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IB/mlx4: Fix handling of wq->tail for send completions

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Cast the increment added to wq->tail when send completions are
processed to u16 to avoid using wrong values caused by standard
integer promotions.

The same bug was fixed in libmlx4 by Eli Cohen <eli@mellanox.co.il>.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier 2007-06-12 10:50:42 -07:00
parent 99f9f3d49c
commit 614c3c85b5
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/mlx4/cq.c
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@ -354,7 +354,7 @@ static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
if (is_send) {
wq = &(*cur_qp)->sq;
wqe_ctr = be16_to_cpu(cqe->wqe_index);
wq->tail += wqe_ctr - (u16) wq->tail;
wq->tail += (u16) (wqe_ctr - (u16) wq->tail);
wc->wr_id = wq->wrid[wq->tail & (wq->max - 1)];
++wq->tail;
} else if ((*cur_qp)->ibqp.srq) {