When misc_register() fails, wd_data will be released by the
release callback function watchdog_core_data_release(), so
we don't need to free it again. But when watchdog_kworker is
NULL, we should free wd_data to prevent memleak.
Fixes: cb36e29bb0e4b ("watchdog: initialize device before misc_register")
Signed-off-by: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
---
drivers/watchdog/watchdog_dev.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 6798addabd5a..8ee78e26feb1 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -994,8 +994,10 @@ static int watchdog_cdev_register(struct watchdog_device *wdd)
wd_data->wdd = wdd;
wdd->wd_data = wd_data;
- if (IS_ERR_OR_NULL(watchdog_kworker))
+ if (IS_ERR_OR_NULL(watchdog_kworker)) {
+ kfree(wd_data);
return -ENODEV;
+ }
device_initialize(&wd_data->dev);
wd_data->dev.devt = MKDEV(MAJOR(watchdog_devt), wdd->id);
@@ -1021,7 +1023,6 @@ static int watchdog_cdev_register(struct watchdog_device *wdd)
pr_err("%s: a legacy watchdog module is probably present.\n",
wdd->info->identity);
old_wd_data = NULL;
- kfree(wd_data);
return err;
}
}
--
2.17.1
