Regression: Connect-X5 doesn't connect with NVME-of

[Max Gurtovoy]

Hi Sagi/Logan,

I've repro it with v4.14.1 (not happens on each connect).
Sagi's proposal below fix the issue of the "Failed to write to 
/dev/nvme-fabrics: Invalid cross-device link".

Sagi can you push (with my Tested-by: Max Gurtovoy <maxg at mellanox.com> 
and Reviewed-by: Max Gurtovoy <maxg at mellanox.com>) it or I will ?

The crush after the connection failure is fixed in my patches for NVMe 
core state machine fixes that are under review in the list.


> 
> So I think this should make the problem go away:
> -- 
> diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
> index a0610427e168..b82c4ae92411 100644
> --- a/include/linux/mlx5/driver.h
> +++ b/include/linux/mlx5/driver.h
> @@ -1238,7 +1238,7 @@ mlx5_get_vector_affinity(struct mlx5_core_dev 
> *dev, int vector)
>          int eqn;
>          int err;
> 
> -       err = mlx5_vector2eqn(dev, vector, &eqn, &irq);
> +       err = mlx5_vector2eqn(dev, MLX5_EQ_VEC_COMP_BASE + vector, &eqn, 
> &irq);
>          if (err)
>                  return NULL;
> -- 
>