[PATCH 01/15] thermal: sysfs: lock tz in type_show

[Eduardo Valentin]

Avoid race while accessing tz->type.

Cc: Zhang Rui <rui.zhang@xxxxxxxxx>
Cc: linux-pm@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Eduardo Valentin <edubezval@xxxxxxxxx>
---
 drivers/thermal/thermal_sysfs.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
index 4136b71..ee983ca 100644
--- a/drivers/thermal/thermal_sysfs.c
+++ b/drivers/thermal/thermal_sysfs.c
@@ -29,8 +29,13 @@ static ssize_t
 type_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct thermal_zone_device *tz = to_thermal_zone(dev);
+	char *type;
 
-	return sprintf(buf, "%s\n", tz->type);
+	mutex_lock(&tz->lock);
+	type = tz->type;
+	mutex_unlock(&tz->lock);
+
+	return sprintf(buf, "%s\n", type);
 }
 
 static ssize_t
-- 
2.1.4