From: Daniel Lezcano Date: Thu, 19 Oct 2017 17:05:48 +0000 (+0200) Subject: thermal/drivers/hisi: Remove pointless lock X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2d4fa7b4c6f8080ced2e8237c9f46fb1fc110d64;p=linux.git thermal/drivers/hisi: Remove pointless lock 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 Reviewed-by: Leo Yan Signed-off-by: Eduardo Valentin --- diff --git a/drivers/thermal/hisi_thermal.c b/drivers/thermal/hisi_thermal.c index f5231974504c1..9ec5f290b8506 100644 --- a/drivers/thermal/hisi_thermal.c +++ b/drivers/thermal/hisi_thermal.c @@ -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);