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 <[email protected]> --- drivers/platform/x86/eeepc-laptop.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c index 1c45d92..29a216a 100644 --- a/drivers/platform/x86/eeepc-laptop.c +++ b/drivers/platform/x86/eeepc-laptop.c @@ -568,7 +568,7 @@ static int eeepc_led_init(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); if (eeepc->led_workqueue) destroy_workqueue(eeepc->led_workqueue); -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
