[dpdk-dev] Please revert: [PATCH 2/2] net/mlx4: fix useless default in RSS converter

[Ophir Munk <ophirmu@mellanox.com>]

Hi Shahaf, Adrien,

This commit (in next-net/master since 8-May-18) is breaking all testpmd calls with mlx4 NIC, see [1].
Can you please revert it?

[1]
PMD: net_mlx4: cannot set up internal flow rules (code 95, "Operation not supported"), flow error type 16, cause 0x7fffdb5bb3a0, message: unsupported RSS hash type requested
Fail to configure port 0
EAL: Error - exiting with code: 1
  Cause: Start ports failed

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Adrien Mazarguil
> Sent: Friday, May 04, 2018 6:18 PM
> To: Shahaf Shuler <shahafs@mellanox.com>
> Cc: Ferruh Yigit <ferruh.yigit@intel.com>; dev@dpdk.org; stable@dpdk.org
> Subject: [dpdk-dev] [PATCH 2/2] net/mlx4: fix useless default in RSS
> converter
> 
> Since the commit below, mlx4_conv_rss_types() does not need to support
> special value -1 anymore. Other functions rely on priv->hw_rss_sup directly.
> 
> Fixes: 1d173da83ef2 ("net/mlx4: fix default RSS hash fields")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
> ---
>  drivers/net/mlx4/mlx4_flow.c | 5 -----
>  1 file changed, 5 deletions(-)
> 
> diff --git a/drivers/net/mlx4/mlx4_flow.c b/drivers/net/mlx4/mlx4_flow.c
> index 3f754b480..cb3b9a952 100644
> --- a/drivers/net/mlx4/mlx4_flow.c
> +++ b/drivers/net/mlx4/mlx4_flow.c
> @@ -78,9 +78,6 @@ struct mlx4_drop {
>  /**
>   * Convert DPDK RSS hash types to their Verbs equivalent.
>   *
> - * This function returns the supported (default) set when @p types has
> - * special value (uint64_t)-1.
> - *
>   * @param priv
>   *   Pointer to private structure.
>   * @param types
> @@ -125,8 +122,6 @@ mlx4_conv_rss_types(struct priv *priv, uint64_t
> types)
>  	uint64_t conv = 0;
>  	unsigned int i;
> 
> -	if (types == (uint64_t)-1)
> -		return priv->hw_rss_sup;
>  	for (i = 0; i != RTE_DIM(in); ++i)
>  		if (types & in[i]) {
>  			seen |= types & in[i];
> --
> 2.11.0