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Message-ID: <1520932456.11412.6.camel@infradead.org>
Subject: Re: [pci PATCH v5 3/4] ena: Migrate over to unmanaged SR-IOV
 support
From:   David Woodhouse <dwmw2@infradead.org>
To:     Christoph Hellwig <hch@lst.de>
Cc:     Alexander Duyck <alexander.duyck@gmail.com>, bhelgaas@google.com,
        alexander.h.duyck@intel.com, linux-pci@vger.kernel.org,
        virtio-dev@lists.oasis-open.org, kvm@vger.kernel.org,
        netdev@vger.kernel.org, dan.daly@intel.com,
        linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org,
        keith.busch@intel.com, netanel@amazon.com, mheyne@amazon.de,
        liang-min.wang@intel.com, mark.d.rustad@intel.com
In-Reply-To: <20180313085442.GA1537@lst.de>
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Date:   Tue, 13 Mar 2018 09:14:16 +0000
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Sender: linux-kernel-owner@vger.kernel.org
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On Tue, 2018-03-13 at 09:54 +0100, Christoph Hellwig wrote:
> On Tue, Mar 13, 2018 at 08:45:19AM +0000, David Woodhouse wrote:
> Because binding to pci-stub means that you'd now enable the simple
> SR-IOV for any device bound to PCI stub.=C2=A0=C2=A0Which often might be =
the wrong
> thing.

No, *using* it would be the wrong thing (bad root; no biscuit).

Except when the PF doesn't have SR-IOV capability anyway, in which case
who cares.

Or when the PF does have SR-IOV capability and root has ensure that
she's doing the right thing.

I understand the arguments about disallowing root from doing bad
things. Not that I agree with them. But simply changing to a
*different* driver seems pointless.


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