number of received packets was not
incremented doing a zero divide when computing the filling rate.

Reported-by: Hans Petter Selasky <hans.petter.selasky@bitfrost.no>
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c
index db8e5084df06..863c755dd2b7 100644
--- a/drivers/media/video/gspca/sonixj.c
+++ b/drivers/media/video/gspca/sonixj.c
@@ -2923,6 +2923,10 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
          * not the JPEG end of frame ('ff d9').
          */
 
+        /* count the packets and their size */
+        sd->npkt++;
+        sd->pktsz += len;
+
 /*fixme: assumption about the following code:
  *      - there can be only one marker in a packet
  */
@@ -2945,10 +2949,6 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
                 data += i;
         }
 
-        /* count the packets and their size */
-        sd->npkt++;
-        sd->pktsz += len;
-
         /* search backwards if there is a marker in the packet */
         for (i = len - 1; --i >= 0; ) {
                 if (data[i] != 0xff) {