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platform-drivers-x86: eeepc-laptop: fix wrong test for successful registered led_classdev

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device_create returns &struct device pointer on success, or ERR_PTR() on error.
Thus if led_classdev_register fails, led_cdev->dev is always not NULL.

If IS_ERR(eeepc->tpd_led.dev) is ture, it means led_classdev_register fails.
If (asus->tpd_led.dev) is NULL, it means we call eeepc_led_exit before
calling led_classdev_register for &eeepc->tpd_led.

We only want to call led_classdev_unregister for sucessfully registered
led_classdev, then we should check (!IS_ERR_OR_NULL(eeepc->tpd_led.dev)).

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Axel Lin 2011-08-08 17:14:19 +08:00 committed by Matthew Garrett
parent 33989ba6f7
commit 5d6afd1503
1 changed files with 1 additions and 1 deletions
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drivers/platform/x86/eeepc-laptop.c
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@ -568,7 +568,7 @@ static int eeepc_led_init(struct eeepc_laptop *eeepc)
static void eeepc_led_exit(struct eeepc_laptop *eeepc) static void eeepc_led_exit(struct eeepc_laptop *eeepc)
{ {
if (eeepc->tpd_led.dev) if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev))
led_classdev_unregister(&eeepc->tpd_led); led_classdev_unregister(&eeepc->tpd_led);
if (eeepc->led_workqueue) if (eeepc->led_workqueue)
destroy_workqueue(eeepc->led_workqueue); destroy_workqueue(eeepc->led_workqueue);