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rtc: class: remove unnecessary device_get() in rtc_device_unregister 

Technically the address of rtc->dev can never be NULL, so get_device()
can never fail. Also caller of rtc_device_unregister() supposed to be
the owner of the device and thus have a valid reference. Therefore
call to get_device() is not needed here.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
hifive-unleashed-5.1
Dmitry Torokhov 2015-07-20 16:02:50 -07:00 committed by Alexandre Belloni
parent 6706664d92
commit c3b399a4b6
1 changed files with 12 additions and 13 deletions
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25
drivers/rtc/class.c
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@ -266,19 +266,18 @@ EXPORT_SYMBOL_GPL(rtc_device_register);
*/
void rtc_device_unregister(struct rtc_device *rtc)
{
if (get_device(&rtc->dev) != NULL) {
mutex_lock(&rtc->ops_lock);
/* remove innards of this RTC, then disable it, before
* letting any rtc_class_open() users access it again
*/
rtc_sysfs_del_device(rtc);
rtc_dev_del_device(rtc);
rtc_proc_del_device(rtc);
device_unregister(&rtc->dev);
rtc->ops = NULL;
mutex_unlock(&rtc->ops_lock);
put_device(&rtc->dev);
}
mutex_lock(&rtc->ops_lock);
/*
* Remove innards of this RTC, then disable it, before
* letting any rtc_class_open() users access it again
*/
rtc_sysfs_del_device(rtc);
rtc_dev_del_device(rtc);
rtc_proc_del_device(rtc);
device_del(&rtc->dev);
rtc->ops = NULL;
mutex_unlock(&rtc->ops_lock);
put_device(&rtc->dev);
}
EXPORT_SYMBOL_GPL(rtc_device_unregister);