V4L/DVB: media/az6027: handle -EIO failure

If the az6027_usb_in_op() returns a negative errno ret is -EIO and in
that case the value of b[0] may be undefined.  The original code
assigned 0 to ret, but since it's already 0 now we can skip that.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/media/dvb/dvb-usb/az6027.c b/drivers/media/dvb/dvb-usb/az6027.c
index baaa301c5768..6681ac1c56e3 100644
--- a/drivers/media/dvb/dvb-usb/az6027.c
+++ b/drivers/media/dvb/dvb-usb/az6027.c
@@ -701,10 +701,7 @@ static int az6027_ci_poll_slot_status(struct dvb_ca_en50221 *ca, int slot, int o
         } else
                 ret = 0;
 
-        if (b[0] == 0) {
-                ret = 0;
-
-        } else if (b[0] == 1) {
+        if (!ret && b[0] == 1) {
                 ret = DVB_CA_EN50221_POLL_CAM_PRESENT |
                       DVB_CA_EN50221_POLL_CAM_READY;
         }