From: Chaitanya Kulkarni <chaitanyak@nvidia.com>
To: "linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>
Subject: Re: [PATCH] nvme-pci: add quirk for Memblaze Pblaze5 (0x1c5f:0x0555)
Date: Wed, 15 Apr 2026 17:53:25 +0000 [thread overview]
Message-ID: <ba517732-9f79-4db5-ad34-c648a49481ee@nvidia.com> (raw)
In-Reply-To: <1776274035-1604-1-git-send-email-tanroame.kyle@gmail.com>
On 4/15/26 10:27, Tao Jiang wrote:
> The Memblaze Pblaze5 NVMe device (PCI ID 0x1c5f:0x0555)
> is detected as a controller on recent kernels (tested on 5.15.85
> and 6.8.4), but no namespace is exposed.
>
> Tools like lsblk and fdisk do not report any block device.
>
> dmesg shows:
> nvme nvme0: missing or invalid SUBNQN field.
>
> The device works correctly on older kernels (e.g. 4.19), suggesting
> a compatibility issue with newer namespace handling.
>
> This indicates the device does not properly support the
> Namespace Descriptor List feature.
>
> Applying NVME_QUIRK_NO_NS_DESC_LIST allows the namespace to be
> discovered correctly.
>
> Signed-off-by: Tao Jiang<tanroame.kyle@gmail.com>
>
> ---
Looks good.
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
next prev parent reply other threads:[~2026-04-15 17:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-15 17:27 [PATCH] nvme-pci: add quirk for Memblaze Pblaze5 (0x1c5f:0x0555) Tao Jiang
2026-04-15 17:53 ` Chaitanya Kulkarni [this message]
2026-04-16 5:17 ` Christoph Hellwig
2026-04-16 22:11 ` Keith Busch
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