sctp: remove the useless check in sctp_renege_events

Remove the 'if (chunk)' check in sctp_renege_events for idata process,
as all renege commands are generated in sctp_eat_data and it can't be
NULL.

The same thing we already did for common data in sctp_ulpq_renege.

Fixes: 94014e8d871a ("sctp: implement renege_events for sctp_stream_interleave")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sctp/stream_interleave.c b/net/sctp/stream_interleave.c
index 8c7cf8f..86c26ec 100644 (file)
--- a/net/sctp/stream_interleave.c
+++ b/net/sctp/stream_interleave.c
@@ -954,12 +954,8 @@ static void sctp_renege_events(struct sctp_ulpq *ulpq, struct sctp_chunk *chunk,
        __u32 freed = 0;
        __u16 needed;
 
-       if (chunk) {
-               needed = ntohs(chunk->chunk_hdr->length);
-               needed -= sizeof(struct sctp_idata_chunk);
-       } else {
-               needed = SCTP_DEFAULT_MAXWINDOW;
-       }
+       needed = ntohs(chunk->chunk_hdr->length) -
+                sizeof(struct sctp_idata_chunk);
 
        if (skb_queue_empty(&asoc->base.sk->sk_receive_queue)) {
                freed = sctp_ulpq_renege_list(ulpq, &ulpq->lobby, needed);