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Fix failure exits in asus-laptop

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Fallout from f8a7c6fe14f556ca8eeddce258cb21392d0c3a2f.  However, looking
at it shows that checks done in ASUS_LED_UNREGISTER() can't trigger
at all (we never get to asus_led_exit() if registration fails) and
if that registration fails, we actually leak stuff.  IOW, it's worse
than just replacing class_dev with dev in there - the tests themselves
had been papering over the lousy cleanup logics.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Karol Kozimor <sziwan@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Al Viro 2007-07-23 18:43:54 -07:00 committed by Linus Torvalds
parent c51aea80a9
commit d316ee5787
1 changed files with 21 additions and 11 deletions
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32
drivers/misc/asus-laptop.c
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@ -1067,19 +1067,16 @@ static void asus_backlight_exit(void)
}
#define ASUS_LED_UNREGISTER(object) \
if(object##_led.class_dev \
&& !IS_ERR(object##_led.class_dev)) \
led_classdev_unregister(&object##_led)
led_classdev_unregister(&object##_led)
static void asus_led_exit(void)
{
destroy_workqueue(led_workqueue);
ASUS_LED_UNREGISTER(mled);
ASUS_LED_UNREGISTER(tled);
ASUS_LED_UNREGISTER(pled);
ASUS_LED_UNREGISTER(rled);
ASUS_LED_UNREGISTER(gled);
destroy_workqueue(led_workqueue);
}
static void __exit asus_laptop_exit(void)
@ -1135,29 +1132,42 @@ static int asus_led_init(struct device *dev)
rv = ASUS_LED_REGISTER(mled, dev);
if (rv)
return rv;
goto out;
rv = ASUS_LED_REGISTER(tled, dev);
if (rv)
return rv;
goto out1;
rv = ASUS_LED_REGISTER(rled, dev);
if (rv)
return rv;
goto out2;
rv = ASUS_LED_REGISTER(pled, dev);
if (rv)
return rv;
goto out3;
rv = ASUS_LED_REGISTER(gled, dev);
if (rv)
return rv;
goto out4;
led_workqueue = create_singlethread_workqueue("led_workqueue");
if (!led_workqueue)
return -ENOMEM;
goto out5;
return 0;
out5:
rv = -ENOMEM;
ASUS_LED_UNREGISTER(gled);
out4:
ASUS_LED_UNREGISTER(pled);
out3:
ASUS_LED_UNREGISTER(rled);
out2:
ASUS_LED_UNREGISTER(tled);
out1:
ASUS_LED_UNREGISTER(mled);
out:
return rv;
}
static int __init asus_laptop_init(void)