[PATCH net] sctp: out_qlen should be updated when pruning unsent queue

[Xin Long]

This patch is to fix the issue that sctp_prsctp_prune_sent forgot
to update q->out_qlen when removing a chunk from unsent queue.

Fixes: 8dbdf1f5b09c ("sctp: implement prsctp PRIO policy")
Signed-off-by: Xin Long <lucien....@gmail.com>
---
 net/sctp/outqueue.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index db352e5..025ccff 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -382,17 +382,18 @@ static int sctp_prsctp_prune_sent(struct sctp_association 
*asoc,
 }
 
 static int sctp_prsctp_prune_unsent(struct sctp_association *asoc,
-                                   struct sctp_sndrcvinfo *sinfo,
-                                   struct list_head *queue, int msg_len)
+                                   struct sctp_sndrcvinfo *sinfo, int msg_len)
 {
+       struct sctp_outq *q = &asoc->outqueue;
        struct sctp_chunk *chk, *temp;
 
-       list_for_each_entry_safe(chk, temp, queue, list) {
+       list_for_each_entry_safe(chk, temp, &q->out_chunk_list, list) {
                if (!SCTP_PR_PRIO_ENABLED(chk->sinfo.sinfo_flags) ||
                    chk->sinfo.sinfo_timetolive <= sinfo->sinfo_timetolive)
                        continue;
 
                list_del_init(&chk->list);
+               q->out_qlen -= chk->skb->len;
                asoc->sent_cnt_removable--;
                asoc->abandoned_unsent[SCTP_PR_INDEX(PRIO)]++;
 
@@ -431,9 +432,7 @@ void sctp_prsctp_prune(struct sctp_association *asoc,
                        return;
        }
 
-       sctp_prsctp_prune_unsent(asoc, sinfo,
-                                &asoc->outqueue.out_chunk_list,
-                                msg_len);
+       sctp_prsctp_prune_unsent(asoc, sinfo, msg_len);
 }
 
 /* Mark all the eligible packets on a transport for retransmission.  */
-- 
2.1.0