IPv6: Print error value when skb allocation fails

Print-out the error value when sock_alloc_send_skb() fails in
the IPv6 neighbor discovery code - can be useful for debugging.

Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index e09f12e..1d13d99 100644 (file)
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -465,8 +465,8 @@ struct sk_buff *ndisc_build_skb(struct net_device *dev,
                                  1, &err);
        if (!skb) {
                ND_PRINTK0(KERN_ERR
-                          "ICMPv6 ND: %s() failed to allocate an skb.\n",
-                          __func__);
+                          "ICMPv6 ND: %s() failed to allocate an skb, err=%d.\n",
+                          __func__, err);
                return NULL;
        }
 
@@ -1562,8 +1562,8 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
                                   1, &err);
        if (buff == NULL) {
                ND_PRINTK0(KERN_ERR
-                          "ICMPv6 Redirect: %s() failed to allocate an skb.\n",
-                          __func__);
+                          "ICMPv6 Redirect: %s() failed to allocate an skb, err=%d.\n",
+                          __func__, err);
                goto release;
        }