From fdb5cc6ab3b6a1c0122d3644a63ef9dc7a610d35 Mon Sep 17 00:00:00 2001 From: Andre Edich Date: Mon, 29 Mar 2021 11:45:36 +0200 Subject: [PATCH] net: phy: lan87xx: fix access to wrong register of LAN87xx MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The function lan87xx_config_aneg_ext was introduced to configure LAN95xxA but as well writes to undocumented register of LAN87xx. This fix prevents that access. The function lan87xx_config_aneg_ext gets more suitable for the new behavior name. Reported-by: Måns Rullgård Fixes: 05b35e7eb9a1 ("smsc95xx: add phylib support") Signed-off-by: Andre Edich Signed-off-by: David S. Miller --- drivers/net/phy/smsc.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c index ddb78fb4d6dc..d8cac02a79b9 100644 --- a/drivers/net/phy/smsc.c +++ b/drivers/net/phy/smsc.c @@ -185,10 +185,13 @@ static int lan87xx_config_aneg(struct phy_device *phydev) return genphy_config_aneg(phydev); } -static int lan87xx_config_aneg_ext(struct phy_device *phydev) +static int lan95xx_config_aneg_ext(struct phy_device *phydev) { int rc; + if (phydev->phy_id != 0x0007c0f0) /* not (LAN9500A or LAN9505A) */ + return lan87xx_config_aneg(phydev); + /* Extend Manual AutoMDIX timer */ rc = phy_read(phydev, PHY_EDPD_CONFIG); if (rc < 0) @@ -441,7 +444,7 @@ static struct phy_driver smsc_phy_driver[] = { .read_status = lan87xx_read_status, .config_init = smsc_phy_config_init, .soft_reset = smsc_phy_reset, - .config_aneg = lan87xx_config_aneg_ext, + .config_aneg = lan95xx_config_aneg_ext, /* IRQ related */ .config_intr = smsc_phy_config_intr,