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IB/srp: Use ib_drain_rq() 

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Steve Wise 2016-02-17 08:15:42 -08:00 committed by Doug Ledford
parent 086dc6e359
commit 561392d42d
1 changed files with 4 additions and 36 deletions
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40
drivers/infiniband/ulp/srp/ib_srp.c
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@ -446,49 +446,17 @@ static struct srp_fr_pool *srp_alloc_fr_pool(struct srp_target_port *target)
dev->max_pages_per_mr);
}
static void srp_drain_done(struct ib_cq *cq, struct ib_wc *wc)
{
struct srp_rdma_ch *ch = cq->cq_context;
complete(&ch->done);
}
static struct ib_cqe srp_drain_cqe = {
.done = srp_drain_done,
};
/**
* srp_destroy_qp() - destroy an RDMA queue pair
* @ch: SRP RDMA channel.
*
* Change a queue pair into the error state and wait until all receive
* completions have been processed before destroying it. This avoids that
* the receive completion handler can access the queue pair while it is
* Drain the qp before destroying it. This avoids that the receive
* completion handler can access the queue pair while it is
* being destroyed.
*/
static void srp_destroy_qp(struct srp_rdma_ch *ch)
{
static struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
static struct ib_recv_wr wr = { 0 };
struct ib_recv_wr *bad_wr;
int ret;
wr.wr_cqe = &srp_drain_cqe;
/* Destroying a QP and reusing ch->done is only safe if not connected */
WARN_ON_ONCE(ch->connected);
ret = ib_modify_qp(ch->qp, &attr, IB_QP_STATE);
WARN_ONCE(ret, "ib_cm_init_qp_attr() returned %d\n", ret);
if (ret)
goto out;
init_completion(&ch->done);
ret = ib_post_recv(ch->qp, &wr, &bad_wr);
WARN_ONCE(ret, "ib_post_recv() returned %d\n", ret);
if (ret == 0)
wait_for_completion(&ch->done);
out:
ib_drain_rq(ch->qp);
ib_destroy_qp(ch->qp);
}
@ -508,7 +476,7 @@ static int srp_create_ch_ib(struct srp_rdma_ch *ch)
if (!init_attr)
return -ENOMEM;
/* queue_size + 1 for ib_drain_qp */
/* queue_size + 1 for ib_drain_rq() */
recv_cq = ib_alloc_cq(dev->dev, ch, target->queue_size + 1,
ch->comp_vector, IB_POLL_SOFTIRQ);
if (IS_ERR(recv_cq)) {