ar71xx: ag71xx: compute the RX buffer size from the maximum frame size

Currently, the AG71XX_RX_PKT_SIZE value limits the received
frame size to 1514/1516 bytes with/without a VLAN header
respectively. However the hardware limit is controlled by
the value the AG71XX_REG_MAC_MFL register which contains
the value of the max_frame_len field.

Compute the RX buffer size from the max_frame_len field
to get rid of the 1514/1516 byte limitation. Also remove
the unused AG71XX_RX_PKT_SIZE definition.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39121 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h
index f3f9f14..b0df017 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h
+++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h
@@ -51,8 +51,6 @@
 #define AG71XX_INT_INIT        (AG71XX_INT_ERR | AG71XX_INT_POLL)
 
 #define AG71XX_TX_MTU_LEN      1540
-#define AG71XX_RX_PKT_SIZE     \
-       (ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN)
 
 #define AG71XX_TX_RING_SIZE_DEFAULT    32
 #define AG71XX_RX_RING_SIZE_DEFAULT    128

diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
index 04e1e58..622ffed 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
@@ -609,7 +609,7 @@ static int ag71xx_open(struct net_device *dev)
        struct ag71xx *ag = netdev_priv(dev);
        int ret;
 
-       ag->rx_buf_size = AG71XX_RX_PKT_SIZE + NET_SKB_PAD + NET_IP_ALIGN;
+       ag->rx_buf_size = ag->max_frame_len + NET_SKB_PAD + NET_IP_ALIGN;
 
        ret = ag71xx_rings_init(ag);
        if (ret)