IB/mlx5: Avoid async events on invalid port number

On a single ported Connect-IB, its possible for the firmware to issue
events on the non-existing 2nd port.  Make sure to ignore events
generated for such ports.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 3f831de..e59761e 100644 (file)
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1006,6 +1006,11 @@ static void mlx5_ib_event(struct mlx5_core_dev *dev, enum mlx5_dev_event event,
        ibev.device           = &ibdev->ib_dev;
        ibev.element.port_num = port;
 
+       if (port < 1 || port > ibdev->num_ports) {
+               mlx5_ib_warn(ibdev, "warning: event on port %d\n", port);
+               return;
+       }
+
        if (ibdev->ib_active)
                ib_dispatch_event(&ibev);
 }