From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Li Fei , Ohad Ben-Cohen Subject: [ 19/29] hwspinlock: fix __hwspin_lock_request error path Date: Wed, 10 Apr 2013 15:49:37 -0700 Message-Id: <20130410224806.057230969@linuxfoundation.org> In-Reply-To: <20130410224804.061806042@linuxfoundation.org> References: <20130410224804.061806042@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Li Fei 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 Signed-off-by: Li Fei [edit commit log] Signed-off-by: Ohad Ben-Cohen Signed-off-by: Greg Kroah-Hartman --- 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; }