Staging: batman-adv: avoid having the same error message more than once

The routing code has 2 sections which warn about ttl exceeded. The
corresponding warnings were identical which makes it hard to debug. In
addition, batman-adv does not need to warn about ttl exceeded in case
we encountered an echo request as this is commonly used to generate
traceroute graphs.

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 8 insertions, 6 deletions

diff --git a/drivers/staging/batman-adv/routing.c b/drivers/staging/batman-adv/routing.c
index 09917e57b41c..8abaa6193ac3 100644
--- a/drivers/staging/batman-adv/routing.c
+++ b/drivers/staging/batman-adv/routing.c
@@ -655,14 +655,15 @@ static int recv_icmp_ttl_exceeded(struct sk_buff *skb)
         unsigned long flags;
         uint8_t dstaddr[ETH_ALEN];
 
-        icmp_packet = (struct icmp_packet *) skb->data;
-        ethhdr = (struct ethhdr *) skb_mac_header(skb);
-
-        printk(KERN_WARNING "batman-adv:Warning - can't send packet from %pM to %pM: ttl exceeded\n", icmp_packet->orig, icmp_packet->dst);
+        icmp_packet = (struct icmp_packet *)skb->data;
+        ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
         /* send TTL exceeded if packet is an echo request (traceroute) */
-        if (icmp_packet->msg_type != ECHO_REQUEST)
+        if (icmp_packet->msg_type != ECHO_REQUEST) {
+                printk(KERN_WARNING "batman-adv:Warning - can't forward icmp packet from %pM to %pM: ttl exceeded\n",
+                        icmp_packet->orig, icmp_packet->dst);
                 return NET_RX_DROP;
+        }
 
         /* get routing information */
         spin_lock_irqsave(&orig_hash_lock, flags);
@@ -825,7 +826,8 @@ int recv_unicast_packet(struct sk_buff *skb)
 
         /* TTL exceeded */
         if (unicast_packet->ttl < 2) {
-                printk(KERN_WARNING "batman-adv:Warning - can't send packet from %pM to %pM: ttl exceeded\n", ethhdr->h_source, unicast_packet->dest);
+                printk(KERN_WARNING "batman-adv:Warning - can't forward unicast packet from %pM to %pM: ttl exceeded\n",
+                       ethhdr->h_source, unicast_packet->dest);
                 return NET_RX_DROP;
         }