Patch "r8169: fix jumbo packet handling on RTL8168e" has been added to the 5.10-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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 5.10-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-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 4c4de7b9dcc4b79e6b9eaf37c92d563d5c827fa4
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 75f774347f6d1..cfcc3ac613189 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2351,14 +2351,14 @@ 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);
 }