Guard a divide in v4l1 compat layer

Commit Message

Dr. David Alan Gilbert Oct. 24, 2010, 4:33 p.m. UTC

None

Patch

diff --git a/drivers/media/video/v4l1-compat.c b/drivers/media/video/v4l1-compat.c
index 0c2105c..d4ac751 100644
--- a/drivers/media/video/v4l1-compat.c
+++ b/drivers/media/video/v4l1-compat.c
@@ -645,9 +645,16 @@  static noinline long v4l1_compat_get_picture(
 		goto done;
 	}
 
-	pict->depth   = ((fmt->fmt.pix.bytesperline << 3)
-			 + (fmt->fmt.pix.width - 1))
-			 / fmt->fmt.pix.width;
+	if (fmt->fmt.pix.width)
+	{
+		pict->depth   = ((fmt->fmt.pix.bytesperline << 3)
+				 + (fmt->fmt.pix.width - 1))
+				 / fmt->fmt.pix.width;
+	} else {
+		err = -EINVAL;
+		goto done;
+	}
+
 	pict->palette = pixelformat_to_palette(
 		fmt->fmt.pix.pixelformat);
 done: