Re: [PATCH rdma-next] RDMA/mlx5: Refactor transport domain checks

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On Tue, Jun 19, 2018 at 10:39:06AM +0300, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@xxxxxxxxxxxx>
> 
> Put all relevant checks for transport domain in one place.
> 
> Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
>  drivers/infiniband/hw/mlx5/main.c | 22 ++++++++++++----------
>  1 file changed, 12 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
> index 97113957398d..0b7d547bb857 100644
> +++ b/drivers/infiniband/hw/mlx5/main.c
> @@ -1582,7 +1582,10 @@ static int deallocate_uars(struct mlx5_ib_dev *dev, struct mlx5_ib_ucontext *con
>  
>  static int mlx5_ib_alloc_transport_domain(struct mlx5_ib_dev *dev, u32 *tdn)
>  {
> -	int err;
> +	int err = 0;
> +
> +	if (!MLX5_CAP_GEN(dev->mdev, log_max_transport_domain))
> +		return err;
>  
>  	err = mlx5_core_alloc_transport_domain(dev->mdev, tdn);
>  	if (err)

I revised this to

	int err;

	if (!MLX5_CAP_GEN(dev->mdev, log_max_transport_domain))
		return 0;

Which is must clearer that no transport domains is not a failure than
relying on the err pre-initialization..

Otherwise, applied to for-next

Thanks,
Jason
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