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=-6.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 3543EC433FE for ; Tue, 21 Sep 2021 15:40:17 +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 F375760F44 for ; Tue, 21 Sep 2021 15:40:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org F375760F44 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc: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=Qb2uvBaVT9KyPnSi3VeAMHzPHs0we0L5F1k/RGqQ53Y=; b=jkAXILg/brA+4t VTomf0jJO3/X9Ctj8gb9jjJFZfiVb/QtXIHc58XqtmgzDasY8N4FzBoxgExLM4EikHKi5VspAdw9c Btk4EeBYbxdHOg0irIXCFOzZ8peFJBmW0KlOh26hvjMb47rsxaKC9+cdezTBFIe69aHOKbz8/Hs6b diMz4OR6P1upltDyM+koCN0MSJr9IBVl4MXF3uZtbxE8JSzk99zxkHx+cLyKzS46xlKC02Y1FP/in SgpE6PC583Ps2L6LgwQm4nZJMwn0nNtP/JoRbj50w9DINQlomyeuRjiMXQNUYi9ii/Rb+9i+/9sAm /Ohq1TCzI+fyPkHGcaVQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mShqW-004wIf-Oo; Tue, 21 Sep 2021 15:38:12 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mShqS-004wI0-VB for linux-arm-kernel@lists.infradead.org; Tue, 21 Sep 2021 15:38:10 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 620AF67373; Tue, 21 Sep 2021 17:38:05 +0200 (CEST) Date: Tue, 21 Sep 2021 17:38:05 +0200 From: Christoph Hellwig To: Mike Rapoport Cc: Christoph Hellwig , Catalin Marinas , David Hildenbrand , Robin Murphy , Alex Bee , Will Deacon , Andrew Morton , Anshuman Khandual , Linux Kernel Mailing List , linux-mm@kvack.org, Linux ARM Subject: Re: [BUG 5.14] arm64/mm: dma memory mapping fails (in some cases) Message-ID: <20210921153805.GA29952@lst.de> References: <0908ce39-7e30-91fa-68ef-11620f9596ae@arm.com> <60a11eba-2910-3b5f-ef96-97d4556c1596@redhat.com> <20210825102044.GA3420@arm.com> <20210918051843.GA16104@lst.de> <20210921082007.GA29121@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: 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-20210921_083809_194840_192B79CF X-CRM114-Status: GOOD ( 15.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Sep 21, 2021 at 12:34:10PM +0300, Mike Rapoport wrote: > > It doesn't create any new mappings. The only real issue is that it > > does the wrong thing for RAM in a way that might not be noticed on > > simple (x86/PC) platforms. > > But if the mapping request was rejected by devm_ioremap_resource() because > of an attempt to map RAM, why we would get to dma_map_resource() at all? dma_map_resource takes a phys_addr_t that could come from anywhere. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel