On Sun, Apr 18, 2021 at 05:53:31PM +0200, Heiner Kallweit wrote:
On 18.04.2021 12:36, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 453a77894efa4d9b6ef9644d74b9419c47ac427c Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Date: Wed, 14 Apr 2021 10:47:10 +0200
Subject: [PATCH] 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: 9cf9b84cc701 ("r8169: make use of phy_set_asym_pause")
Reported-by: Roman Mamedov <rm+bko@xxxxxxxxxxx>
Tested-by: Roman Mamedov <rm+bko@xxxxxxxxxxx>
Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 581a92fc3292..1df2c002c9f6 100644
--- 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;
From 90501465d4f9be209587047db1560a310a9fce1b Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Date: Sun, 18 Apr 2021 17:42:13 +0200
Subject: [PATCH] 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: 9cf9b84cc701 ("r8169: make use of phy_set_asym_pause")
Reported-by: Roman Mamedov <rm+bko@xxxxxxxxxxx>
Tested-by: Roman Mamedov <rm+bko@xxxxxxxxxxx>
Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
I've resolved this by taking 5e00e16cb989 ("r8169: tweak max read
request size for newer chips also in jumbo mtu mode") instead, thanks!
--
Thanks,
Sasha
