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authorJohannes Thumshirn <jthumshirn@suse.de>2015-06-02 13:25:26 +0300
committerWim Van Sebroeck <wim@iguana.be>2015-06-22 16:54:32 +0300
commit57337db1b9f96b897d2404531d8b6375667723fa (patch)
tree6e50b771d9b5f13129678fa6bf2b96d3043a3f18 /drivers/watchdog/mena21_wdt.c
parent04b1a62e6bb9b217847be874fe37a6b85ddff67e (diff)
downloadlinux-57337db1b9f96b897d2404531d8b6375667723fa.tar.xz
watchdog: mena21_wdt: Fix possible NULL pointer dereference
In a21_wdt_remove() we do a watchdog_unregister_device() on struct a21_wdt_drv->wdt but never assign it. Also move the dev_set_drvdata() call in front of the watchdog_register_device() call, so it doesn't look like an error. Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/mena21_wdt.c')
-rw-r--r--drivers/watchdog/mena21_wdt.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/watchdog/mena21_wdt.c b/drivers/watchdog/mena21_wdt.c
index 96dbba980579..d193a5e79c38 100644
--- a/drivers/watchdog/mena21_wdt.c
+++ b/drivers/watchdog/mena21_wdt.c
@@ -208,14 +208,15 @@ static int a21_wdt_probe(struct platform_device *pdev)
else if (reset == 7)
a21_wdt.bootstatus |= WDIOF_EXTERN2;
+ drv->wdt = a21_wdt;
+ dev_set_drvdata(&pdev->dev, drv);
+
ret = watchdog_register_device(&a21_wdt);
if (ret) {
dev_err(&pdev->dev, "Cannot register watchdog device\n");
goto err_register_wd;
}
- dev_set_drvdata(&pdev->dev, drv);
-
dev_info(&pdev->dev, "MEN A21 watchdog timer driver enabled\n");
return 0;