From 5e00e16cb98935bcf06f51931876d898c226f65c Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Sat, 9 Jan 2021 23:01:18 +0100
Subject: [PATCH] r8169: tweak max read request size for newer chips also in jumbo mtu mode
Git-commit: 5e00e16cb98935bcf06f51931876d898c226f65c
Patch-mainline: v5.12-rc1
References: git-fixes

So far we don't increase the max read request size if we switch to
jumbo mode before bringing up the interface for the first time.
Let's change this.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/ethernet/realtek/r8169_main.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index c4c2647c54e7..bfcc64db8803 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2341,13 +2341,14 @@ static void r8168b_1_hw_jumbo_disable(struct rtl8169_private *tp)
 static void rtl_jumbo_config(struct rtl8169_private *tp)
 {
 	bool jumbo = tp->dev->mtu > ETH_DATA_LEN;
+	int readrq = 4096;
 
 	rtl_unlock_config_regs(tp);
 	switch (tp->mac_version) {
 	case RTL_GIGA_MAC_VER_12:
 	case RTL_GIGA_MAC_VER_17:
 		if (jumbo) {
-			pcie_set_readrq(tp->pci_dev, 512);
+			readrq = 512;
 			r8168b_1_hw_jumbo_enable(tp);
 		} else {
 			r8168b_1_hw_jumbo_disable(tp);
@@ -2355,7 +2356,7 @@ static void rtl_jumbo_config(struct rtl8169_private *tp)
 		break;
 	case RTL_GIGA_MAC_VER_18 ... RTL_GIGA_MAC_VER_26:
 		if (jumbo) {
-			pcie_set_readrq(tp->pci_dev, 512);
+			readrq = 512;
 			r8168c_hw_jumbo_enable(tp);
 		} else {
 			r8168c_hw_jumbo_disable(tp);
@@ -2378,8 +2379,8 @@ static void rtl_jumbo_config(struct rtl8169_private *tp)
 	}
 	rtl_lock_config_regs(tp);
 
-	if (!jumbo && pci_is_pcie(tp->pci_dev) && tp->supports_gmii)
-		pcie_set_readrq(tp->pci_dev, 4096);
+	if (pci_is_pcie(tp->pci_dev) && tp->supports_gmii)
+		pcie_set_readrq(tp->pci_dev, readrq);
 }
 
 DECLARE_RTL_COND(rtl_chipcmd_cond)
-- 
2.26.2