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Date: Thu, 6 Mar 2025 15:18:37 +0100
From: Christoph Hellwig <hch@lst.de>
To: Hannes Reinecke <hare@suse.de>
Cc: Christoph Hellwig <hch@lst.de>, Keith Busch <kbusch@kernel.org>,
	Sagi Grimberg <sagi@grimberg.me>,
	Nilay Shroff <nilay@linux.ibm.com>,
	John Meneghini <jmeneghi@redhat.com>, bmarzins@redhat.com,
	Bryan Gurney <bgurney@redhat.com>, linux-nvme@lists.infradead.org,
	linux-kernel@vger.kernel.org, Marco Patalano <mpatalan@redhat.com>,
	axboe@kernel.dk
Subject: Re: [PATCH] nvme: remove multipath module parameter
Message-ID: <20250306141837.GA21353@lst.de>
References: <2ff87386-c6db-4f2e-be91-213504d99a78@linux.ibm.com> <0656b66c-dd9c-495d-b1fc-4f09e763fa66@grimberg.me> <Z7dct_AbaSO7uZ2h@kbusch-mbp> <91ae613a-7b56-4ca0-b91c-6bc1eee798b8@suse.de> <20250305141554.GA18065@lst.de> <Z8hrJ5JVqi7TgFCn@kbusch-mbp> <20250305235119.GB896@lst.de> <Z8jk-D3EjEdyBIU5@kbusch-mbp> <20250306000348.GA1233@lst.de> <1ffebf60-5672-4cd0-bb5a-934376c16694@suse.de>
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On Thu, Mar 06, 2025 at 08:12:03AM +0100, Hannes Reinecke wrote:
> Single ported.
> There is a range of Samsung NVMe where one is a normal, single ported,
> NVMe, and one with a nearly identical model number reporting CMIC.
>
> Causing _quite_ a lot of confusion with the customer (and L3) when
> used under MD, as for the first hotplug works, for the second ... not so 
> much.

If the device is indeed entirely single ported and Samsung can confirm
the setting is incorret and not easily fixable by a firmware update
we can quirk it.