Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753662AbbEEQLQ (ORCPT ); Tue, 5 May 2015 12:11:16 -0400 Received: from mout.kundenserver.de ([212.227.126.130]:49867 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2993460AbbEEPpd (ORCPT ); Tue, 5 May 2015 11:45:33 -0400 From: Arnd Bergmann To: linux-arm-kernel@lists.infradead.org Cc: Suravee Suthikulpanit , rjw@rjwysocki.net, lenb@kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, thomas.lendacky@amd.com, herbert@gondor.apana.org.au, davem@davemloft.net, al.stone@linaro.org, linaro-acpi@lists.linaro.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, leo.duran@amd.com, hanjun.guo@linaro.org, msalter@redhat.com, grant.likely@linaro.org, linux-crypto@vger.kernel.org Subject: Re: [V2 PATCH 2/5] arm64 : Introduce support for ACPI _CCA object Date: Tue, 05 May 2015 17:44:49 +0200 Message-ID: <5126612.k0u2CL2zi5@wuerfel> User-Agent: KMail/4.11.5 (Linux/3.16.0-10-generic; KDE/4.11.5; x86_64; ; ) In-Reply-To: <1430838729-21572-3-git-send-email-Suravee.Suthikulpanit@amd.com> References: <1430838729-21572-1-git-send-email-Suravee.Suthikulpanit@amd.com> <1430838729-21572-3-git-send-email-Suravee.Suthikulpanit@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Provags-ID: V03:K0:Sc4EsDb8Q6h+dgSQXU8YiKnU7CKsFoaXY2nU/0R4qtoq0RXHyhM 921ePTlWJ8rJu5s9DdViGRQN/DdJxrLY8/X6y8ZMJ4Nzj2vMmOxfSCJOkKfSddIUYhyXY3j 4qWzBqoKEnxKdtcZleGTjqiRmzQOhP2v7ViUbhKi5+0+QDHHKgGH+AYSCx9ACU4GgB1SfqM mNxNzBBplSR23Pq05HjXw== X-UI-Out-Filterresults: notjunk:1; Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1329 Lines: 30 On Tuesday 05 May 2015 10:12:06 Suravee Suthikulpanit wrote: > +struct dma_map_ops dummy_dma_ops = { > + .alloc = __dummy_alloc, > + .free = __dummy_free, > + .mmap = __dummy_mmap, > + .map_page = __dummy_map_page, > + .unmap_page = __dummy_unmap_page, > + .map_sg = __dummy_map_sg, > + .unmap_sg = __dummy_unmap_sg, > + .sync_single_for_cpu = __dummy_sync_single_for_cpu, > + .sync_single_for_device = __dummy_sync_single_for_device, > + .sync_sg_for_cpu = __dummy_sync_sg_for_cpu, > + .sync_sg_for_device = __dummy_sync_sg_for_device, > + .mapping_error = __dummy_mapping_error, > + .dma_supported = __dummy_dma_supported, > +}; > +EXPORT_SYMBOL(dummy_dma_ops); > + > This will clearly work, but I think it's easier to just leave the dma_mask pointer as NULL when creating the platform device, which should let the normal dma ops fail all the callbacks. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/