caif: Add drop count for caif_net device.

Count dropped packets in CAIF Netdevice.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/caif/chnl_net.c b/net/caif/chnl_net.c
index 865690948bbc7da373cbb12a3abd6c787cb1b7cb..a751d9b263edb10b665f744050510bb5bb01a2e1 100644 (file)
--- a/net/caif/chnl_net.c
+++ b/net/caif/chnl_net.c
@@ -74,7 +74,6 @@ static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
        struct sk_buff *skb;
        struct chnl_net *priv  = container_of(layr, struct chnl_net, chnl);
        int pktlen;
-       int err = 0;
        const u8 *ip_version;
        u8 buf;
 
@@ -95,8 +94,7 @@ static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
 
        /* check the version of IP */
        ip_version = skb_header_pointer(skb, 0, 1, &buf);
-       if (!ip_version)
-               return -EINVAL;
+
        switch (*ip_version >> 4) {
        case 4:
                skb->protocol = htons(ETH_P_IP);
@@ -105,6 +103,7 @@ static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
                skb->protocol = htons(ETH_P_IPV6);
                break;
        default:
+               priv->netdev->stats.rx_errors++;
                return -EINVAL;
        }
 
@@ -123,7 +122,7 @@ static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
        priv->netdev->stats.rx_packets++;
        priv->netdev->stats.rx_bytes += pktlen;
 
-       return err;
+       return 0;
 }
 
 static int delete_device(struct chnl_net *dev)
@@ -221,11 +220,13 @@ static int chnl_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
        if (skb->len > priv->netdev->mtu) {
                pr_warn("Size of skb exceeded MTU\n");
+               dev->stats.tx_errors++;
                return -ENOSPC;
        }
 
        if (!priv->flowenabled) {
                pr_debug("dropping packets flow off\n");
+               dev->stats.tx_dropped++;
                return NETDEV_TX_BUSY;
        }
 
@@ -240,8 +241,7 @@ static int chnl_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
        /* Send the packet down the stack. */
        result = priv->chnl.dn->transmit(priv->chnl.dn, pkt);
        if (result) {
-               if (result == -EAGAIN)
-                       result = NETDEV_TX_BUSY;
+               dev->stats.tx_dropped++;
                return result;
        }