V4L/DVB (5019): Fix the frame->grabstate update in read() entry point.

The Coverity checker spotted that in usbvision_v4l2_read(), the variable
"frmx" is never assigned any value different from -1, but it's used an 
an array index in "usbvision->frame[frmx]".
Thanks to Adrian Bunk <bunk@stusta.de> for warning about that.

Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/media/video/usbvision/usbvision-video.c b/drivers/media/video/usbvision/usbvision-video.c
index 8c7eba2a728e..7243337b771a 100644
--- a/drivers/media/video/usbvision/usbvision-video.c
+++ b/drivers/media/video/usbvision/usbvision-video.c
@@ -1080,7 +1080,6 @@ static ssize_t usbvision_v4l2_read(struct file *file, char *buf,
         int noblock = file->f_flags & O_NONBLOCK;
         unsigned long lock_flags;
 
-        int frmx = -1;
         int ret,i;
         struct usbvision_frame *frame;
 
@@ -1155,7 +1154,7 @@ static ssize_t usbvision_v4l2_read(struct file *file, char *buf,
                 frame->bytes_read = 0;
 
                 /* Mark it as available to be used again. */
-                usbvision->frame[frmx].grabstate = FrameState_Unused;
+                frame->grabstate = FrameState_Unused;
 /*      } */
 
         return count;