From mboxrd@z Thu Jan 1 00:00:00 1970 From: Samuel Ortiz Subject: Re: [PATCH 2/3] mmc: tmio: implement a bounce buffer for unaligned DMA Date: Fri, 26 Nov 2010 13:04:44 +0100 Message-ID: <20101126120443.GI5520@sortiz-mobl> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mga01.intel.com ([192.55.52.88]:47477 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750880Ab0KZMEr (ORCPT ); Fri, 26 Nov 2010 07:04:47 -0500 Content-Disposition: inline In-Reply-To: Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Guennadi Liakhovetski Cc: linux-mmc@vger.kernel.org, linux-sh@vger.kernel.org, Ian Molton Hi Guennadi, On Tue, Nov 23, 2010 at 05:24:15PM +0100, Guennadi Liakhovetski wrote: > For example, with SDIO WLAN cards, some transfers happen with buffers at odd > addresses, whereas the SH-Mobile DMA engine requires even addresses for SDHI. > This patch extends the tmio driver with a bounce buffer, that is used for > single entry scatter-gather lists both for sending and receiving. If we ever > encounter unaligned transfers with multi-element sg lists, this patch will have > to be extended. For now it just falls back to PIO in this and other unsupported > cases. > > Signed-off-by: Guennadi Liakhovetski I'm not sure about who is going to carry those patches, probably not me though. So, for the MFD part: Acked-by: Samuel Ortiz Cheers, Samuel. -- Intel Open Source Technology Centre http://oss.intel.com/