[PATCH 5.15.y] r8169: fix RTL8117 Wake-on-Lan in DASH mode

[Sasha Levin <sashal@kernel.org>]

From: René Rebe <rene@exactco.de>

[ Upstream commit dd75c723ef566f7f009c047f47e0eee95fe348ab ]

Wake-on-Lan does currently not work for r8169 in DASH mode, e.g. the
ASUS Pro WS X570-ACE with RTL8168fp/RTL8117.

Fix by not returning early in rtl_prepare_power_down when dash_enabled.
While this fixes WoL, it still kills the OOB RTL8117 remote management
BMC connection. Fix by not calling rtl8168_driver_stop if WoL is enabled.

Fixes: 065c27c184d6 ("r8169: phy power ops")
Signed-off-by: René Rebe <rene@exactco.de>
Cc: stable@vger.kernel.org
Reviewed-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://patch.msgid.link/20251202.194137.1647877804487085954.rene@exactco.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
[ adapted tp->dash_enabled check to tp->dash_type != RTL_DASH_NONE comparison ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/realtek/r8169_main.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 6b5bf7d49296..d272e77999cf 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2513,9 +2513,6 @@ static void rtl_wol_enable_rx(struct rtl8169_private *tp)
 
 static void rtl_prepare_power_down(struct rtl8169_private *tp)
 {
-	if (tp->dash_type != RTL_DASH_NONE)
-		return;
-
 	if (tp->mac_version == RTL_GIGA_MAC_VER_32 ||
 	    tp->mac_version == RTL_GIGA_MAC_VER_33)
 		rtl_ephy_write(tp, 0x19, 0xff64);
@@ -4763,7 +4760,7 @@ static void rtl8169_down(struct rtl8169_private *tp)
 
 	rtl_prepare_power_down(tp);
 
-	if (tp->dash_type != RTL_DASH_NONE)
+	if (tp->dash_type != RTL_DASH_NONE && !tp->saved_wolopts)
 		rtl8168_driver_stop(tp);
 }
 
-- 
2.51.0