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net: ag71xx: remove unnecessary MTU reservation 

commit 04b385f325080157ab1b5f8ce1b1de07ce0d9e27 upstream.

2 bytes of the MTU are reserved for Atheros DSA tag, but DSA core
has already handled that since commit dc0fe7d47f.
Remove the unnecessary reservation.

Fixes: d51b6ce441 ("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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
DENG Qingfang 2021-02-18 11:45:14 +08:00 committed by Greg Kroah-Hartman
parent ad112654e2
commit e4fc812e35
1 changed files with 1 additions and 3 deletions
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4
drivers/net/ethernet/atheros/ag71xx.c
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@ -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)