linux-kernel - [PATCH] watchdog: Check dev_set

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Message-ID: <20220920020312.2383-1-liubo03@inspur.com>
Date:   Mon, 19 Sep 2022 22:03:12 -0400
From:   Bo Liu <liubo03@...pur.com>
To:     <wim@...ux-watchdog.org>, <linux@...ck-us.net>
CC:     <linux-watchdog@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Bo Liu <liubo03@...pur.com>
Subject: [PATCH] watchdog: Check dev_set_name() return value

It's possible that dev_set_name() returns -ENOMEM, catch and handle this.

Signed-off-by: Bo Liu <liubo03@...pur.com>
---
 drivers/watchdog/watchdog_dev.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 54903f3c851e..744b2ab75288 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -1015,7 +1015,11 @@ static int watchdog_cdev_register(struct watchdog_device *wdd)
 	wd_data->dev.groups = wdd->groups;
 	wd_data->dev.release = watchdog_core_data_release;
 	dev_set_drvdata(&wd_data->dev, wdd);
-	dev_set_name(&wd_data->dev, "watchdog%d", wdd->id);
+	err = dev_set_name(&wd_data->dev, "watchdog%d", wdd->id);
+	if (err) {
+		put_device(&wd_data->dev);
+		return err;
+	}
 
 	kthread_init_work(&wd_data->work, watchdog_ping_work);
 	hrtimer_init(&wd_data->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD);
-- 
2.27.0