sctp: out_qlen should be updated when pruning unsent queue

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

1 files changed, 5 insertions, 6 deletions

diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index db352e5d61f8..025ccff67072 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.  */