From 5127d1fc23d372f391681d5406fe567e6cc01aac Mon Sep 17 00:00:00 2001
From: DENG Qingfang <dqfext@gmail.com>
Date: Thu, 18 Feb 2021 11:45:14 +0800
Subject: [PATCH 11/14] net: ag71xx: remove unnecessary MTU reservation
Git-commit: 04b385f325080157ab1b5f8ce1b1de07ce0d9e27
Patch-mainline: v5.12-rc1
References: git-fixes
2 bytes of the MTU are reserved for Atheros DSA tag, but DSA core
has already handled that since commit dc0fe7d47f9f.
Remove the unnecessary reservation.
Fixes: d51b6ce441d3 ("net: ethernet: add ag71xx driver")
Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20210218034514.3421-1-dqfext@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
drivers/net/ethernet/atheros/ag71xx.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/atheros/ag71xx.c b/drivers/net/ethernet/atheros/ag71xx.c
index 203ab0adb81e..131fc49462c9 100644
--- a/drivers/net/ethernet/atheros/ag71xx.c
+++ b/drivers/net/ethernet/atheros/ag71xx.c
@@ -222,8 +222,6 @@
#define AG71XX_REG_RX_SM 0x01b0
#define AG71XX_REG_TX_SM 0x01b4
-#define ETH_SWITCH_HEADER_LEN 2
-
#define AG71XX_DEFAULT_MSG_ENABLE \
(NETIF_MSG_DRV \
| NETIF_MSG_PROBE \
@@ -784,7 +782,7 @@ static void ag71xx_hw_setup(struct ag71xx *ag)
static unsigned int ag71xx_max_frame_len(unsigned int mtu)
{
- return ETH_SWITCH_HEADER_LEN + ETH_HLEN + VLAN_HLEN + mtu + ETH_FCS_LEN;
+ return ETH_HLEN + VLAN_HLEN + mtu + ETH_FCS_LEN;
}
static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
--
2.16.4