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thermal/drivers/hisi: Remove pointless lock

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The threaded interrupt inspect the sensors structure to look in the temp
threshold field, but this field is read-only in all the code, except in the
probe function before the threaded interrupt is set. In other words there
is not race window in the threaded interrupt when reading the field value.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Daniel Lezcano 2017-10-19 19:05:48 +02:00 committed by Eduardo Valentin
parent db2b033260
commit 2d4fa7b4c6
1 changed files with 1 additions and 5 deletions
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6
drivers/thermal/hisi_thermal.c
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@ -221,14 +221,10 @@ static irqreturn_t hisi_thermal_alarm_irq(int irq, void *dev)
static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev)
{
struct hisi_thermal_data *data = dev;
struct hisi_thermal_sensor *sensor;
mutex_lock(&data->thermal_lock);
sensor = &data->sensors;
struct hisi_thermal_sensor *sensor = &data->sensors;
dev_crit(&data->pdev->dev, "THERMAL ALARM: T > %d\n",
sensor->thres_temp);
mutex_unlock(&data->thermal_lock);
thermal_zone_device_update(data->sensors.tzd,
THERMAL_EVENT_UNSPECIFIED);