If the core is left to remove the LEDs via devm_, it is performed too
late, after the PHY driver is removed from the PHY. This results in
dereferencing a NULL pointer when the LED core tries to turn the LED
off before destroying the LED.
Manually unregister the LEDs at a safe point in phy_remove.
Cc: stable@vger.kernel.org
Reported-by: Florian Fainelli <f.fainelli@gmail.com>
Suggested-by: Florian Fainelli <f.fainelli@gmail.com>
Fixes:
01e5b728e9e4 ("net: phy: Add a binding for PHY LEDs")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
+static void phy_leds_unregister(struct phy_device *phydev)
+{
+ struct phy_led *phyled;
+
+ list_for_each_entry(phyled, &phydev->leds, list) {
+ led_classdev_unregister(&phyled->led_cdev);
+ }
+}
+
static int of_phy_led(struct phy_device *phydev,
struct device_node *led)
{
static int of_phy_led(struct phy_device *phydev,
struct device_node *led)
{
init_data.fwnode = of_fwnode_handle(led);
init_data.devname_mandatory = true;
init_data.fwnode = of_fwnode_handle(led);
init_data.devname_mandatory = true;
- err = devm_led_classdev_register_ext(dev, cdev, &init_data);
+ err = led_classdev_register_ext(dev, cdev, &init_data);
err = of_phy_led(phydev, led);
if (err) {
of_node_put(led);
err = of_phy_led(phydev, led);
if (err) {
of_node_put(led);
+ phy_leds_unregister(phydev);
cancel_delayed_work_sync(&phydev->state_queue);
cancel_delayed_work_sync(&phydev->state_queue);
+ if (IS_ENABLED(CONFIG_PHYLIB_LEDS))
+ phy_leds_unregister(phydev);
+
phydev->state = PHY_DOWN;
sfp_bus_del_upstream(phydev->sfp_bus);
phydev->state = PHY_DOWN;
sfp_bus_del_upstream(phydev->sfp_bus);