Re: [PATCH rdma-rc] IB/mlx4: Fix MAD tunneling when SRIOV is enabled

[Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

On Sun, 2017-05-21 at 19:11 +0300, Leon Romanovsky wrote:
> The cited patch added a type field to structures ib_ah and
> rdma_ah_attr.
> 
> Function mlx4_ib_query_ah() builds an rdma_ah_attr structure from the
> data in an mlx4_ib_ah structure (which contains both an ib_ah
> structure
> and an address vector).
> 
> For mlx4_ib_query_ah() to work properly, the type field in the
> contained
> ib_ah structure must be set correctly.
> 
> In the outgoing MAD tunneling flow, procedure mlx4_ib_multiplex_mad()
> paravirtualizes a MAD received from a slave and sends the processed
> mad out over the wire. During this processing, it populates an
> mlx4_ib_ah structure and calls mlx4_ib_query_ah().
> 
> The cited commit overlooked setting the type field in the contained
> ib_ah structure before invoking mlx4_ib_query_ah(). As a result, the
> type field remained uninitialized, and the rdma_ah_attr structure was
> incorrectly built. This resulted in improperly built MADs being sent
> out
> over the wire.
> 
> This patch properly initializes the type field in the contained ib_ah
> structure before calling mlx4_ib_query_ah(). The rdma_ah_attr
> structure
> is then generated correctly.
> 
> Fixes: 44c58487d51a ("IB/core: Define 'ib' and 'roce' rdma_ah_attr
> types")
> Signed-off-by: Jack Morgenstein <jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
> Signed-off-by: Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

Thanks, applied.

-- 
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
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