linux-kernel - [PATCH 5/5 V2] hwspinlock/core: call pm_runtime_put in pm_runtime_get

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Date:	Fri, 05 Apr 2013 21:20:36 +0800
From:	Li Fei <fei.li@...el.com>
To:	ohad@...ery.com, rjw@...k.pl
Cc:	linux-kernel@...r.kernel.org, chuansheng.liu@...el.com,
	fei.li@...el.com
Subject: [PATCH 5/5 V2] hwspinlock/core: call pm_runtime_put in
 pm_runtime_get_sync failed case


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(_sync) 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@...el.com>
Signed-off-by: Li Fei <fei.li@...el.com>
---
 drivers/hwspinlock/hwspinlock_core.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/hwspinlock/hwspinlock_core.c b/drivers/hwspinlock/hwspinlock_core.c
index db713c0..461a0d7 100644
--- a/drivers/hwspinlock/hwspinlock_core.c
+++ b/drivers/hwspinlock/hwspinlock_core.c
@@ -416,6 +416,8 @@ static int __hwspin_lock_request(struct hwspinlock *hwlock)
 	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;
 	}
 
-- 
1.7.4.1



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