iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

r8169: don't advertise pause in jumbo mode

Browse Source 
[ Upstream commit 453a77894efa4d9b6ef9644d74b9419c47ac427c ]

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: 9cf9b84cc701 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Heiner Kallweit 2021-04-14 10:47:10 +02:00 committed by Greg Kroah-Hartman
parent c5934da725
commit 4f0cda5e9e
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/net/ethernet/realtek/r8169_main.c
View File

@ -4138,6 +4138,13 @@ 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)
@ -6314,8 +6321,6 @@ 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;