Re: [PATCH] nvme-pci: add quirk for Memblaze Pblaze5 (0x1c5f:0x0555)

[Keith Busch]

On Thu, Apr 16, 2026 at 01:27:15AM +0800, 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.

Thanks, applied to nvme-7.1.