[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>

diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c
index db8e5084df0660fff2e241d06f3073c5317646ab..863c755dd2b7a16866a3e5329b47a9507831bc9d 100644 (file)
--- 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) {