From 6a85820d32b8f908e2dd41b75977fb77768118c2 Mon Sep 17 00:00:00 2001 From: Ariel Nahum Date: Sun, 9 Aug 2015 11:16:27 +0300 Subject: IB/mlx4: Fix incorrect cq flushing in error state commit 799cdaf8a98f13d4fba3162e21e1e63f21045010 upstream. 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 Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/hw/mlx4/cq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c index 0176caa5792c..2857ed89725e 100644 --- a/drivers/infiniband/hw/mlx4/cq.c +++ b/drivers/infiniband/hw/mlx4/cq.c @@ -629,7 +629,7 @@ 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; } -- cgit v1.2.3