Fix handling of wq->tail for send completions

Cast the increment added to wq->tail when send completions are
processed to uint16_t to avoid using wrong values caused by standard
integer promotions.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/cq.c b/src/cq.c
index c4a3ca4..a1831ff 100644
--- a/src/cq.c
+++ b/src/cq.c
@@ -238,7 +238,7 @@ static int mlx4_poll_one(struct mlx4_cq *cq,
 	if (is_send) {
 		wq = &(*cur_qp)->sq;
 		wqe_index = ntohs(cqe->wqe_index);
-		wq->tail += wqe_index - (uint16_t) wq->tail;
+		wq->tail += (uint16_t) (wqe_index - (uint16_t) wq->tail);
 		wc->wr_id = wq->wrid[wq->tail & (wq->max - 1)];
 		++wq->tail;
 	} else if ((*cur_qp)->ibv_qp.srq) {