From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753449AbZFQPMR (ORCPT ); Wed, 17 Jun 2009 11:12:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752483AbZFQPMF (ORCPT ); Wed, 17 Jun 2009 11:12:05 -0400 Received: from ixro-out-rtc.ixiacom.com ([92.87.192.98]:8866 "EHLO ixro-ex1.ixiacom.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752411AbZFQPMF convert rfc822-to-8bit (ORCPT ); Wed, 17 Jun 2009 11:12:05 -0400 Date: Wed, 17 Jun 2009 18:12:04 +0300 From: Dragos Tatulea To: Dan Williams Cc: linux-kernel@vger.kernel.org, Octavian Purdila Subject: Re: DMA_ENGINE: can't use it without selecting a dma engine driver Message-ID: <20090617181204.52981f5f@dragos-tp.localdomain> In-Reply-To: References: <20090617005318.1e35ae98@dragos-tp.localdomain> Organization: IXIA X-Mailer: Claws Mail 3.7.1 (GTK+ 2.16.1; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT X-OriginalArrivalTime: 17 Jun 2009 15:12:04.0491 (UTC) FILETIME=[F8FA25B0:01C9EF5D] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, > > > >        Just discovered that it's impossible to select the dma engine > > without compiling a dma engine driver from the kernel. What if I want to > > use a different dma engine? > > > > Create a Kconfig entry for your driver in drivers/dma/Kconfig and have > it "select DMA_ENGINE". That's what I want to avoid. The dma engine driver is out of tree. What is the rationale behind this? It seems (to me) impossible to have all such drivers in upstream. Thanks, Dragos