linux-kernel - Re: [PATCH] nvme: update firmware version after commit

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Message-ID: <ZSlQobW4LOuJd018@kbusch-mbp>
Date:   Fri, 13 Oct 2023 08:13:53 -0600
From:   Keith Busch <kbusch@...nel.org>
To:     Niklas Cassel <Niklas.Cassel@....com>
Cc:     Daniel Wagner <dwagner@...e.de>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH] nvme: update firmware version after commit

On Fri, Oct 13, 2023 at 01:02:29PM +0000, Niklas Cassel wrote:
> 
> However, when upgrading firmware (even without a reset),
> can't more things other than FW version change?

New firmware can change all sorts of things, but I think firmware_rev is
the only exported sysfs attribute we expect to change. Other attributes,
like model, serial and unique id's, should be stable across these types
of firmware upgrades. I don't think "activation without reset" can be
used for firmware upgrades that change fundamental ways the device
operates.