Messages in this thread Patch in this message | | | From | Eduardo Valentin <> | Subject | [PATCH 12/15] thermal: sysfs: lock cdev while accessing max_state | Date | Mon, 30 May 2016 23:31:33 -0700 |
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Serialized calls to cdev->ops in user facing sysfs handler thermal_cooling_device_max_state_show().
Cc: Zhang Rui <rui.zhang@intel.com> Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eduardo Valentin <edubezval@gmail.com> --- 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
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