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From: Wim Van Sebroeck on 7 Jun 2010 12:00
Hi Linus,

Please pull from 'master' branch of
git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog.git
or if master.kernel.org hasn't synced up yet:
master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog.git

This will update the following files:

drivers/watchdog/wm8350_wdt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

with these Changes:

Author: Julia Lawall <julia(a)diku.dk>
Date: Thu May 27 14:32:24 2010 +0200

[PATCH 2/11] drivers/watchdog: Eliminate a NULL pointer dereference

At the point of the call to dev_err, wm8350 is NULL.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression E,E1;
identifier f;
statement S1,S2,S3;
@@

if ((E == NULL && ...) || ...)
{
... when != if (...) S1 else S2
when != E = E1
* E->f
... when any
return ...;
}
else S3
// </smpl>

Signed-off-by: Julia Lawall <julia(a)diku.dk>
Acked-by: Mark Brown <broonie(a)opensource.wolfsonmicro.com>
Signed-off-by: Wim Van Sebroeck <wim(a)iguana.be>

The Changes can also be looked at on:
http://www.kernel.org/git/?p=linux/kernel/git/wim/linux-2.6-watchdog.git;a=summary

For completeness, I added the overal diff below.

Greetings,
Wim.

================================================================================
diff --git a/drivers/watchdog/wm8350_wdt.c b/drivers/watchdog/wm8350_wdt.c
index 89dd7b0..b68d928 100644
--- a/drivers/watchdog/wm8350_wdt.c
+++ b/drivers/watchdog/wm8350_wdt.c
@@ -284,7 +284,7 @@ static int __devinit wm8350_wdt_probe(struct platform_device *pdev)
struct wm8350 *wm8350 = platform_get_drvdata(pdev);

if (!wm8350) {
- dev_err(wm8350->dev, "No driver data supplied\n");
+ pr_err("No driver data supplied\n");
return -ENODEV;
}

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Next: [PATCH] [RFC] Save/restore MISC_ENABLE register