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path: root/net/ipv6/mcast_snoop.c
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Diffstat (limited to 'net/ipv6/mcast_snoop.c')
-rw-r--r--net/ipv6/mcast_snoop.c24
1 files changed, 4 insertions, 20 deletions
diff --git a/net/ipv6/mcast_snoop.c b/net/ipv6/mcast_snoop.c
index 9405b04eecc6..1a917dc80d5e 100644
--- a/net/ipv6/mcast_snoop.c
+++ b/net/ipv6/mcast_snoop.c
@@ -136,8 +136,7 @@ static inline __sum16 ipv6_mc_validate_checksum(struct sk_buff *skb)
return skb_checksum_validate(skb, IPPROTO_ICMPV6, ip6_compute_pseudo);
}
-static int __ipv6_mc_check_mld(struct sk_buff *skb,
- struct sk_buff **skb_trimmed)
+static int __ipv6_mc_check_mld(struct sk_buff *skb)
{
struct sk_buff *skb_chk = NULL;
@@ -160,16 +159,10 @@ static int __ipv6_mc_check_mld(struct sk_buff *skb,
if (ret)
goto err;
- if (skb_trimmed)
- *skb_trimmed = skb_chk;
- /* free now unneeded clone */
- else if (skb_chk != skb)
- kfree_skb(skb_chk);
-
ret = 0;
err:
- if (ret && skb_chk && skb_chk != skb)
+ if (skb_chk && skb_chk != skb)
kfree_skb(skb_chk);
return ret;
@@ -178,7 +171,6 @@ err:
/**
* ipv6_mc_check_mld - checks whether this is a sane MLD packet
* @skb: the skb to validate
- * @skb_trimmed: to store an skb pointer trimmed to IPv6 packet tail (optional)
*
* Checks whether an IPv6 packet is a valid MLD packet. If so sets
* skb transport header accordingly and returns zero.
@@ -188,18 +180,10 @@ err:
* -ENOMSG: IP header validation succeeded but it is not an MLD packet.
* -ENOMEM: A memory allocation failure happened.
*
- * Optionally, an skb pointer might be provided via skb_trimmed (or set it
- * to NULL): After parsing an MLD packet successfully it will point to
- * an skb which has its tail aligned to the IP packet end. This might
- * either be the originally provided skb or a trimmed, cloned version if
- * the skb frame had data beyond the IP packet. A cloned skb allows us
- * to leave the original skb and its full frame unchanged (which might be
- * desirable for layer 2 frame jugglers).
- *
* Caller needs to set the skb network header and free any returned skb if it
* differs from the provided skb.
*/
-int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed)
+int ipv6_mc_check_mld(struct sk_buff *skb)
{
int ret;
@@ -211,6 +195,6 @@ int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed)
if (ret < 0)
return ret;
- return __ipv6_mc_check_mld(skb, skb_trimmed);
+ return __ipv6_mc_check_mld(skb);
}
EXPORT_SYMBOL(ipv6_mc_check_mld);