From: Sonny Rao <sonny@burdell.org>
Date: Tue, 27 Jun 2006 09:54:06 +0000 (-0700)
Subject: [PATCH] rtc: fix idr locking
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=6ac12dfe9c2027cd3c5ed603f11d1bb4f04906fe;p=openwrt%2Fstaging%2Fblogic.git

[PATCH] rtc: fix idr locking

We need to serialize access to the global rtc_idr even in this error path.

Signed-off-by: Sonny Rao <sonny@burdell.org>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index 5396beec30d0..1cb61a761cb2 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -94,7 +94,9 @@ exit_kfree:
 	kfree(rtc);
 
 exit_idr:
+	mutex_lock(&idr_lock);
 	idr_remove(&rtc_idr, id);
+	mutex_unlock(&idr_lock);
 
 exit:
 	dev_err(dev, "rtc core: unable to register %s, err = %d\n",