linux-kernel - [PATCH] VIDEO: ivtvfb, remove unneeded NULL test

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Message-Id: <1277206910-27228-1-git-send-email-jslaby@suse.cz>
Date:	Tue, 22 Jun 2010 13:41:50 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	mchehab@...radead.org
Cc:	linux-kernel@...r.kernel.org, jirislaby@...il.com,
	Jiri Slaby <jslaby@...e.cz>,
	Andy Walls <awalls@...metrocast.net>,
	Tejun Heo <tj@...nel.org>,
	Ian Armstrong <ian@...mst.demon.co.uk>,
	ivtv-devel@...vdriver.org, linux-media@...r.kernel.org
Subject: [PATCH] VIDEO: ivtvfb, remove unneeded NULL test

Stanse found that in ivtvfb_callback_cleanup there is an unneeded test
for itv being NULL. But itv is initialized as container_of with
non-zero offset, so it is never NULL (even if v4l2_dev is). This was
found because itv is dereferenced earlier than the test.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Andy Walls <awalls@...metrocast.net>
Cc: Mauro Carvalho Chehab <mchehab@...radead.org>
Cc: Tejun Heo <tj@...nel.org>
Cc: Ian Armstrong <ian@...mst.demon.co.uk>
Cc: ivtv-devel@...vdriver.org
Cc: linux-media@...r.kernel.org
---
 drivers/media/video/ivtv/ivtvfb.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/media/video/ivtv/ivtvfb.c b/drivers/media/video/ivtv/ivtvfb.c
index 9ff3425..5dc460e 100644
--- a/drivers/media/video/ivtv/ivtvfb.c
+++ b/drivers/media/video/ivtv/ivtvfb.c
@@ -1219,7 +1219,7 @@ static int ivtvfb_callback_cleanup(struct device *dev, void *p)
 	struct ivtv *itv = container_of(v4l2_dev, struct ivtv, v4l2_dev);
 	struct osd_info *oi = itv->osd_info;
 
-	if (itv && (itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT)) {
+	if (itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT) {
 		if (unregister_framebuffer(&itv->osd_info->ivtvfb_info)) {
 			IVTVFB_WARN("Framebuffer %d is in use, cannot unload\n",
 				       itv->instance);
-- 
1.7.1


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