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>

1 files changed, 6 insertions, 6 deletions

diff --git a/net/caif/chnl_net.c b/net/caif/chnl_net.c
index 865690948bbc..a751d9b263ed 100644
--- 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;
         }