From: Julia Lawall <julia@diku.dk>
Date: Mon, 28 Dec 2009 14:09:55 +0000 (-0300)
Subject: V4L/DVB (13954): Correct NULL test
X-Git-Tag: v3.0~5946^2~278
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3557aa4f7ddaec2903532595d2caccac32a5bbeb;p=platform%2Fkernel%2Flinux-amlogic.git

V4L/DVB (13954): Correct NULL test

Test the just-allocated value for NULL rather than some other value.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
identifier f;
@@

f(...) { <+... return NULL; ...+> }

@@
expression *x;
expression y;
identifier r.f;
statement S;
@@

x = f(...);
(
if ((x) == NULL) S
|
if (
-   y
+   x
       == NULL)
 S
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/video/usbvision/usbvision-video.c b/drivers/media/video/usbvision/usbvision-video.c
index 1054546..7c17ec6 100644
--- a/drivers/media/video/usbvision/usbvision-video.c
+++ b/drivers/media/video/usbvision/usbvision-video.c
@@ -1487,7 +1487,7 @@ static int __devinit usbvision_register_video(struct usb_usbvision *usbvision)
 		usbvision->vbi = usbvision_vdev_init(usbvision,
 						     &usbvision_vbi_template,
 						     "USBVision VBI");
-		if (usbvision->vdev == NULL) {
+		if (usbvision->vbi == NULL) {
 			goto err_exit;
 		}
 		if (video_register_device(usbvision->vbi,