[PATCH net] sctp: remove the useless check in sctp_renege_events

[Xin Long]

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....@gmail.com>
---
 net/sctp/stream_interleave.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/net/sctp/stream_interleave.c b/net/sctp/stream_interleave.c
index c19fd42..65ac03b 100644
--- a/net/sctp/stream_interleave.c
+++ b/net/sctp/stream_interleave.c
@@ -955,12 +955,8 @@ 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);
-- 
2.1.0