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rtc: dev: properly manage lifetime of dev and cdev in rtc device 

struct rtc embeds both struct dev and struct cdev.  Unfortunately character
device structure may outlive the parent rtc structure unless we set it up
as parent of character device so that it will stay pinned until character
device is freed.

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>
This commit is contained in:
Dmitry Torokhov 2015-07-20 16:02:51 -07:00 committed by Alexandre Belloni
parent c3b399a4b6
commit 1e4cd62558
1 changed files with 1 additions and 0 deletions
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drivers/rtc/rtc-dev.c
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@ -477,6 +477,7 @@ void rtc_dev_prepare(struct rtc_device *rtc)
cdev_init(&rtc->char_dev, &rtc_dev_fops);
rtc->char_dev.owner = rtc->owner;
rtc->char_dev.kobj.parent = &rtc->dev.kobj;
}
void rtc_dev_add_device(struct rtc_device *rtc)