[PATCH rdma-rc 3/4] IB/mlx5: When not in dual port RoCE mode, use provided port as native

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From: Mark Bloch <markb@xxxxxxxxxxxx>

The series that introduced dual port RoCE mode assumed that we don't have
a dual port HCA that use the mlx5 driver, this is not the case for
Connect-IB HCAs. This reasoning led to assigning 1 as the native port index
which causes issue when the second port is used.

For example query_pkey() when called on the second port will return values
of the first port. Make sure that we assign the right port index as the native
port index.

Fixes: 32f69e4be269 ("{net, IB}/mlx5: Manage port association for multiport RoCE")
Reviewed-by: Daniel Jurgens <danielj@xxxxxxxxxxxx>
Signed-off-by: Mark Bloch <markb@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
---
 drivers/infiniband/hw/mlx5/main.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 4236c8086820..899d58f5a485 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -245,12 +245,16 @@ struct mlx5_core_dev *mlx5_ib_get_native_port_mdev(struct mlx5_ib_dev *ibdev,
 	struct mlx5_ib_multiport_info *mpi;
 	struct mlx5_ib_port *port;
 
+	if (!mlx5_core_mp_enabled(ibdev->mdev) ||
+	    ll != IB_LINK_LAYER_ETHERNET) {
+		if (native_port_num)
+			*native_port_num = ib_port_num;
+		return ibdev->mdev;
+	}
+
 	if (native_port_num)
 		*native_port_num = 1;
 
-	if (!mlx5_core_mp_enabled(ibdev->mdev) || ll != IB_LINK_LAYER_ETHERNET)
-		return ibdev->mdev;
-
 	port = &ibdev->port[ib_port_num - 1];
 	if (!port)
 		return NULL;
-- 
2.16.2

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