[ewg] Re: [PATCH] rdma_cm: Use rate from ipoib broadcast when joining ipoib multicast

[Vladimir Sokolovsky]

Yossi Etigin wrote:
>   When joining IPoIB multicast group, use the same rate as in the 
> broadcast
> group. Otherwise, if rdma_cm creates this group before IPoIB does, it 
> might get
> a different rate. This will cause IPoIB to fail joining to the same 
> group later
> on, because IPoIB has a strict rate selection.
>
> Signed-off-by: Yossi Etigin <yosefe at voltaire.com>
>
> ---
>
> Vlad, this was accepted by Roland, please add it to OFED as well.
>
> Index: b/drivers/infiniband/core/cma.c
> ===================================================================
> --- a/drivers/infiniband/core/cma.c    2009-03-30 19:53:19.000000000 
> +0300
> +++ b/drivers/infiniband/core/cma.c    2009-03-30 21:38:02.000000000 
> +0300
> @@ -2726,6 +2726,10 @@ static int cma_join_ib_multicast(struct
>              IB_SA_MCMEMBER_REC_FLOW_LABEL |
>              IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
>
> +    if (id_priv->id.ps == RDMA_PS_IPOIB)
> +        comp_mask |= IB_SA_MCMEMBER_REC_RATE |
> +                 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
> +
>      mc->multicast.ib = ib_sa_join_multicast(&sa_client, 
> id_priv->id.device,
>                          id_priv->id.port_num, &rec,
>                          comp_mask, GFP_KERNEL,

Applied,

Regards,
Vladimir