sctp: make use of SCTP_TRUNC4 macro

And avoid the usage of '&~3'. This is the last place still not using
the macro.
Also break the line to make it easier to read.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 3 deletions

diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c
index 76eae828ec89..8afe2e90d003 100644
--- a/net/sctp/chunk.c
+++ b/net/sctp/chunk.c
@@ -195,9 +195,10 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc,
         /* This is the biggest possible DATA chunk that can fit into
          * the packet
          */
-        max_data = (asoc->pathmtu -
-                sctp_sk(asoc->base.sk)->pf->af->net_header_len -
-                sizeof(struct sctphdr) - sizeof(struct sctp_data_chunk)) & ~3;
+        max_data = asoc->pathmtu -
+                   sctp_sk(asoc->base.sk)->pf->af->net_header_len -
+                   sizeof(struct sctphdr) - sizeof(struct sctp_data_chunk);
+        max_data = SCTP_TRUNC4(max_data);
 
         max = asoc->frag_point;
         /* If the the peer requested that we authenticate DATA chunks