Re: [PATCH] IB/iopib: Report SG feature regardless of HW UD CSUM capability

[Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

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On Sun, Jul 17, 2016 at 04:08:48AM -0700, Yuval Shaia wrote:
> Decouple SG support from HW ability to do UD checksum.
> This coupling is for historical reasons and removed with commit
> ec5f06156423 ("net: Kill link between CSUM and SG features.")
> 
> Signed-off-by: Yuval Shaia <yuval.shaia-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
> ---
>  drivers/infiniband/ulp/ipoib/ipoib_main.c |    5 +++--
>  1 files changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
> index 5f58c41..119790c 100644
> --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
> +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
> @@ -1967,8 +1967,7 @@ int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca)
>  	priv->hca_caps = hca->attrs.device_cap_flags;
>  
>  	if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
> -		priv->dev->hw_features = NETIF_F_SG |
> -			NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
> +		priv->dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
>  
>  		if (priv->hca_caps & IB_DEVICE_UD_TSO)
>  			priv->dev->hw_features |= NETIF_F_TSO;
> @@ -1976,6 +1975,8 @@ int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca)
>  		priv->dev->features |= priv->dev->hw_features;
>  	}
>  
> +	priv->dev->features |= NETIF_F_SG;
> +

I don't know about it for sure, but maybe the more appropriate place
to place it will be in ipoib_setup() function?

1764         dev->features            = (NETIF_F_VLAN_CHALLENGED     |
1765                                     NETIF_F_HIGHDMA);

What do you think?

>  	return 0;
>  }
>  
> -- 
> 1.7.1
> 
> --
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