FAILED: patch "[PATCH] r8169: don't advertise pause in jumbo mode" failed to apply to 5.11-stable tree

The patch below does not apply to the 5.11-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 <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

Quoted 1 line

From 453a77894efa4d9b6ef9644d74b9419c47ac427c Mon Sep 17 00:00:00 2001

From: Heiner Kallweit <[email protected]>
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 <[email protected]>

Tested-by Roman Mamedov <[email protected]>

Signed-off-by Heiner Kallweit <[email protected]>

Cc [email protected]

Signed-off-by David S. Miller <[email protected]>

drivers/net/ethernet/realtek/r8169_main.c +7 -2

index 581a92fc3292..1df2c002c9f6 100644
@@ -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 ed6aaf67921a7ed44a3e07785c2125835ca5a969 Mon Sep 17 00:00:00 2001