[ 3.5.y.z extended stable ] Patch "r8169: honor jumbo settings when chipset is requested to" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    r8169: honor jumbo settings when chipset is requested to

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 6404c20e3e37b77390d591cc892d454424d2c43f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?fran=C3=A7ois=20romieu?= <romieu at fr.zoreil.com>
Date: Wed, 27 Feb 2013 13:01:57 +0000
Subject: [PATCH] r8169: honor jumbo settings when chipset is requested to
 start.

commit faf1e7857a1b87cd8baf48c3e962142e21ad417c upstream.

Some hardware start settings implicitely assume an usual 1500 bytes mtu
that can't be guaranteed because changes of mtu may be requested both
before and after the hardware is started.

Reported-by: Tomi Orava <tomimo at ncircle.nullnet.fi>
Signed-off-by: Francois Romieu <romieu at fr.zoreil.com>
Cc: Hayes Wang <hayeswang at realtek.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/net/ethernet/realtek/r8169.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 6c595f9..f250232 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -4574,8 +4574,10 @@ static void rtl_hw_start_8168bb(struct rtl8169_private *tp)

 	RTL_W16(CPlusCmd, RTL_R16(CPlusCmd) & ~R8168_CPCMD_QUIRK_MASK);

-	rtl_tx_performance_tweak(pdev,
-		(0x5 << MAX_READ_REQUEST_SHIFT) | PCI_EXP_DEVCTL_NOSNOOP_EN);
+	if (tp->dev->mtu <= ETH_DATA_LEN) {
+		rtl_tx_performance_tweak(pdev, (0x5 << MAX_READ_REQUEST_SHIFT) |
+					 PCI_EXP_DEVCTL_NOSNOOP_EN);
+	}
 }

 static void rtl_hw_start_8168bef(struct rtl8169_private *tp)
@@ -4598,7 +4600,8 @@ static void __rtl_hw_start_8168cp(struct rtl8169_private *tp)

 	RTL_W8(Config3, RTL_R8(Config3) & ~Beacon_en);

-	rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
+	if (tp->dev->mtu <= ETH_DATA_LEN)
+		rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);

 	rtl_disable_clock_request(pdev);

@@ -4632,7 +4635,8 @@ static void rtl_hw_start_8168cp_2(struct rtl8169_private *tp)

 	RTL_W8(Config3, RTL_R8(Config3) & ~Beacon_en);

-	rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
+	if (tp->dev->mtu <= ETH_DATA_LEN)
+		rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);

 	RTL_W16(CPlusCmd, RTL_R16(CPlusCmd) & ~R8168_CPCMD_QUIRK_MASK);
 }
@@ -4651,7 +4655,8 @@ static void rtl_hw_start_8168cp_3(struct rtl8169_private *tp)

 	RTL_W8(MaxTxPacketSize, TxPacketMax);

-	rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
+	if (tp->dev->mtu <= ETH_DATA_LEN)
+		rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);

 	RTL_W16(CPlusCmd, RTL_R16(CPlusCmd) & ~R8168_CPCMD_QUIRK_MASK);
 }
@@ -4712,7 +4717,8 @@ static void rtl_hw_start_8168d(struct rtl8169_private *tp)

 	RTL_W8(MaxTxPacketSize, TxPacketMax);

-	rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
+	if (tp->dev->mtu <= ETH_DATA_LEN)
+		rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);

 	RTL_W16(CPlusCmd, RTL_R16(CPlusCmd) & ~R8168_CPCMD_QUIRK_MASK);
 }
@@ -4724,7 +4730,8 @@ static void rtl_hw_start_8168dp(struct rtl8169_private *tp)

 	rtl_csi_access_enable_1(tp);

-	rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
+	if (tp->dev->mtu <= ETH_DATA_LEN)
+		rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);

 	RTL_W8(MaxTxPacketSize, TxPacketMax);

@@ -4783,7 +4790,8 @@ static void rtl_hw_start_8168e_1(struct rtl8169_private *tp)

 	rtl_ephy_init(ioaddr, e_info_8168e_1, ARRAY_SIZE(e_info_8168e_1));

-	rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
+	if (tp->dev->mtu <= ETH_DATA_LEN)
+		rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);

 	RTL_W8(MaxTxPacketSize, TxPacketMax);

@@ -4809,7 +4817,8 @@ static void rtl_hw_start_8168e_2(struct rtl8169_private *tp)

 	rtl_ephy_init(ioaddr, e_info_8168e_2, ARRAY_SIZE(e_info_8168e_2));

-	rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
+	if (tp->dev->mtu <= ETH_DATA_LEN)
+		rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);

 	rtl_eri_write(ioaddr, 0xc0, ERIAR_MASK_0011, 0x0000, ERIAR_EXGMAC);
 	rtl_eri_write(ioaddr, 0xb8, ERIAR_MASK_0011, 0x0000, ERIAR_EXGMAC);
--
1.8.1.2