From 767099f0ec5ba9a53daf8d6b23f88593f5ab507c Mon Sep 17 00:00:00 2001 From: Heiner Kallweit Date: Wed, 24 Nov 2021 08:16:25 +0100 Subject: lan743x: fix deadlock in lan743x_phy_link_status_change() commit ddb826c2c92d461f290a7bab89e7c28696191875 upstream. Usage of phy_ethtool_get_link_ksettings() in the link status change handler isn't needed, and in combination with the referenced change it results in a deadlock. Simply remove the call and replace it with direct access to phydev->speed. The duplex argument of lan743x_phy_update_flowcontrol() isn't used and can be removed. Fixes: c10a485c3de5 ("phy: phy_ethtool_ksettings_get: Lock the phy for consistency") Reported-by: Alessandro B Maurici Tested-by: Alessandro B Maurici Signed-off-by: Heiner Kallweit Reviewed-by: Andrew Lunn Link: https://lore.kernel.org/r/40e27f76-0ba3-dcef-ee32-a78b9df38b0f@gmail.com Signed-off-by: Jakub Kicinski [dannf: adjust context] Signed-off-by: dann frazier Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/microchip/lan743x_main.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) (limited to 'drivers/net/ethernet') diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c index 22beeb5be9c4..c69ffcfe6168 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.c +++ b/drivers/net/ethernet/microchip/lan743x_main.c @@ -916,8 +916,7 @@ static int lan743x_phy_reset(struct lan743x_adapter *adapter) } static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter, - u8 duplex, u16 local_adv, - u16 remote_adv) + u16 local_adv, u16 remote_adv) { struct lan743x_phy *phy = &adapter->phy; u8 cap; @@ -944,22 +943,17 @@ static void lan743x_phy_link_status_change(struct net_device *netdev) phy_print_status(phydev); if (phydev->state == PHY_RUNNING) { - struct ethtool_link_ksettings ksettings; int remote_advertisement = 0; int local_advertisement = 0; - memset(&ksettings, 0, sizeof(ksettings)); - phy_ethtool_get_link_ksettings(netdev, &ksettings); local_advertisement = linkmode_adv_to_mii_adv_t(phydev->advertising); remote_advertisement = linkmode_adv_to_mii_adv_t(phydev->lp_advertising); - lan743x_phy_update_flowcontrol(adapter, - ksettings.base.duplex, - local_advertisement, + lan743x_phy_update_flowcontrol(adapter, local_advertisement, remote_advertisement); - lan743x_ptp_update_latency(adapter, ksettings.base.speed); + lan743x_ptp_update_latency(adapter, phydev->speed); } } -- cgit v1.2.3