diff mbox series

[v4,2/6] thermal: thermal_of: Stop zone device before unregistering it

Message ID 20210616190417.32214-3-digetx@gmail.com
State Accepted
Commit 5e5c9f9a75fc4532980c2e699caf8a36070a3a2e
Headers show
Series Add driver for NVIDIA Tegra30 SoC Thermal sensor | expand

Commit Message

Dmitry Osipenko June 16, 2021, 7:04 p.m. UTC 
Zone device is enabled after thermal_zone_of_sensor_register() completion,
but it's not disabled before senor is unregistered, leaving temperature
polling active. This results in accessing a disabled zone device and
produces a warning about this problem. Stop zone device before
unregistering it in order to fix this "use-after-free" problem.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/thermal/thermal_of.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index 5b76f9a1280d..6379f26a335f 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -559,6 +559,9 @@  void thermal_zone_of_sensor_unregister(struct device *dev,
 	if (!tz)
 		return;
 
+	/* stop temperature polling */
+	thermal_zone_device_disable(tzd);
+
 	mutex_lock(&tzd->lock);
 	tzd->ops->get_temp = NULL;
 	tzd->ops->get_trend = NULL;