[PATCH 6.1 137/313] thermal: core: call put_device() only after device_register() fails

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From: Viresh Kumar <viresh.kumar@xxxxxxxxxx>

[ Upstream commit 6c54b7bc8a31ce0f7cc7f8deef05067df414f1d8 ]

put_device() shouldn't be called before a prior call to
device_register(). __thermal_cooling_device_register() doesn't follow
that properly and needs fixing. Also
thermal_cooling_device_destroy_sysfs() is getting called unnecessarily
on few error paths.

Fix all this by placing the calls at the right place.

Based on initial work done by Caleb Connolly.

Fixes: 4748f9687caa ("thermal: core: fix some possible name leaks in error paths")
Fixes: c408b3d1d9bb ("thermal: Validate new state in cur_state_store()")
Reported-by: Caleb Connolly <caleb.connolly@xxxxxxxxxx>
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Tested-by: Frank Rowand <frowand.list@xxxxxxxxx>
Reviewed-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Tested-by: Caleb Connolly <caleb.connolly@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/thermal/thermal_core.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 449e60c4a1b6..1eae4ec719a8 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -893,15 +893,20 @@ __thermal_cooling_device_register(struct device_node *np,
 	cdev->devdata = devdata;
 
 	ret = cdev->ops->get_max_state(cdev, &cdev->max_state);
-	if (ret)
-		goto out_kfree_type;
+	if (ret) {
+		kfree(cdev->type);
+		goto out_ida_remove;
+	}
 
 	thermal_cooling_device_setup_sysfs(cdev);
+
 	ret = dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
 	if (ret) {
+		kfree(cdev->type);
 		thermal_cooling_device_destroy_sysfs(cdev);
-		goto out_kfree_type;
+		goto out_ida_remove;
 	}
+
 	ret = device_register(&cdev->device);
 	if (ret)
 		goto out_kfree_type;
@@ -927,6 +932,8 @@ __thermal_cooling_device_register(struct device_node *np,
 	thermal_cooling_device_destroy_sysfs(cdev);
 	kfree(cdev->type);
 	put_device(&cdev->device);
+
+	/* thermal_release() takes care of the rest */
 	cdev = NULL;
 out_ida_remove:
 	ida_free(&thermal_cdev_ida, id);
-- 
2.39.0






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