Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751537AbbESWfA (ORCPT ); Tue, 19 May 2015 18:35:00 -0400 Received: from pandora.arm.linux.org.uk ([78.32.30.218]:58168 "EHLO pandora.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751155AbbESWe6 (ORCPT ); Tue, 19 May 2015 18:34:58 -0400 Date: Tue, 19 May 2015 23:34:44 +0100 From: Russell King - ARM Linux To: Arnd Bergmann Cc: linux-arm-kernel@lists.infradead.org, Lorenzo Nava , Catalin Marinas , linux-kernel@vger.kernel.org Subject: Re: [RFC] arm: DMA-API contiguous cacheable memory Message-ID: <20150519223444.GO2067@n2100.arm.linux.org.uk> References: <20150519163436.GZ21251@e104818-lin.cambridge.arm.com> <2882347.Nj1Dq9Wlqh@wuerfel> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2882347.Nj1Dq9Wlqh@wuerfel> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 662 Lines: 16 On Wed, May 20, 2015 at 12:14:48AM +0200, Arnd Bergmann wrote: > With that memory, you should be able to use the normal streaming > API (dma_sync_single_for_*). Wrong, as I've pointed out previously. The only memory which you're allowed to sync is with memory which has been mapped with a dma_map_*() function. -- FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up according to speedtest.net. -- 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/