This is a note to let you know that I've just added the patch titled r8169: fix jumbo packet handling on RTL8168e to the 5.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: r8169-fix-jumbo-packet-handling-on-rtl8168e.patch and it can be found in the queue-5.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 5abfa6297aa8cf2c60f0c6f74daf85d17f3aa84d Author: Heiner Kallweit <hkallweit1@xxxxxxxxx> Date: Thu Feb 25 16:05:19 2021 +0100 r8169: fix jumbo packet handling on RTL8168e [ Upstream commit 6cf739131a15e4177e58a1b4f2bede9d5da78552 ] Josef reported [0] that using jumbo packets fails on RTL8168e. Aligning the values for register MaxTxPacketSize with the vendor driver fixes the problem. [0] https://bugzilla.kernel.org/show_bug.cgi?id=211827 Fixes: d58d46b5d851 ("r8169: jumbo fixes.") Reported-by: Josef OÅ¡kera <joskera@xxxxxxxxxx> Tested-by: Josef OÅ¡kera <joskera@xxxxxxxxxx> Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx> Link: https://lore.kernel.org/r/b15ddef7-0d50-4320-18f4-6a3f86fbfd3e@xxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c index 0d78408b4e269..470ff6b3ebef1 100644 --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -2315,14 +2315,14 @@ static void r8168dp_hw_jumbo_disable(struct rtl8169_private *tp) static void r8168e_hw_jumbo_enable(struct rtl8169_private *tp) { - RTL_W8(tp, MaxTxPacketSize, 0x3f); + RTL_W8(tp, MaxTxPacketSize, 0x24); RTL_W8(tp, Config3, RTL_R8(tp, Config3) | Jumbo_En0); RTL_W8(tp, Config4, RTL_R8(tp, Config4) | 0x01); } static void r8168e_hw_jumbo_disable(struct rtl8169_private *tp) { - RTL_W8(tp, MaxTxPacketSize, 0x0c); + RTL_W8(tp, MaxTxPacketSize, 0x3f); RTL_W8(tp, Config3, RTL_R8(tp, Config3) & ~Jumbo_En0); RTL_W8(tp, Config4, RTL_R8(tp, Config4) & ~0x01); }