[PATCH v1 07/11] thermal/drivers/bcm2835: Remove buggy call to thermal_of_zone_unregister

[Daniel Lezcano]

The driver is using the devm_thermal_of_zone_device_register().

In the error path of the function calling
devm_thermal_of_zone_device_register(), the function
devm_thermal_of_zone_unregister() should be called instead of
thermal_of_zone_unregister(), otherwise this one will be called twice
when the device is freed.

The same happens for the remove function where the devm_ guarantee the
thermal_of_zone_unregister() will be called, so adding this call in
the remove function will lead to a double free also.

Use devm_ variant in the error path of the probe function.

Remove thermal_of_zone_unregister() in the remove function.

Cc: Florian Fainelli <f.fainelli at gmail.com>
Cc: Ray Jui <rjui at broadcom.com>
Cc: Scott Branden <sbranden at broadcom.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano at linaro.org>
---
 drivers/thermal/broadcom/bcm2835_thermal.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/broadcom/bcm2835_thermal.c b/drivers/thermal/broadcom/bcm2835_thermal.c
index a217d832f24e..ea07152a6d0d 100644
--- a/drivers/thermal/broadcom/bcm2835_thermal.c
+++ b/drivers/thermal/broadcom/bcm2835_thermal.c
@@ -269,13 +269,13 @@ static int bcm2835_thermal_probe(struct platform_device *pdev)
 	 */
 	err = thermal_add_hwmon_sysfs(tz);
 	if (err)
-		goto err_tz;
+		goto err_clk;
 
 	bcm2835_thermal_debugfs(pdev);
 
 	return 0;
 err_tz:
-	thermal_of_zone_unregister(tz);
+	devm_thermal_of_zone_unregister(&pdev->dev, tz);
 err_clk:
 	clk_disable_unprepare(data->clk);
 
@@ -285,10 +285,8 @@ static int bcm2835_thermal_probe(struct platform_device *pdev)
 static int bcm2835_thermal_remove(struct platform_device *pdev)
 {
 	struct bcm2835_thermal_data *data = platform_get_drvdata(pdev);
-	struct thermal_zone_device *tz = data->tz;
 
 	debugfs_remove_recursive(data->debugfsdir);
-	thermal_of_zone_unregister(tz);
 	clk_disable_unprepare(data->clk);
 
 	return 0;
-- 
2.34.1