[PATCH net] net: ag71xx: remove unnecessary MTU reservation

From: DENG Qingfang
Date: Wed Feb 17 2021 - 22:46:20 EST


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@xxxxxxxxx>
---
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 dd5c8a9038bb..a60ce9030581 100644
--- a/drivers/net/ethernet/atheros/ag71xx.c
+++ b/drivers/net/ethernet/atheros/ag71xx.c
@@ -223,8 +223,6 @@
#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 \
@@ -933,7 +931,7 @@ 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)
--
2.25.1