From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-6.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 6EEE07D2EF for ; Fri, 7 Jun 2019 08:35:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726531AbfFGIfP (ORCPT ); Fri, 7 Jun 2019 04:35:15 -0400 Received: from verein.lst.de ([213.95.11.211]:54791 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725978AbfFGIfO (ORCPT ); Fri, 7 Jun 2019 04:35:14 -0400 Received: by newverein.lst.de (Postfix, from userid 2407) id 7922868C4E; Fri, 7 Jun 2019 10:34:47 +0200 (CEST) Date: Fri, 7 Jun 2019 10:34:47 +0200 From: Christoph Hellwig To: Yoshihiro Shimoda Cc: Christoph Hellwig , "corbet@lwn.net" , "jroedel@suse.de" , "m.szyprowski@samsung.com" , "linux-doc@vger.kernel.org" , "iommu@lists.linux-foundation.org" Subject: Re: [PATCH] Documentation: DMA-API: fix a function name of max_mapping_size Message-ID: <20190607083447.GA10860@lst.de> References: <1559893633-6852-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> <20190607080814.GA10303@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On Fri, Jun 07, 2019 at 08:19:08AM +0000, Yoshihiro Shimoda wrote: > Hi Christoph, > > > From: Christoph Hellwig, Sent: Friday, June 7, 2019 5:08 PM > > > > Looks good. And it seems like you've also found the solution to > > your usb storage problem, but I'm going to post the variant I just > > hacked up nevertheless. > > Thank you for your reply! I think this API is related to my problem, > but I don't have any actual solution (a patch) for now. So, I'll wait > for your patch! Turns out it isn't as simple as I thought, as there doesn't seem to be an easy way to get to the struct device used for DMA mapping from USB drivers. I'll need to think a bit more how to handle that best. 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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham 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 1A3D7C28CC3 for ; Fri, 7 Jun 2019 08:36:13 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 EF5A320B7C for ; Fri, 7 Jun 2019 08:36:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EF5A320B7C 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 mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id A7F14ED9; Fri, 7 Jun 2019 08:36:12 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 9EACFED6 for ; Fri, 7 Jun 2019 08:35:14 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from newverein.lst.de (verein.lst.de [213.95.11.211]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 25B85A9 for ; Fri, 7 Jun 2019 08:35:14 +0000 (UTC) Received: by newverein.lst.de (Postfix, from userid 2407) id 7922868C4E; Fri, 7 Jun 2019 10:34:47 +0200 (CEST) Date: Fri, 7 Jun 2019 10:34:47 +0200 From: Christoph Hellwig To: Yoshihiro Shimoda Subject: Re: [PATCH] Documentation: DMA-API: fix a function name of max_mapping_size Message-ID: <20190607083447.GA10860@lst.de> References: <1559893633-6852-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> <20190607080814.GA10303@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Cc: "jroedel@suse.de" , "linux-doc@vger.kernel.org" , "corbet@lwn.net" , "iommu@lists.linux-foundation.org" , Christoph Hellwig X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 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 Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org On Fri, Jun 07, 2019 at 08:19:08AM +0000, Yoshihiro Shimoda wrote: > Hi Christoph, > > > From: Christoph Hellwig, Sent: Friday, June 7, 2019 5:08 PM > > > > Looks good. And it seems like you've also found the solution to > > your usb storage problem, but I'm going to post the variant I just > > hacked up nevertheless. > > Thank you for your reply! I think this API is related to my problem, > but I don't have any actual solution (a patch) for now. So, I'll wait > for your patch! Turns out it isn't as simple as I thought, as there doesn't seem to be an easy way to get to the struct device used for DMA mapping from USB drivers. I'll need to think a bit more how to handle that best. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu