r8169: don't advertise pause in jumbo mode

It has been reported [0] that using pause frames in jumbo mode impacts
performance. There's no available chip documentation, but vendor
drivers r8168 and r8125 don't advertise pause in jumbo mode. So let's
do the same, according to Roman it fixes the issue.

[0] https://bugzilla.kernel.org/show_bug.cgi?id=212617

Fixes: 3a4c10c1471b ("r8169: make use of phy_set_asym_pause")
Reported-by: Roman Mamedov <rm+bko@romanrm.net>
Tested-by: Roman Mamedov <rm+bko@romanrm.net>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 581a92fc32924f1cc7953142d85a7bfaf7733e56..1df2c002c9f642a1e047cbbb122d383ddb01dc4f 100644 (file)
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2350,6 +2350,13 @@ static void rtl_jumbo_config(struct rtl8169_private *tp)
 
        if (pci_is_pcie(tp->pci_dev) && tp->supports_gmii)
                pcie_set_readrq(tp->pci_dev, readrq);
+
+       /* Chip doesn't support pause in jumbo mode */
+       linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+                        tp->phydev->advertising, !jumbo);
+       linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+                        tp->phydev->advertising, !jumbo);
+       phy_start_aneg(tp->phydev);
 }
 
 DECLARE_RTL_COND(rtl_chipcmd_cond)
@@ -4630,8 +4637,6 @@ static int r8169_phy_connect(struct rtl8169_private *tp)
        if (!tp->supports_gmii)
                phy_set_max_speed(phydev, SPEED_100);
 
-       phy_support_asym_pause(phydev);
-
        phy_attached_info(phydev);
 
        return 0;