[IPSEC]: Add async resume support on input

This patch adds support for async resumptions on input.  To do so, the
transform would return -EINPROGRESS and subsequently invoke the
function xfrm_input_resume to resume processing.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c
index 662d1e86cfbf..d5890c84a492 100644
--- a/net/ipv4/xfrm4_input.c
+++ b/net/ipv4/xfrm4_input.c
@@ -59,6 +59,9 @@ int xfrm4_transport_finish(struct sk_buff *skb, int async)
                 xfrm4_rcv_encap_finish);
         return 0;
 #else
+        if (async)
+                return xfrm4_rcv_encap_finish(skb);
+
         return -iph->protocol;
 #endif
 }