net: use skb_is_gso_sctp() instead of open-coding

As well as the basic conversion, I noticed that a lot of the
SCTP code checks gso_type without first checking skb_is_gso()
so I have added that where appropriate.

Also, document the helper.

Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/sctp/inqueue.c b/net/sctp/inqueue.c
index 48392552ee7c..23ebc5318edc 100644
--- a/net/sctp/inqueue.c
+++ b/net/sctp/inqueue.c
@@ -170,7 +170,7 @@ next_chunk:
 
                 chunk = list_entry(entry, struct sctp_chunk, list);
 
-                if ((skb_shinfo(chunk->skb)->gso_type & SKB_GSO_SCTP) == SKB_GSO_SCTP) {
+                if (skb_is_gso(chunk->skb) && skb_is_gso_sctp(chunk->skb)) {
                         /* GSO-marked skbs but without frags, handle
                          * them normally
                          */