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Date:   Tue, 11 Jul 2023 15:14:54 +0300
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Subject: Re: Fwd: Need NVME QUIRK BOGUS for SAMSUNG MZ1WV480HCGL-000MV
 (Samsung SM-953 Datacenter SSD)
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To:     Christoph Hellwig <hch@lst.de>,
        Linux regressions mailing list <regressions@lists.linux.dev>
Cc:     Pankaj Raghav <p.raghav@samsung.com>,
        Keith Busch <kbusch@kernel.org>,
        Bagas Sanjaya <bagasdotme@gmail.com>,
        Jens Axboe <axboe@kernel.dk>,
        "Clemens S." <cspringsguth@gmail.com>,
        Martin Belanger <martin.belanger@dell.com>,
        Chaitanya Kulkarni <kch@nvidia.com>,
        John Meneghini <jmeneghi@redhat.com>,
        Hannes Reinecke <hare@suse.de>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux NVMe <linux-nvme@lists.infradead.org>,
        Kanchan Joshi <joshi.k@samsung.com>,
        Javier Gonzalez <javier.gonz@samsung.com>,
        =?UTF-8?B?67CV7KeE7ZmY?= <jh.i.park@samsung.com>,
        Linus Torvalds <torvalds@linux-foundation.org>
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 <CGME20230710155902eucas1p2b464a29adc35e983c73b00d18ab5344c@eucas1p2.samsung.com>
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 <462e0e1e-98ea-0f3c-4aaa-8d44f0a8e664@leemhuis.info>
 <20230711120609.GB27050@lst.de>
From:   Sagi Grimberg <sagi@grimberg.me>
In-Reply-To: <20230711120609.GB27050@lst.de>
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>> Well, that "They keep pumping out more and more devices with the same
>> breakage" and the "new device" comment from Pankaj below bear the
>> question: should we stop trying to play "whack a mole" with all those
>> quirk entries and handle devices with duplicate ids just like Windows does?
> 
> As far as I can tell Windows completely ignores the IDs.  Which, looking
> back, I'd love to be able to do as well, but they are already used
> by udev for the /dev/disk/by-id/ links.   Those are usually not used
> on desktop systems, as they use the file system labels and UUIDs, but
> that doesn't work for non-file system uses.
> 
> And all this has been working really well with the good old enterprise
> SSDs, it's just that the cheap consumer devices keep fucking it up.
> 
> If we'd take it away now we'd break existing users, which puts us between
> a rock and a hard place.

Maybe the compromise would be to add a modparam that tells the driver
to ignore it altogether (like allow_bogus_identifiers) that would
default to false. Then people can just workaround the problem instead
of having the back-and-fourth with the vendor?