From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755698AbYIRQSS (ORCPT ); Thu, 18 Sep 2008 12:18:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753085AbYIRQSD (ORCPT ); Thu, 18 Sep 2008 12:18:03 -0400 Received: from smtpeu1.atmel.com ([195.65.72.27]:42388 "EHLO bagnes.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752789AbYIRQSB (ORCPT ); Thu, 18 Sep 2008 12:18:01 -0400 Date: Thu, 18 Sep 2008 18:16:56 +0200 From: Haavard Skinnemoen To: Timur Tabi Cc: dan.j.williams@intel.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] dmatest: properly handle duplicate DMA channels Message-ID: <20080918181656.6ff00a14@hskinnemo-gx745.norway.atmel.com> In-Reply-To: <1221754217-26974-1-git-send-email-timur@freescale.com> References: <1221754217-26974-1-git-send-email-timur@freescale.com> X-Mailer: Claws Mail 3.5.0 (GTK+ 2.12.11; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit X-OriginalArrivalTime: 18 Sep 2008 16:16:46.0582 (UTC) FILETIME=[F2863960:01C919A9] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Timur Tabi wrote: > Update the the dmatest driver so that it handles duplicate DMA channels > properly. > > When a DMA client is notified of an available DMA channel, it must check if it > has already allocated resources for that channel. If so, it should return > DMA_DUP. This can happen, for example, if a DMA driver calls > dma_async_device_register() more than once. > > Signed-off-by: Timur Tabi Acked-by: Haavard Skinnemoen