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IB/mlx4: Fix incorrect cq flushing in error state

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When handling a device internal error, the driver is responsible to
drain the completion queue with flush errors.

In case a completion queue was assigned to multiple send queues, the
driver iterates over the send queues and generates flush errors of
inflight wqes. The driver must correctly pass the wc array with an
offset as a result of the previous send queue iteration. Not doing so
will overwrite previously set completions and return a wrong number
of polled completions which includes ones which were not correctly set.

Fixes: 35f05dabf9 (IB/mlx4: Reset flow support for IB kernel ULPs)
Signed-off-by: Ariel Nahum <arieln@mellanox.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Cc: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Ariel Nahum 2015-08-09 11:16:27 +03:00 committed by Doug Ledford
parent 5e99b139f1
commit 799cdaf8a9
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/mlx4/cq.c
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@ -638,7 +638,7 @@ static void mlx4_ib_poll_sw_comp(struct mlx4_ib_cq *cq, int num_entries,
* simulated FLUSH_ERR completions
*/
list_for_each_entry(qp, &cq->send_qp_list, cq_send_list) {
mlx4_ib_qp_sw_comp(qp, num_entries, wc, npolled, 1);
mlx4_ib_qp_sw_comp(qp, num_entries, wc + *npolled, npolled, 1);
if (*npolled >= num_entries)
goto out;
}