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Message-Id: <1464676296-5610-14-git-send-email-edubezval@gmail.com> Date: Mon, 30 May 2016 23:31:34 -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 13/15] thermal: sysfs: lock cdev while accessing cur_state 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 <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 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
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