From 2830a6d20139df2198d63235df7957712adb28e5 Mon Sep 17 00:00:00 2001 From: Vincent Palatin Date: Thu, 4 Oct 2012 17:13:52 -0700 Subject: [PATCH] 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 Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/rtc/class.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index dc4c2748bbc3..37b1d82fda08 100644 --- a/drivers/rtc/class.c +++ b/drivers/rtc/class.c @@ -238,6 +238,7 @@ void rtc_device_unregister(struct rtc_device *rtc) rtc_proc_del_device(rtc); device_unregister(&rtc->dev); rtc->ops = NULL; + ida_simple_remove(&rtc_ida, rtc->id); mutex_unlock(&rtc->ops_lock); put_device(&rtc->dev); } -- 2.20.1