linux-kernel - [PATCH 4.18 061/135] r8169: set RX_MULTI_EN bit in RxConfig for 8168F-family chips

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Date:   Tue, 16 Oct 2018 19:04:51 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chris Clayton <chris2553@...glemail.com>,
        "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.18 061/135] r8169: set RX_MULTI_EN bit in RxConfig for 8168F-family chips

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>

[ Upstream commit 511cfd580f23b0e0fcd5659931ef14c6e2c062b0 ]

It has been reported that since
commit 05212ba8132b42 ("r8169: set RxConfig after tx/rx is enabled for RTL8169sb/8110sb devices")
at least RTL_GIGA_MAC_VER_38 NICs work erratically after a resume from
suspend.
The problem has been traced to a missing RX_MULTI_EN bit in the RxConfig
register.
We already set this bit for RTL_GIGA_MAC_VER_35 NICs of the same 8168F
chip family so let's do it also for its other siblings: RTL_GIGA_MAC_VER_36
and RTL_GIGA_MAC_VER_38.

Curiously, the NIC seems to work fine after a system boot without having
this bit set as long as the system isn't suspended and resumed.

Fixes: 05212ba8132b42 ("r8169: set RxConfig after tx/rx is enabled for RTL8169sb/8110sb devices")
Reported-by: Chris Clayton <chris2553@...glemail.com>
Signed-off-by: Maciej S. Szmigiero <mail@...iej.szmigiero.name>
Reviewed-by: Heiner Kallweit <hkallweit1@...il.com>
Tested-by: Chris Clayton <chris2553@...glemail.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/realtek/r8169.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -4788,8 +4788,8 @@ static void rtl_init_rxcfg(struct rtl816
 		RTL_W32(tp, RxConfig, RX_FIFO_THRESH | RX_DMA_BURST);
 		break;
 	case RTL_GIGA_MAC_VER_18 ... RTL_GIGA_MAC_VER_24:
-	case RTL_GIGA_MAC_VER_34:
-	case RTL_GIGA_MAC_VER_35:
+	case RTL_GIGA_MAC_VER_34 ... RTL_GIGA_MAC_VER_36:
+	case RTL_GIGA_MAC_VER_38:
 		RTL_W32(tp, RxConfig, RX128_INT_EN | RX_MULTI_EN | RX_DMA_BURST);
 		break;
 	case RTL_GIGA_MAC_VER_40 ... RTL_GIGA_MAC_VER_51: