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IB/mlx4: Set ownership bit correctly when copying CQEs during CQ resize 

When resizing a CQ, when copying over unpolled CQEs from the old CQE
buffer to the new buffer, the ownership bit must be set appropriately
for the new buffer, or the ownership bit in the new buffer gets
corrupted.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Jack Morgenstein 2008-12-24 20:32:42 -08:00 committed by Roland Dreier
parent f5eda57f9b
commit 7798dbf40a
1 changed files with 6 additions and 4 deletions
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10
drivers/infiniband/hw/mlx4/cq.c
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@ -325,15 +325,17 @@ static int mlx4_ib_get_outstanding_cqes(struct mlx4_ib_cq *cq)
static void mlx4_ib_cq_resize_copy_cqes(struct mlx4_ib_cq *cq)
{
struct mlx4_cqe *cqe;
struct mlx4_cqe *cqe, *new_cqe;
int i;
i = cq->mcq.cons_index;
cqe = get_cqe(cq, i & cq->ibcq.cqe);
while ((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) != MLX4_CQE_OPCODE_RESIZE) {
memcpy(get_cqe_from_buf(&cq->resize_buf->buf,
(i + 1) & cq->resize_buf->cqe),
get_cqe(cq, i & cq->ibcq.cqe), sizeof(struct mlx4_cqe));
new_cqe = get_cqe_from_buf(&cq->resize_buf->buf,
(i + 1) & cq->resize_buf->cqe);
memcpy(new_cqe, get_cqe(cq, i & cq->ibcq.cqe), sizeof(struct mlx4_cqe));
new_cqe->owner_sr_opcode = (cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK) |
(((i + 1) & (cq->resize_buf->cqe + 1)) ? MLX4_CQE_OWNER_MASK : 0);
cqe = get_cqe(cq, ++i & cq->ibcq.cqe);
}
++cq->mcq.cons_index;