[net-next PATCH] net: phy: Validate PHY LED OPs presence before registering

[Christian Marangi <ansuelsmth@gmail.com>]

Validate PHY LED OPs presence before registering and parsing them.
Defining LED nodes for a PHY driver that actually doesn't supports them
is wrong and should be reported.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/net/phy/phy_device.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index af088bf00bae..ce154a54bfa4 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -3426,6 +3426,16 @@ static int of_phy_leds(struct phy_device *phydev)
 	if (!leds)
 		return 0;
 
+	/* Check if the PHY driver have at least an OP to
+	 * set the LEDs.
+	 */
+	if (!phydev->drv->led_brightness_set &&
+	    !phydev->drv->led_blink_set &&
+	    !phydev->drv->led_hw_control_set) {
+		phydev_err(phydev, "ignoring leds node defined with no PHY driver support\n");
+		goto exit;
+	}
+
 	for_each_available_child_of_node_scoped(leds, led) {
 		err = of_phy_led(phydev, led);
 		if (err) {
@@ -3435,6 +3445,7 @@ static int of_phy_leds(struct phy_device *phydev)
 		}
 	}
 
+exit:
 	of_node_put(leds);
 	return 0;
 }
-- 
2.45.2