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Date:	Thu,  2 Aug 2012 16:53:25 -0700
From:	Vincent Palatin <>
Cc:	Alessandro Zummo <>,,
	Vincent Palatin <>
Subject: [PATCH] rtc: recycle id when unloading a rtc driver

When calling rtc_device_unregister, we are not freeing the id used by the
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 <>
 drivers/rtc/class.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index dc4c274..37b1d82 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -238,6 +238,7 @@ void rtc_device_unregister(struct rtc_device *rtc)
 		rtc->ops = NULL;
+		ida_simple_remove(&rtc_ida, rtc->id);

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