linux-kernel - [PATCH net] net: phy: air_en8811h: reset netdev rules when LED is set manually

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Date: Wed, 8 May 2024 01:51:39 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	SkyLake Huang <skylake.huang@...iatek.com>,
	Eric Woudstra <ericwouds@...il.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: John Crispin <john@...ozen.org>
Subject: [PATCH net] net: phy: air_en8811h: reset netdev rules when LED is
 set manually

Setting LED_OFF via the brightness_set should deactivate hw control,
so make sure netdev trigger rules also get cleared in that case.
This matches the behaviour when using the 'netdev' trigger without
any hardware offloading and fixes unwanted memory of the default
netdev trigger rules when another trigger (or no trigger) had been
selected meanwhile.

Fixes: 71e79430117d ("net: phy: air_en8811h: Add the Airoha EN8811H PHY driver")
Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
This is basically a stop-gap measure until unified LED handling has
been implemented accross all MediaTek and Airoha PHYs.
See also
https://patchwork.kernel.org/project/netdevbpf/patch/20240425023325.15586-3-SkyLake.Huang@mediatek.com/

 drivers/net/phy/air_en8811h.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/phy/air_en8811h.c b/drivers/net/phy/air_en8811h.c
index 4c9a1c9c805e..3cdc8c6b30b6 100644
--- a/drivers/net/phy/air_en8811h.c
+++ b/drivers/net/phy/air_en8811h.c
@@ -544,6 +544,10 @@ static int air_hw_led_on_set(struct phy_device *phydev, u8 index, bool on)
 
 	changed |= (priv->led[index].rules != 0);
 
+	/* clear netdev trigger rules in case LED_OFF has been set */
+	if (!on)
+		priv->led[index].rules = 0;
+
 	if (changed)
 		return phy_modify_mmd(phydev, MDIO_MMD_VEND2,
 				      AIR_PHY_LED_ON(index),
-- 
2.45.0