ar71xx: fix broken LAN ports on the boards with AR8216 switch (closes #7024)

[openwrt.git] / target / linux / ar71xx / files / drivers / net / ag71xx / ag71xx_main.c

diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
index 3cf4f5e..4b35b1f 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
@@ -614,7 +614,8 @@ static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb,
        if (!ag71xx_desc_empty(desc))
                goto err_drop;
 
-       ag71xx_add_ar8216_header(ag, skb);
+       if (ag71xx_has_ar8216(ag))
+               ag71xx_add_ar8216_header(ag, skb);
 
        if (skb->len <= 0) {
                DBG("%s: packet len is too small\n", ag->dev->name);
@@ -758,6 +759,25 @@ static int ag71xx_tx_packets(struct ag71xx *ag)
        return sent;
 }
 
+static int ag71xx_rx_copy_skb(struct ag71xx *ag, struct sk_buff **pskb,
+                             int pktlen)
+{
+       struct sk_buff *copy_skb;
+
+       copy_skb = netdev_alloc_skb(ag->dev, pktlen + NET_IP_ALIGN);
+       if (!copy_skb)
+               return -ENOMEM;
+
+       skb_reserve(copy_skb, NET_IP_ALIGN);
+       skb_copy_from_linear_data(*pskb, copy_skb->data, pktlen);
+       skb_put(copy_skb, pktlen);
+
+       dev_kfree_skb_any(*pskb);
+       *pskb = copy_skb;
+
+       return 0;
+}
+
 static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
 {
        struct net_device *dev = ag->dev;
@@ -772,7 +792,7 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
                struct ag71xx_desc *desc = ring->buf[i].desc;
                struct sk_buff *skb;
                int pktlen;
-               int err;
+               int err = 0;
 
                if (ag71xx_desc_empty(desc))
                        break;
@@ -795,13 +815,15 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
                dev->stats.rx_packets++;
                dev->stats.rx_bytes += pktlen;
 
-               err = ag71xx_remove_ar8216_header(ag, skb);
+               if (ag71xx_has_ar8216(ag))
+                       err = ag71xx_remove_ar8216_header(ag, skb, pktlen);
+               else
+                       err = ag71xx_rx_copy_skb(ag, &skb, pktlen);
+
                if (err) {
                        dev->stats.rx_dropped++;
                        kfree_skb(skb);
                } else {
-                       skb_put(skb, pktlen);
-
                        skb->dev = dev;
                        skb->ip_summed = CHECKSUM_NONE;
                        skb->protocol = eth_type_trans(skb, dev);