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Date:   Sat, 20 Feb 2021 13:06:00 -0600
From:   Bjorn Helgaas <helgaas@kernel.org>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     Leon Romanovsky <leon@kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Saeed Mahameed <saeedm@nvidia.com>,
        Jason Gunthorpe <jgg@nvidia.com>,
        Alexander Duyck <alexander.duyck@gmail.com>,
        Jakub Kicinski <kuba@kernel.org>, linux-pci@vger.kernel.org,
        linux-rdma@vger.kernel.org, netdev@vger.kernel.org,
        Don Dutile <ddutile@redhat.com>,
        Alex Williamson <alex.williamson@redhat.com>,
        "David S . Miller" <davem@davemloft.net>,
        Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= <kw@linux.com>
Subject: Re: [PATCH mlx5-next v6 1/4] PCI: Add sysfs callback to allow MSI-X
 table size change of SR-IOV VFs
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On Fri, Feb 19, 2021 at 09:20:18AM +0100, Greg Kroah-Hartman wrote:

> Ok, can you step back and try to explain what problem you are trying to
> solve first, before getting bogged down in odd details?  I find it
> highly unlikely that this is something "unique", but I could be wrong as
> I do not understand what you are wanting to do here at all.

We want to add two new sysfs files:

  sriov_vf_total_msix, for PF devices
  sriov_vf_msix_count, for VF devices associated with the PF

AFAICT it is *acceptable* if they are both present always.  But it
would be *ideal* if they were only present when a driver that
implements the ->sriov_get_vf_total_msix() callback is bound to the
PF.