IB/mlx4: Lock SQ lock in mlx4_ib_post_send()

Because of a typo, mlx4_ib_post_send() takes the same lock rq.lock as
mlx4_ib_post_recv().  Correct the code so the intended sq.lock is
taken when posting a send.

Noticed by Yossi Leybovitch and pointed out by Jack Morgenstein from
Mellanox.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 6b3322486b5e..8cba9c532e64 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -1282,7 +1282,7 @@ int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
         int size;
         int i;
 
-        spin_lock_irqsave(&qp->rq.lock, flags);
+        spin_lock_irqsave(&qp->sq.lock, flags);
 
         ind = qp->sq.head;
 
@@ -1448,7 +1448,7 @@ out:
                                (qp->sq.wqe_cnt - 1));
         }
 
-        spin_unlock_irqrestore(&qp->rq.lock, flags);
+        spin_unlock_irqrestore(&qp->sq.lock, flags);
 
         return err;
 }