This is a note to let you know that I've just added the patch titled
hwspinlock: fix __hwspin_lock_request error path
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hwspinlock-fix-__hwspin_lock_request-error-path.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c10b90d85a5126d25c89cbaa50dc9fdd1c4d001a Mon Sep 17 00:00:00 2001
From: Li Fei <fei.li@xxxxxxxxx>
Date: Fri, 5 Apr 2013 21:20:36 +0800
Subject: hwspinlock: fix __hwspin_lock_request error path
From: Li Fei <fei.li@xxxxxxxxx>
commit c10b90d85a5126d25c89cbaa50dc9fdd1c4d001a upstream.
Even in failed case of pm_runtime_get_sync, the usage_count
is incremented. In order to keep the usage_count with correct
value and runtime power management to behave correctly, call
pm_runtime_put_noidle in such case.
In __hwspin_lock_request, module_put is also called before
return in pm_runtime_get_sync failed case.
Signed-off-by Liu Chuansheng <chuansheng.liu@xxxxxxxxx>
Signed-off-by: Li Fei <fei.li@xxxxxxxxx>
[edit commit log]
Signed-off-by: Ohad Ben-Cohen <ohad@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hwspinlock/hwspinlock_core.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/hwspinlock/hwspinlock_core.c
+++ b/drivers/hwspinlock/hwspinlock_core.c
@@ -416,6 +416,8 @@ static int __hwspin_lock_request(struct
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
dev_err(dev, "%s: can't power on device\n", __func__);
+ pm_runtime_put_noidle(dev);
+ module_put(dev->driver->owner);
return ret;
}
Patches currently in stable-queue which might be from fei.li@xxxxxxxxx are
queue-3.4/hwspinlock-fix-__hwspin_lock_request-error-path.patch
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