This is a note to let you know that I've just added the patch titled watchdog: Use put_device on error to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: watchdog-use-put_device-on-error.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 1d5a4ef5f53b988d84cc8e205f9630706f8bc51d Author: Dinghao Liu <dinghao.liu@xxxxxxxxxx> Date: Mon Aug 24 11:12:30 2020 +0800 watchdog: Use put_device on error [ Upstream commit 937425d4cd3ae4e2882b41e332bbbab616bcf0ad ] We should use put_device() instead of freeing device directly after device_initialize(). Fixes: cb36e29bb0e4b ("watchdog: initialize device before misc_register") Signed-off-by: Dinghao Liu <dinghao.liu@xxxxxxxxxx> Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx> Link: https://lore.kernel.org/r/20200824031230.31050-1-dinghao.liu@xxxxxxxxxx Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx> Signed-off-by: Wim Van Sebroeck <wim@xxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index 694357f2816b3..8494846ccdc5f 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -1000,7 +1000,7 @@ 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); + put_device(&wd_data->dev); return err; } }