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 3DDF0CDB470 for ; Wed, 24 Jun 2026 05:54:09 +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:Content-Transfer-Encoding: Content-Type:MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=NUYPzUSf3PdQJYf/XNNIrmW9dptYXtkI8R1fqybFRLc=; b=us0VA/Eafaeok4lWCtvwrIlqHA 2r8B2dvY2hw+XIsvqIjlH9tRw0QE+AJ9Ny0XtVV7uHCcb0d1NF9qRGmm+lLp8efwQkd4FrjOFYJ8R mr+JyavL/VhsU3CkJrcbwr0uamXJeOFYpzHva/veVBImy3KLzBjirpEAt69FWCLYtMz3iXCzEjbD9 NFeCWELCGMb9SsERQtJG1awKvnPZVTky06LfzLFd1BHSx+ZkAw4fvedogUo/mxgfiQLbJB5xt+xxa 840BTOC8rQyULKfaONus9m9FpK+4GDs5ScTM85OdcztyABEjPLFDj50aQJvCs3vqkTdkRILzXVQOc NevDheqQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wcGYp-00000007Bew-3jGf; Wed, 24 Jun 2026 05:54:07 +0000 Received: from mailgw.kylinos.cn ([124.126.103.232]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wcGYm-00000007Bd9-47t5 for linux-nvme@lists.infradead.org; Wed, 24 Jun 2026 05:54:07 +0000 X-UUID: 170757aa6f9111f1aa26b74ffac11d73-20260624 X-CID-CACHE: Type:Local,Time:202606241347+08,HitQuantity:1 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.12,REQID:c60e2776-d322-4ade-a4a2-13a6b604109d,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:e7bac3a,CLOUDID:da51d481b21873dbf0d7783d2afb6243,BulkI D:nil,BulkQuantity:0,Recheck:0,SF:102|136|865|898,TC:nil,Content:0|15|50,E DM:-3,IP:nil,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA :0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: 170757aa6f9111f1aa26b74ffac11d73-20260624 X-User: liuxixin@kylinos.cn Received: from [127.0.1.1] [(10.44.16.150)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA with TLSv1.3 TLS_AES_256_GCM_SHA384 256/256) with ESMTP id 1126859520; Wed, 24 Jun 2026 13:53:57 +0800 From: Xixin Liu To: linux-nvme@lists.infradead.org Cc: kbusch@kernel.org, axboe@kernel.dk, hch@lst.de, sagi@grimberg.me, linux-kernel@vger.kernel.org, liuxixin@kylinos.cn Subject: [PATCH v1 0/1] nvme: zns: cap zone report nr_zones by DMA buffer size Date: Wed, 24 Jun 2026 13:53:40 +0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Mailer: nvme-ecn124/send-local.py X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260623_225405_394500_33990A8B X-CRM114-Status: UNSURE ( 5.09 ) X-CRM114-Notice: Please train this message. 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 Hi, The ZNS host driver issues Zone Management Receive with Partial Report (PR=1) fixed. The Number of Zones (NZ) field in the report header must reflect the zone descriptors actually transferred in the DMA buffer (ZNS Command Set Specification Rev 1.2, section 3.4.2). nvme_ns_report_zones() caps the parse loop by the device-reported NZ and the caller's nr_zones limit, but not by the number of descriptors that fit in buflen. Cap nz with min3(device NZ, nr_zones - zone_idx, max_in_buf). Thanks, Xixin Liu --- Xixin Liu (1): nvme: zns: cap zone report nr_zones by DMA buffer size drivers/nvme/host/zns.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) -- 2.43.0