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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 E6BBBC468B0 for ; Fri, 14 Jun 2019 14:49:31 +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 C59002133D for ; Fri, 14 Jun 2019 14:49:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C59002133D 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 8AD631379; Fri, 14 Jun 2019 14:49:31 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 5A1BA1374 for ; Fri, 14 Jun 2019 14:49:30 +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 97A91E5 for ; Fri, 14 Jun 2019 14:49:27 +0000 (UTC) Received: by newverein.lst.de (Postfix, from userid 2407) id C373F68AFE; Fri, 14 Jun 2019 16:48:57 +0200 (CEST) Date: Fri, 14 Jun 2019 16:48:57 +0200 From: Christoph Hellwig To: Greg KH Subject: Re: [PATCH 12/16] staging/comedi: mark as broken Message-ID: <20190614144857.GA9088@lst.de> References: <20190614134726.3827-1-hch@lst.de> <20190614134726.3827-13-hch@lst.de> <20190614140239.GA7234@kroah.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190614140239.GA7234@kroah.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Maxime Ripard , Joonas Lahtinen , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, Christoph Hellwig , devel@driverdev.osuosl.org, linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org, David Airlie , linux-media@vger.kernel.org, Intel Linux Wireless , intel-gfx@lists.freedesktop.org, Maarten Lankhorst , Jani Nikula , Ian Abbott , Rodrigo Vivi , Sean Paul , "moderated list:ARM PORT" , netdev@vger.kernel.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, H Hartley Sweeten , iommu@lists.linux-foundation.org, Daniel Vetter 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 14, 2019 at 04:02:39PM +0200, Greg KH wrote: > Perhaps a hint as to how we can fix this up? This is the first time > I've heard of the comedi code not handling dma properly. It can be fixed by: a) never calling virt_to_page (or vmalloc_to_page for that matter) on dma allocation b) never remapping dma allocation with conflicting cache modes (no remapping should be doable after a) anyway). _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [PATCH 12/16] staging/comedi: mark as broken Date: Fri, 14 Jun 2019 16:48:57 +0200 Message-ID: <20190614144857.GA9088@lst.de> References: <20190614134726.3827-1-hch@lst.de> <20190614134726.3827-13-hch@lst.de> <20190614140239.GA7234@kroah.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20190614140239.GA7234@kroah.com> Sender: linux-kernel-owner@vger.kernel.org To: Greg KH Cc: Christoph Hellwig , Maarten Lankhorst , Maxime Ripard , Sean Paul , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Ian Abbott , H Hartley Sweeten , devel@driverdev.osuosl.org, linux-s390@vger.kernel.org, Intel Linux Wireless , linux-rdma@vger.kernel.org, netdev@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org List-Id: linux-rdma@vger.kernel.org On Fri, Jun 14, 2019 at 04:02:39PM +0200, Greg KH wrote: > Perhaps a hint as to how we can fix this up? This is the first time > I've heard of the comedi code not handling dma properly. It can be fixed by: a) never calling virt_to_page (or vmalloc_to_page for that matter) on dma allocation b) never remapping dma allocation with conflicting cache modes (no remapping should be doable after a) anyway). From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from verein.lst.de ([213.95.11.211]:47569 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728208AbfFNOt2 (ORCPT ); Fri, 14 Jun 2019 10:49:28 -0400 Date: Fri, 14 Jun 2019 16:48:57 +0200 From: Christoph Hellwig Subject: Re: [PATCH 12/16] staging/comedi: mark as broken Message-ID: <20190614144857.GA9088@lst.de> References: <20190614134726.3827-1-hch@lst.de> <20190614134726.3827-13-hch@lst.de> <20190614140239.GA7234@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190614140239.GA7234@kroah.com> Sender: linux-s390-owner@vger.kernel.org List-ID: To: Greg KH Cc: Christoph Hellwig , Maarten Lankhorst , Maxime Ripard , Sean Paul , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Ian Abbott , H Hartley Sweeten , devel@driverdev.osuosl.org, linux-s390@vger.kernel.org, Intel Linux Wireless , linux-rdma@vger.kernel.org, netdev@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, "moderated list:ARM PORT" , linux-media@vger.kernel.org On Fri, Jun 14, 2019 at 04:02:39PM +0200, Greg KH wrote: > Perhaps a hint as to how we can fix this up? This is the first time > I've heard of the comedi code not handling dma properly. It can be fixed by: a) never calling virt_to_page (or vmalloc_to_page for that matter) on dma allocation b) never remapping dma allocation with conflicting cache modes (no remapping should be doable after a) anyway). 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=-2.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,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 01D8FC31E4B for ; Fri, 14 Jun 2019 14:49:33 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id B93F52133D for ; Fri, 14 Jun 2019 14:49:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ErcEst2C" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B93F52133D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=tj6wAuToGYFb2hFOqrjDb2k2fc40qsTaGZKE4yoXwJM=; b=ErcEst2C9A24V5 B4SRxfZvKTvE+gr/BF4WaPA+iQAZhyT1W8nTntLZPvtdJJ7wg3kkaDm4dYAbttur6FM5Qd8QMLc5J 18kibk9eXlz3SoodTsNYqnykh0PJV1S1kQguMJQUcLnRDxzh0o2WnDpJ0Sl6LEt7Pl/EUy7Z6bR9G UAPHJMRe015StPmzerHl9XDSy98otjg8FK889H+OAUXMmGYntm15+w4Ar02j+1cbRzrK2tgFrtGnY h0RKvi5mW03hPMlBsXXAif2hN9dAIjCyEBSed79TThqwa+8XfI8J03CfnbiWCXpKWPqZjqcoHpAsl Jo8htUchXvu9QtW13tLQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hbnWF-0002km-HV; Fri, 14 Jun 2019 14:49:31 +0000 Received: from verein.lst.de ([213.95.11.211] helo=newverein.lst.de) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hbnWC-0002jq-0f for linux-arm-kernel@lists.infradead.org; Fri, 14 Jun 2019 14:49:29 +0000 Received: by newverein.lst.de (Postfix, from userid 2407) id C373F68AFE; Fri, 14 Jun 2019 16:48:57 +0200 (CEST) Date: Fri, 14 Jun 2019 16:48:57 +0200 From: Christoph Hellwig To: Greg KH Subject: Re: [PATCH 12/16] staging/comedi: mark as broken Message-ID: <20190614144857.GA9088@lst.de> References: <20190614134726.3827-1-hch@lst.de> <20190614134726.3827-13-hch@lst.de> <20190614140239.GA7234@kroah.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190614140239.GA7234@kroah.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190614_074928_211861_ED096BE3 X-CRM114-Status: UNSURE ( 8.64 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Maxime Ripard , Joonas Lahtinen , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, Christoph Hellwig , devel@driverdev.osuosl.org, linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org, David Airlie , linux-media@vger.kernel.org, Intel Linux Wireless , intel-gfx@lists.freedesktop.org, Maarten Lankhorst , Jani Nikula , Ian Abbott , Rodrigo Vivi , Sean Paul , "moderated list:ARM PORT" , netdev@vger.kernel.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, H Hartley Sweeten , iommu@lists.linux-foundation.org, Daniel Vetter Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Jun 14, 2019 at 04:02:39PM +0200, Greg KH wrote: > Perhaps a hint as to how we can fix this up? This is the first time > I've heard of the comedi code not handling dma properly. It can be fixed by: a) never calling virt_to_page (or vmalloc_to_page for that matter) on dma allocation b) never remapping dma allocation with conflicting cache modes (no remapping should be doable after a) anyway). _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel