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Wed, 15 Apr 2026 10:30:19 -0700 (PDT) Received: from localhost.localdomain.localdomain ([23.226.227.22]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82f7166a837sm1000751b3a.40.2026.04.15.10.30.16 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 15 Apr 2026 10:30:18 -0700 (PDT) From: Tao Jiang To: linux-nvme@lists.infradead.org Cc: kbusch@kernel.org, axboe@kernel.dk, hch@lst.de, sagi@grimberg.me, linux-kernel@vger.kernel.org, tanroame.kyle@gmail.com Subject: [PATCH] nvme-pci: add quirk for Memblaze Pblaze5 (0x1c5f:0x0555) Date: Thu, 16 Apr 2026 01:27:15 +0800 Message-Id: <1776274035-1604-1-git-send-email-tanroame.kyle@gmail.com> X-Mailer: git-send-email 1.8.3.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260415_103021_406375_53DDA910 X-CRM114-Status: GOOD ( 12.41 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org 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 --- drivers/nvme/host/pci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index db5fc9b..0f747ac 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -4104,6 +4104,8 @@ static void nvme_error_resume(struct pci_dev *pdev) .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, { PCI_DEVICE(0x1c5f, 0x0540), /* Memblaze Pblaze4 adapter */ .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, + { PCI_DEVICE(0x1c5f, 0x0555), /* Memblaze Pblaze5 adapter */ + .driver_data = NVME_QUIRK_NO_NS_DESC_LIST, }, { PCI_DEVICE(0x144d, 0xa821), /* Samsung PM1725 */ .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, { PCI_DEVICE(0x144d, 0xa822), /* Samsung PM1725a */ -- 1.8.3.1