V4L/DVB: video/zc0301: improve error handling

Return an error if the controller is not found.

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

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/media/video/zc0301/zc0301_core.c b/drivers/media/video/zc0301/zc0301_core.c
index e44e4b5f3e5..bb51cfb0c64 100644
--- a/drivers/media/video/zc0301/zc0301_core.c
+++ b/drivers/media/video/zc0301/zc0301_core.c
@@ -1153,7 +1153,7 @@ zc0301_vidioc_s_ctrl(struct zc0301_device* cam, void __user * arg)
         if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
                 return -EFAULT;
 
-        for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
+        for (i = 0; i < ARRAY_SIZE(s->qctrl); i++) {
                 if (ctrl.id == s->qctrl[i].id) {
                         if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
                                 return -EINVAL;
@@ -1163,7 +1163,9 @@ zc0301_vidioc_s_ctrl(struct zc0301_device* cam, void __user * arg)
                         ctrl.value -= ctrl.value % s->qctrl[i].step;
                         break;
                 }
-
+        }
+        if (i == ARRAY_SIZE(s->qctrl))
+                return -EINVAL;
         if ((err = s->set_ctrl(cam, &ctrl)))
                 return err;