[PATCH 04/15] thermal: sysfs: lock tz while on trip_point_temp properties

Eduardo Valentin
2016-05-31T06:32:21Z

Serialized calls to tz.ops in user facing
sysfs handler trip_point_temp_show() and trip_point_temp_store().

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 | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
index b69036e..32f410f 100644
--- a/drivers/thermal/thermal_sysfs.c
+++ b/drivers/thermal/thermal_sysfs.c
@@ -151,7 +151,9 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr,
if (kstrtoint(buf, 10, &temperature))
return -EINVAL;

+ mutex_lock(&tz->lock);
ret = tz->ops->set_trip_temp(tz, trip, temperature);
+ mutex_unlock(&tz->lock);
if (ret)
return ret;

@@ -174,7 +176,9 @@ trip_point_temp_show(struct device *dev, struct device_attribute *attr,
if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) != 1)
return -EINVAL;

+ mutex_lock(&tz->lock);
ret = tz->ops->get_trip_temp(tz, trip, &temperature);
+ mutex_unlock(&tz->lock);

if (ret)
return ret;
--
2.1.4