linux-kernel - Re: [PATCH] nvme: validate cntlid's only for nvme >= 1.1.0

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Date:   Tue, 30 Jun 2020 15:33:58 +0200
From:   Christoph Hellwig <hch@....de>
To:     Maximilian Heyne <mheyne@...zon.de>
Cc:     Amit Shah <aams@...zon.de>, stable@...r.kernel.org,
        Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nvme: validate cntlid's only for nvme >= 1.1.0

On Tue, Jun 30, 2020 at 12:29:23PM +0000, Maximilian Heyne wrote:
> Controller ID's (cntlid) for NVMe devices were introduced in version
> 1.1.0 of the specification. Controllers that follow the older 1.0.0 spec
> don't set this field so it doesn't make sense to validate it. On the
> contrary, when using SR-IOV this check breaks VFs as they are all part
> of the same NVMe subsystem.
> 
> Signed-off-by: Maximilian Heyne <mheyne@...zon.de>
> Cc: <stable@...r.kernel.org> # 5.4+

The first hunk looks ok, the second doesn't make sense as fabrics
was only added with NVMe 1.2.2.  I can fix it up when applying if you
are ok with that.

But you guys really shouldn't be doing SR-IOV with 1.0 controllers
independent of this..