From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eduardo Valentin Subject: [PATCH 12/15] thermal: sysfs: lock cdev while accessing max_state Date: Mon, 30 May 2016 23:31:33 -0700 Message-ID: <1464676296-5610-13-git-send-email-edubezval@gmail.com> References: <1464676296-5610-1-git-send-email-edubezval@gmail.com> Return-path: Received: from mail-pa0-f68.google.com ([209.85.220.68]:36108 "EHLO mail-pa0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1162133AbcEaGc3 (ORCPT ); Tue, 31 May 2016 02:32:29 -0400 In-Reply-To: <1464676296-5610-1-git-send-email-edubezval@gmail.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Rui Zhang Cc: Linux PM , LKML , Eduardo Valentin Serialized calls to cdev->ops in user facing sysfs handler thermal_cooling_device_max_state_show(). Cc: Zhang Rui Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eduardo Valentin --- drivers/thermal/thermal_sysfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c index 044090a..3eaa081 100644 --- a/drivers/thermal/thermal_sysfs.c +++ b/drivers/thermal/thermal_sysfs.c @@ -699,7 +699,9 @@ thermal_cooling_device_max_state_show(struct device *dev, unsigned long state; int ret; + mutex_lock(&cdev->lock); ret = cdev->ops->get_max_state(cdev, &state); + mutex_unlock(&cdev->lock); if (ret) return ret; return sprintf(buf, "%ld\n", state); -- 2.1.4