ar71xx: ag71xx: store maximum frame length in the ag71xx struct

This will allow to use different values for the
different SoCs.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 39117

target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h

@@ -168,6 +168,8 @@ struct ag71xx {
 	unsigned int		speed;
 	int			duplex;
 
+	unsigned int		max_frame_len;
+
 	struct work_struct	restart_work;
 	struct delayed_work	link_work;
 	struct timer_list	oom_timer;

target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c

@@ -434,7 +434,7 @@ static void ag71xx_hw_setup(struct ag71xx *ag)
 		  MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK);
 
 	/* setup max frame length */
-	ag71xx_wr(ag, AG71XX_REG_MAC_MFL, AG71XX_TX_MTU_LEN);
+	ag71xx_wr(ag, AG71XX_REG_MAC_MFL, ag->max_frame_len);
 
 	/* setup FIFO configuration registers */
 	ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT);
@@ -1048,8 +1048,10 @@ static void ag71xx_netpoll(struct net_device *dev)
 
 static int ag71xx_change_mtu(struct net_device *dev, int new_mtu)
 {
+	struct ag71xx *ag = netdev_priv(dev);
+
 	if (new_mtu < 68 ||
-	    new_mtu > AG71XX_TX_MTU_LEN - ETH_HLEN - ETH_FCS_LEN)
+	    new_mtu > ag->max_frame_len - ETH_HLEN - ETH_FCS_LEN)
 		return -EINVAL;
 
 	dev->mtu = new_mtu;
@@ -1164,6 +1166,8 @@ static int ag71xx_probe(struct platform_device *pdev)
 	ag->tx_ring.size = AG71XX_TX_RING_SIZE_DEFAULT;
 	ag->rx_ring.size = AG71XX_RX_RING_SIZE_DEFAULT;
 
+	ag->max_frame_len = AG71XX_TX_MTU_LEN;
+
 	ag->stop_desc = dma_alloc_coherent(NULL,
 		sizeof(struct ag71xx_desc), &ag->stop_desc_dma, GFP_KERNEL);