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 X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0B18C433E0 for ; Tue, 16 Mar 2021 08:00:58 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7313364FA8 for ; Tue, 16 Mar 2021 08:00:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7313364FA8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 0EBD0400E2; Tue, 16 Mar 2021 08:00:58 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5kgD37kLUelx; Tue, 16 Mar 2021 08:00:57 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp2.osuosl.org (Postfix) with ESMTP id 0945B43160; Tue, 16 Mar 2021 08:00:56 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id D1944C000B; Tue, 16 Mar 2021 08:00:56 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [IPv6:2605:bc80:3010::136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5CDA4C000A for ; Tue, 16 Mar 2021 08:00:55 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 4A55660641 for ; Tue, 16 Mar 2021 08:00:55 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FJLaXsCxA1kS for ; Tue, 16 Mar 2021 08:00:54 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by smtp3.osuosl.org (Postfix) with ESMTPS id B39F66060E for ; Tue, 16 Mar 2021 08:00:54 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 7AA4368C65; Tue, 16 Mar 2021 09:00:52 +0100 (CET) Date: Tue, 16 Mar 2021 09:00:52 +0100 From: Christoph Hellwig To: Logan Gunthorpe Subject: Re: [RFC PATCH v2 09/11] block: Add BLK_STS_P2PDMA Message-ID: <20210316080051.GD15949@lst.de> References: <20210311233142.7900-1-logang@deltatee.com> <20210311233142.7900-10-logang@deltatee.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210311233142.7900-10-logang@deltatee.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Minturn Dave B , Matthew Wilcox , Jason Gunthorpe , linux-pci@vger.kernel.org, Daniel Vetter , Dave Hansen , Ira Weiny , linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, Stephen Bates , linux-block@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Christian =?iso-8859-1?Q?K=F6nig?= , Jason Ekstrand , John Hubbard , Dan Williams , Jakowski Andrzej , Christoph Hellwig , Xiong Jianxin X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Thu, Mar 11, 2021 at 04:31:39PM -0700, Logan Gunthorpe wrote: > Create a specific error code for when P2PDMA pages are passed to a block > devices that cannot map them (due to no IOMMU support or ACS protections). > > This makes request errors in these cases more informative of as to what > caused the error. I really don't think we should bother with a specific error code here, we don't add a new status for every single possible logic error in the caller. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu