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 9204EC49EA5 for ; Thu, 24 Jun 2021 05:43:27 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 2C8A4613E8 for ; Thu, 24 Jun 2021 05:43:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2C8A4613E8 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 smtp4.osuosl.org (Postfix) with ESMTP id E52F94147F; Thu, 24 Jun 2021 05:43:26 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id E6MVxc8YaKQ2; Thu, 24 Jun 2021 05:43:26 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp4.osuosl.org (Postfix) with ESMTPS id C33D340311; Thu, 24 Jun 2021 05:43:25 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 7741FC0010; Thu, 24 Jun 2021 05:43:25 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 436A0C000E for ; Thu, 24 Jun 2021 05:43:24 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 1B0DB4010E for ; Thu, 24 Jun 2021 05:43:24 +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 G35tfwAhgxak for ; Thu, 24 Jun 2021 05:43:23 +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 smtp2.osuosl.org (Postfix) with ESMTPS id F2B2D400FF for ; Thu, 24 Jun 2021 05:43:22 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 6EF7567373; Thu, 24 Jun 2021 07:43:15 +0200 (CEST) Date: Thu, 24 Jun 2021 07:43:15 +0200 From: Christoph Hellwig To: Qian Cai Subject: Re: [PATCH v14 06/12] swiotlb: Use is_swiotlb_force_bounce for swiotlb data bouncing Message-ID: <20210624054315.GA25381@lst.de> References: <20210619034043.199220-1-tientzu@chromium.org> <20210619034043.199220-7-tientzu@chromium.org> <76c3343d-72e5-9df3-8924-5474ee698ef4@quicinc.com> <20210623183736.GA472@willie-the-truck> <19d4c7a2-744d-21e0-289c-a576e1f0e6f3@quicinc.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <19d4c7a2-744d-21e0-289c-a576e1f0e6f3@quicinc.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: heikki.krogerus@linux.intel.com, linux-devicetree , peterz@infradead.org, benh@kernel.crashing.org, joonas.lahtinen@linux.intel.com, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, grant.likely@arm.com, paulus@samba.org, Frank Rowand , mingo@kernel.org, jxgao@google.com, sstabellini@kernel.org, Saravana Kannan , mpe@ellerman.id.au, "Rafael J . Wysocki" , Christoph Hellwig , Bartosz Golaszewski , bskeggs@redhat.com, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, Dan Williams , matthew.auld@intel.com, Nicolas Boichat , thomas.hellstrom@linux.intel.com, Jim Quinlan , Will Deacon , Konrad Rzeszutek Wilk , intel-gfx@lists.freedesktop.org, maarten.lankhorst@linux.intel.com, Robin Murphy , jani.nikula@linux.intel.com, Rob Herring , rodrigo.vivi@intel.com, bhelgaas@google.com, Claire Chang , boris.ostrovsky@oracle.com, Andy Shevchenko , jgross@suse.com, airlied@linux.ie, Thierry Reding , Greg KH , Randy Dunlap , lkml , "list@263.net:IOMMU DRIVERS" , daniel@ffwll.ch, xypron.glpk@gmx.de, thomas.lendacky@amd.com, linuxppc-dev@lists.ozlabs.org, bauerman@linux.ibm.com 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 Wed, Jun 23, 2021 at 02:44:34PM -0400, Qian Cai wrote: > is_swiotlb_force_bounce at /usr/src/linux-next/./include/linux/swiotlb.h:119 > > is_swiotlb_force_bounce() was the new function introduced in this patch here. > > +static inline bool is_swiotlb_force_bounce(struct device *dev) > +{ > + return dev->dma_io_tlb_mem->force_bounce; > +} To me the crash looks like dev->dma_io_tlb_mem is NULL. Can you turn this into : return dev->dma_io_tlb_mem && dev->dma_io_tlb_mem->force_bounce; for a quick debug check? _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu