ACPI: platform_profile: Fix memory leak in profile_class_is_visible()

If class_find_device() finds a device, it's reference count is
incremented.

Call put_device() to drop this reference before returning.

Fixes: 77be5ca ("ACPI: platform_profile: Create class for ACPI platform profile")
Signed-off-by: Kurt Borja <[email protected]>
Reviewed-by: Mark Pearson <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Rafael J. Wysocki <[email protected]>

Author: kuu-rt

drivers/acpi/platform_profile.c

@@ -417,8 +417,14 @@ static int profile_class_registered(struct device *dev, const void *data)
 
 static umode_t profile_class_is_visible(struct kobject *kobj, struct attribute *attr, int idx)
 {
-	if (!class_find_device(&platform_profile_class, NULL, NULL, profile_class_registered))
+	struct device *dev;
+
+	dev = class_find_device(&platform_profile_class, NULL, NULL, profile_class_registered);
+	if (!dev)
 		return 0;
+
+	put_device(dev);
+
 	return attr->mode;
 }