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thermal/drivers/core: Use put_device() if device_register() fails

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Never directly free @dev after calling device_register(), even if it
returned an error! Always use put_device() to give up the reference
initialized. Clean up the rollback block also.

Signed-off-by: Yue Hu <huyue2@yulong.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Yue Hu 2019-08-07 11:01:30 +08:00 committed by Zhang Rui
parent 8c7aa18428
commit adc8749b15
1 changed files with 13 additions and 12 deletions
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25
drivers/thermal/thermal_core.c
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@ -985,7 +985,7 @@ __thermal_cooling_device_register(struct device_node *np,
result = device_register(&cdev->device);
if (result) {
ida_simple_remove(&thermal_cdev_ida, cdev->id);
kfree(cdev);
put_device(&cdev->device);
return ERR_PTR(result);
}
@ -1240,6 +1240,7 @@ thermal_zone_device_register(const char *type, int trips, int mask,
struct thermal_zone_device *tz;
enum thermal_trip_type trip_type;
int trip_temp;
int id;
int result;
int count;
struct thermal_governor *governor;
@ -1266,11 +1267,13 @@ thermal_zone_device_register(const char *type, int trips, int mask,
INIT_LIST_HEAD(&tz->thermal_instances);
ida_init(&tz->ida);
mutex_init(&tz->lock);
result = ida_simple_get(&thermal_tz_ida, 0, 0, GFP_KERNEL);
if (result < 0)
id = ida_simple_get(&thermal_tz_ida, 0, 0, GFP_KERNEL);
if (id < 0) {
result = id;
goto free_tz;
}
tz->id = result;
tz->id = id;
strlcpy(tz->type, type, sizeof(tz->type));
tz->ops = ops;
tz->tzp = tzp;
@ -1292,7 +1295,7 @@ thermal_zone_device_register(const char *type, int trips, int mask,
dev_set_name(&tz->device, "thermal_zone%d", tz->id);
result = device_register(&tz->device);
if (result)
goto remove_device_groups;
goto release_device;
for (count = 0; count < trips; count++) {
if (tz->ops->get_trip_type(tz, count, &trip_type))
@ -1343,14 +1346,12 @@ thermal_zone_device_register(const char *type, int trips, int mask,
return tz;
unregister:
ida_simple_remove(&thermal_tz_ida, tz->id);
device_unregister(&tz->device);
return ERR_PTR(result);
remove_device_groups:
thermal_zone_destroy_device_groups(tz);
device_del(&tz->device);
release_device:
put_device(&tz->device);
tz = NULL;
remove_id:
ida_simple_remove(&thermal_tz_ida, tz->id);
ida_simple_remove(&thermal_tz_ida, id);
free_tz:
kfree(tz);
return ERR_PTR(result);