[PATCH 4.19 173/247] r8169: fix jumbo packet handling on RTL8168e
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-03-01 21:03:36
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Subsystem:
8169 10/100/1000 gigabit ethernet driver, networking drivers, the rest · Maintainers:
Heiner Kallweit, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Heiner Kallweit <hkallweit1@gmail.com> [ 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 Oškera <redacted> Tested-by: Josef Oškera <redacted> Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Link: https://lore.kernel.org/r/b15ddef7-0d50-4320-18f4-6a3f86fbfd3e@gmail.com (local) Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/net/ethernet/realtek/r8169.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 6b901bf1cd54d..6fd1a639ec533 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c@@ -4365,7 +4365,7 @@ 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); rtl_tx_performance_tweak(tp, PCI_EXP_DEVCTL_READRQ_512B);
@@ -4373,7 +4373,7 @@ static void r8168e_hw_jumbo_enable(struct rtl8169_private *tp) 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); rtl_tx_performance_tweak(tp, PCI_EXP_DEVCTL_READRQ_4096B);
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2.27.0