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hwmon: Fix possible NULL pointer

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The recent addition of the label attribute added some code that read the
"label" device property, without checking first that "dev" was non-NULL.

Fix this issue by first checking that "dev" is non-NULL.

Fixes: ccd98cba6a18 ("hwmon: Add "label" attribute")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Paul Cercueil 2022-01-31 16:27:40 +00:00 committed by Guenter Roeck
parent 9f93aa1005
commit 07320c9156
1 changed files with 1 additions and 1 deletions
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drivers/hwmon/hwmon.c
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@ -809,7 +809,7 @@ __hwmon_device_register(struct device *dev, const char *name, void *drvdata,
hdev->groups = groups;
}
if (device_property_present(dev, "label")) {
if (dev && device_property_present(dev, "label")) {
err = device_property_read_string(dev, "label", &label);
if (err < 0)
goto free_hwmon;