[PATCH 6.6 039/105] r8169: fix packet truncation after S4 resume on RTL8168H/RTL8111H

Greg Kroah-Hartman
2025-10-21T19:54:17Z

From: Linmao Li <lilinmao@kylinos.cn>

[ Upstream commit 70f92ab97042f243e1c8da1c457ff56b9b3e49f1 ]

After resume from S4 (hibernate), RTL8168H/RTL8111H truncates incoming
packets. Packet captures show messages like "IP truncated-ip - 146 bytes
missing!".

The issue is caused by RxConfig not being properly re-initialized after
resume. Re-initializing the RxConfig register before the chip
re-initialization sequence avoids the truncation and restores correct
packet reception.

This follows the same pattern as commit ef9da46ddef0 ("r8169: fix data
corruption issue on RTL8402").

Fixes: 6e1d0b898818 ("r8169:add support for RTL8168H and RTL8107E")
Signed-off-by: Linmao Li <lilinmao@kylinos.cn>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://patch.msgid.link/20251009122549.3955845-1-lilinmao@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/realtek/r8169_main.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 5af932a5e70c4..3b90f257e94f8 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -4919,8 +4919,9 @@ static int rtl8169_resume(struct device *device)
if (!device_may_wakeup(tp_to_dev(tp)))
clk_prepare_enable(tp->clk);

- /* Reportedly at least Asus X453MA truncates packets otherwise */
- if (tp->mac_version == RTL_GIGA_MAC_VER_37)
+ /* Some chip versions may truncate packets without this initialization */
+ if (tp->mac_version == RTL_GIGA_MAC_VER_37 ||
+ tp->mac_version == RTL_GIGA_MAC_VER_46)
rtl_init_rxcfg(tp);

return rtl8169_runtime_resume(device);
--
2.51.0