From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7E368F8DFD1 for ; Thu, 16 Apr 2026 22:12:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=9Um4z0XWbc3Rs+JcXSSpN9m891lEXqVxJ/MK7OHpqgQ=; b=3XI+VnQYmE7tYFWNTIg0wbsLuh y1fJLnnZzVKfxsTSvMNx5teV5mOWrc5W1QwUrvECxEdcRVhs0/SsHOYuGwVFLK8VmrlsPceDvpE10 m6kHpXVBiccGE3l8Kc6rAU/lErcmaHiNq8IibYWTFoPEoZ79mG2lOxzggHqyVSmCD5mY5PcPZYNRu my4qPuDz5RQTYeZJDQil8cOeUXc9YDw+kcPg9MbN0fWY4vg9lq6bK/2bV3QoweDFYzrhFvUVkynKz Lmmpc9l0hBJs3d7ihM+PCYC5yzqlLTylhaE+0Okztia6VxCSuMLbXGuOXKMzMdnriAf0Wp+cNB5JL nRJ6e7tQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wDUwH-000000037sz-2aAw; Thu, 16 Apr 2026 22:11:57 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wDUwG-000000037sq-2BKW for linux-nvme@lists.infradead.org; Thu, 16 Apr 2026 22:11:56 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id E43C560128; Thu, 16 Apr 2026 22:11:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 52D34C2BCAF; Thu, 16 Apr 2026 22:11:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776377515; bh=KyWB9ycvHqkmpmposSJtxAzlyFaOpjGf/DPS/R71W6Q=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=tyYDlTI/ahHVBH3cT7RBDmQOh+9tB6lR0gXv+8TBxYY7XSwlOiQHSrHVQK1SPNVZu lAdeOs+E5UoWhY144hpS8F9EkppzizxZrPercOtC/+QJXJ1QIysGZGMFKX4ypbSUHF PqC1RivU/0e2zTQ5RhMLHjfcoDxn/C+xx46ASWS+7e0iRu4mQPujnlMQR5dcP2zAkR ypxucjtsmCP6Qz9vz5SlGTtW8X/iwSaOa4AnvqZ1r+LloDWyT5jIkWjoUAwZkHu4TM AtVVcLp3kge97eZn1QYTQCCMqk/PlPudsiyvv5sHoMzjzGr8/ua57wMKXhRILqumVu TpumQ5ep887CQ== Date: Thu, 16 Apr 2026 16:11:53 -0600 From: Keith Busch To: Tao Jiang Cc: linux-nvme@lists.infradead.org, axboe@kernel.dk, hch@lst.de, sagi@grimberg.me, linux-kernel@vger.kernel.org Subject: Re: [PATCH] nvme-pci: add quirk for Memblaze Pblaze5 (0x1c5f:0x0555) Message-ID: References: <1776274035-1604-1-git-send-email-tanroame.kyle@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1776274035-1604-1-git-send-email-tanroame.kyle@gmail.com> 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 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.