rtc: recycle id when unloading a rtc driver
When calling rtc_device_unregister, we are not freeing the id used by the driver. So when doing a unload/load cycle for a RTC driver (e.g. rmmod rtc_cmos && modprobe rtc_cmos), its id is incremented by one. As a consequence, we no longer have neither an rtc0 driver nor a /proc/driver/rtc (as it only exists for the first driver). Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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2830a6d201
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@ -238,6 +238,7 @@ void rtc_device_unregister(struct rtc_device *rtc)
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rtc_proc_del_device(rtc);
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device_unregister(&rtc->dev);
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rtc->ops = NULL;
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ida_simple_remove(&rtc_ida, rtc->id);
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mutex_unlock(&rtc->ops_lock);
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put_device(&rtc->dev);
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}
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