openwrt/target/linux/generic/backport-6.1/821-v6.4-net-phy-Fix-reading-LED-reg-property.patch

From aed8fdad2152d946add50bec00a6b07c457bdcdf Mon Sep 17 00:00:00 2001
From: Alexander Stein <alexander.stein@ew.tq-group.com>
Date: Mon, 24 Apr 2023 16:16:48 +0200
Subject: [PATCH] net: phy: Fix reading LED reg property

'reg' is always encoded in 32 bits, thus it has to be read using the
function with the corresponding bit width.

Fixes: 01e5b728e9e4 ("net: phy: Add a binding for PHY LEDs")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230424141648.317944-1-alexander.stein@ew.tq-group.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 drivers/net/phy/phy_device.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -3075,6 +3075,7 @@ static int of_phy_led(struct phy_device
 	struct led_init_data init_data = {};
 	struct led_classdev *cdev;
 	struct phy_led *phyled;
+	u32 index;
 	int err;
 
 	phyled = devm_kzalloc(dev, sizeof(*phyled), GFP_KERNEL);
@@ -3084,10 +3085,13 @@ static int of_phy_led(struct phy_device
 	cdev = &phyled->led_cdev;
 	phyled->phydev = phydev;
 
-	err = of_property_read_u8(led, "reg", &phyled->index);
+	err = of_property_read_u32(led, "reg", &index);
 	if (err)
 		return err;
+	if (index > U8_MAX)
+		return -EINVAL;
 
+	phyled->index = index;
 	if (phydev->drv->led_brightness_set)
 		cdev->brightness_set_blocking = phy_led_set_brightness;
 	if (phydev->drv->led_blink_set)