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Message-Id: <1464676296-5610-6-git-send-email-edubezval@gmail.com> Date: Mon, 30 May 2016 23:31:26 -0700 From: Eduardo Valentin <edubezval@...il.com> To: Rui Zhang <rui.zhang@...el.com> Cc: Linux PM <linux-pm@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, Eduardo Valentin <edubezval@...il.com> Subject: [PATCH 05/15] thermal: sysfs: lock tz while on trip_point_hyst properties Serialized calls to tz.ops in user facing sysfs handler trip_point_hyst_store() and trip_point_hyst_show(). Cc: Zhang Rui <rui.zhang@...el.com> Cc: linux-pm@...r.kernel.org Cc: linux-kernel@...r.kernel.org Signed-off-by: Eduardo Valentin <edubezval@...il.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 32f410f..afb42a2 100644 --- a/drivers/thermal/thermal_sysfs.c +++ b/drivers/thermal/thermal_sysfs.c @@ -208,7 +208,9 @@ trip_point_hyst_store(struct device *dev, struct device_attribute *attr, * here. The driver implementing 'set_trip_hyst' has to * take care of this. */ + mutex_lock(&tz->lock); ret = tz->ops->set_trip_hyst(tz, trip, temperature); + mutex_unlock(&tz->lock); return ret ? ret : count; } @@ -227,7 +229,9 @@ trip_point_hyst_show(struct device *dev, struct device_attribute *attr, if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip) != 1) return -EINVAL; + mutex_lock(&tz->lock); ret = tz->ops->get_trip_hyst(tz, trip, &temperature); + mutex_unlock(&tz->lock); return ret ? ret : sprintf(buf, "%d\n", temperature); } -- 2.1.4
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