linux-kernel - Re: [PATCH] nvme-pci: Add NVME_QUIRK_IDENTIFY

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Date:   Wed, 4 Jan 2023 23:03:00 +1100
From:   Orlando Chamberlain <orlandoch.dev@...il.com>
To:     marcan@...can.st
Cc:     asahi@...ts.linux.dev, axboe@...com, hch@....de, kbusch@...nel.org,
        linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org,
        sagi@...mberg.me, sven@...npeter.dev, ushankar@...estorage.com
Subject: Re: [PATCH] nvme-pci: Add NVME_QUIRK_IDENTIFY_CNS quirk to Apple T2
 controllers

> This mirrors the quirk added to Apple Silicon controllers in apple.c.
> These controllers do not support the Active NS ID List command and
> behave identically to the SoC version judging by existing user
> reports/syslogs, so will need the same fix. This quirk reverts
> back to NVMe 1.0 behavior and disables the broken commands.
>
> Fixes: 811f4de0344d ("nvme: avoid fallback to sequential scan due to transient issues")
> Signed-off-by: Hector Martin <marcan@...can.st>

On T2 macbookpro16,1 with 6.2.0-rc3-00010-g69b41ac87e4a I had this in
dmesg:

nvme nvme0: 1/0/0 default/read/poll queues
nvme nvme0: Identify NS List failed (status=0xb)

And in /dev only nvme0 existed (no nvme0n1*).

This patch fixed that and /dev/nvme0n1p* existed.

Tested-by: Orlando Chamberlain <orlandoch.dev@...il.com>