[net-next PATCH v2] net: phy: Validate PHY LED OPs presence before registering

From: Christian Marangi
Date: Fri Oct 04 2024 - 15:50:56 EST


Validate PHY LED OPs presence before registering and parsing them.
Defining LED nodes for a PHY driver that actually doesn't supports them
is redundant and useless.

It's also the case with Generic PHY driver used and a DT having LEDs
node for the specific PHY.

Skip it and report the error with debug print enabled.

Signed-off-by: Christian Marangi <ansuelsmth@xxxxxxxxx>
---
Changes v2:
- Use phydev_dbg instead of warn

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 499797646580..e3aff78945a2 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -3421,6 +3421,16 @@ 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_dbg(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) {
@@ -3430,6 +3440,7 @@ static int of_phy_leds(struct phy_device *phydev)
}
}

+exit:
of_node_put(leds);
return 0;
}
--
2.45.2