Use mptcp_get_ext() helper defined in protocol.h instead of open-coding
it in mptcp_sendmsg_frag().

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 net/mptcp/protocol.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 6dd1ceaee257..f11834d924ff 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1267,7 +1267,7 @@ static int mptcp_sendmsg_frag(struct sock *sk, struct sock *ssk,
 		 * queue management operation, to avoid breaking the ext <->
 		 * SSN association set here
 		 */
-		mpext = skb_ext_find(skb, SKB_EXT_MPTCP);
+		mpext = mptcp_get_ext(skb);
 		if (!mptcp_skb_can_collapse_to(data_seq, skb, mpext)) {
 			TCP_SKB_CB(skb)->eor = 1;
 			goto alloc_skb;
@@ -1289,7 +1289,7 @@ static int mptcp_sendmsg_frag(struct sock *sk, struct sock *ssk,
 
 		i = skb_shinfo(skb)->nr_frags;
 		reuse_skb = false;
-		mpext = skb_ext_find(skb, SKB_EXT_MPTCP);
+		mpext = mptcp_get_ext(skb);
 	}
 
 	/* Zero window and all data acked? Probe. */
-- 
2.35.3