linux-kernel - [PATCH] PM / devfreq: Check dev_set

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Message-Id: <20241211031829.2257107-1-make_ruc2021@163.com>
Date: Wed, 11 Dec 2024 11:18:29 +0800
From: Ma Ke <make_ruc2021@....com>
To: cw00.choi@...sung.com,
	myungjoo.ham@...sung.com,
	kyungmin.park@...sung.com
Cc: linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ma Ke <make_ruc2021@....com>,
	stable@...r.kernel.org
Subject: [PATCH] PM / devfreq: Check dev_set_name() return value

It's possible that dev_set_name() returns -ENOMEM. We could catch and
handle it by adding dev_set_name() return value check.

Cc: stable@...r.kernel.org
Fixes: 775fa8c3aa22 ("PM / devfreq: Simplify the sysfs name of devfreq-event device")
Signed-off-by: Ma Ke <make_ruc2021@....com>
---
 drivers/devfreq/devfreq-event.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c
index 3ebac2496679..9479fbe71eda 100644
--- a/drivers/devfreq/devfreq-event.c
+++ b/drivers/devfreq/devfreq-event.c
@@ -328,7 +328,10 @@ struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
 	edev->dev.class = devfreq_event_class;
 	edev->dev.release = devfreq_event_release_edev;
 
-	dev_set_name(&edev->dev, "event%d", atomic_inc_return(&event_no));
+	ret = dev_set_name(&edev->dev, "event%d", atomic_inc_return(&event_no));
+	if (ret)
+		return ERR_PTR(-ENOMEM);
+
 	ret = device_register(&edev->dev);
 	if (ret < 0) {
 		put_device(&edev->dev);
-- 
2.25.1