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Subject[PATCH 2/3] thermal: core: Move cdev cleanup to thermal_release()
Date
thermal_release() already frees cdev, let it do rest of the cleanup as
well in order to simplify the error paths in
__thermal_cooling_device_register().

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/thermal/thermal_core.c | 33 ++++++++++++++-------------------
1 file changed, 14 insertions(+), 19 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 77bd47d976a2..1fb109a97ff6 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -774,6 +774,9 @@ static void thermal_release(struct device *dev)
} else if (!strncmp(dev_name(dev), "cooling_device",
sizeof("cooling_device") - 1)) {
cdev = to_cooling_device(dev);
+ thermal_cooling_device_destroy_sysfs(cdev);
+ kfree(cdev->type);
+ ida_free(&thermal_cdev_ida, cdev->id);
kfree(cdev);
}
}
@@ -909,23 +912,21 @@ __thermal_cooling_device_register(struct device_node *np,
cdev->devdata = devdata;

ret = cdev->ops->get_max_state(cdev, &cdev->max_state);
- if (ret) {
- kfree(cdev->type);
- goto out_ida_remove;
- }
+ if (ret)
+ goto out_cdev_type;

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_ida_remove;
- }
+ if (ret)
+ goto out_cooling_dev;

ret = device_register(&cdev->device);
- if (ret)
- goto out_kfree_type;
+ if (ret) {
+ /* thermal_release() handles rest of the cleanup */
+ put_device(&cdev->device);
+ return ERR_PTR(ret);
+ }

/* Add 'this' new cdev to the global cdev list */
mutex_lock(&thermal_list_lock);
@@ -944,13 +945,10 @@ __thermal_cooling_device_register(struct device_node *np,

return cdev;

-out_kfree_type:
+out_cooling_dev:
thermal_cooling_device_destroy_sysfs(cdev);
+out_cdev_type:
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);
out_kfree_cdev:
@@ -1111,10 +1109,7 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev)

mutex_unlock(&thermal_list_lock);

- ida_free(&thermal_cdev_ida, cdev->id);
device_del(&cdev->device);
- thermal_cooling_device_destroy_sysfs(cdev);
- kfree(cdev->type);
put_device(&cdev->device);
}
EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister);
--
2.31.1.272.g89b43f80a514
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