linux-kernel - [PATCH 3.16 077/136] IB/mlx5: Assign send CQ and recv CQ of UMR QP

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Message-ID: <lsq.1518323471.753721851@decadent.org.uk>
Date:   Sun, 11 Feb 2018 04:31:11 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Yishai Hadas" <yishaih@...lanox.com>,
        "Doug Ledford" <dledford@...hat.com>,
        "Majd Dibbiny" <majd@...lanox.com>,
        "Leon Romanovsky" <leon@...nel.org>
Subject: [PATCH 3.16 077/136] IB/mlx5: Assign send CQ and recv CQ of UMR QP

3.16.54-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Majd Dibbiny <majd@...lanox.com>

commit 31fde034a8bd964a5c7c1a5663fc87a913158db2 upstream.

The UMR's QP is created by calling mlx5_ib_create_qp directly, and
therefore the send CQ and the recv CQ on the ibqp weren't assigned.

Assign them right after calling the mlx5_ib_create_qp to assure
that any access to those pointers will work as expected and won't
crash the system as might happen as part of reset flow.

Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters")
Signed-off-by: Majd Dibbiny <majd@...lanox.com>
Reviewed-by: Yishai Hadas <yishaih@...lanox.com>
Signed-off-by: Leon Romanovsky <leon@...nel.org>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/infiniband/hw/mlx5/main.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1164,6 +1164,8 @@ static int create_umr_res(struct mlx5_ib
 	qp->real_qp    = qp;
 	qp->uobject    = NULL;
 	qp->qp_type    = MLX5_IB_QPT_REG_UMR;
+	qp->send_cq    = init_attr->send_cq;
+	qp->recv_cq    = init_attr->recv_cq;
 
 	attr->qp_state = IB_QPS_INIT;
 	attr->port_num = 1;