From: Alex Vesker <valex@mellanox.com>
Date: Mon, 4 Nov 2019 11:59:21 +0200
Subject: net/mlx5: DR, Fix invalid EQ vector number on CQ creation
Patch-mainline: v5.4
Git-commit: 829969956f97e880dd01086be47747226e48a3f0
References: jsc#SLE-8464

When creating a CQ, the CPU id is used for the vector value.
This would fail in-case the CPU id was higher than the maximum
vector value.

Fixes: 297cccebdc5a ("net/mlx5: DR, Expose an internal API to issue RDMA operations")
Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c
@@ -700,6 +700,7 @@ static struct mlx5dr_cq *dr_create_cq(st
 	unsigned int irqn;
 	void *cqc, *in;
 	__be64 *pas;
+	int vector;
 	u32 i;
 
 	cq = kzalloc(sizeof(*cq), GFP_KERNEL);
@@ -728,7 +729,8 @@ static struct mlx5dr_cq *dr_create_cq(st
 	if (!in)
 		goto err_cqwq;
 
-	err = mlx5_vector2eqn(mdev, smp_processor_id(), &eqn, &irqn);
+	vector = smp_processor_id() % mlx5_comp_vectors_count(mdev);
+	err = mlx5_vector2eqn(mdev, vector, &eqn, &irqn);
 	if (err) {
 		kvfree(in);
 		goto err_cqwq;