Serialized calls to cdev->ops in user facing sysfs handlers thermal_cooling_device_cur_state_show() and thermal_cooling_device_cur_state_store().
Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> --- 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 3eaa081..ab78e08 100644 --- a/drivers/thermal/thermal_sysfs.c +++ b/drivers/thermal/thermal_sysfs.c @@ -715,7 +715,9 @@ thermal_cooling_device_cur_state_show(struct device *dev, unsigned long state; int ret; + mutex_lock(&cdev->lock); ret = cdev->ops->get_cur_state(cdev, &state); + mutex_unlock(&cdev->lock); if (ret) return ret; return sprintf(buf, "%ld\n", state); @@ -736,7 +738,9 @@ thermal_cooling_device_cur_state_store(struct device *dev, if ((long)state < 0) return -EINVAL; + mutex_lock(&cdev->lock); result = cdev->ops->set_cur_state(cdev, state); + mutex_unlock(&cdev->lock); if (result) return result; return count; -- 2.1.4
