From: Ariel Nahum Date: Sun, 9 Aug 2015 08:16:27 +0000 (+0300) Subject: IB/mlx4: Fix incorrect cq flushing in error state X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=799cdaf8a98f13d4fba3162e21e1e63f21045010;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git IB/mlx4: Fix incorrect cq flushing in error state 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: 35f05dabf95a (IB/mlx4: Reset flow support for IB kernel ULPs) Signed-off-by: Ariel Nahum Signed-off-by: Sagi Grimberg Cc: Yishai Hadas Signed-off-by: Doug Ledford --- diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c index 36eb3d012b6d..2f4259525bb1 100644 --- a/drivers/infiniband/hw/mlx4/cq.c +++ b/drivers/infiniband/hw/mlx4/cq.c @@ -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; }