From: Lee Jones Subject: Re: [PATCH 05/39] ARM: ux500: Stop passing MMC's platform data for Device Tree boots Date: Mon, 10 Jun 2013 10:15:03 +0100 Message-ID: <20130610091503.GF20297@gmail.com> References: <1368611522-9984-1-git-send-email-lee.jones@linaro.org> <1368611522-9984-6-git-send-email-lee.jones@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , Felipe Balbi , "linux-usb@vger.kernel.org" , "linux-crypto@vger.kernel.org" , "David S. Miller" , Herbert Xu , Vinod Koul , Linus WALLEIJ , Arnd Bergmann , Srinidhi KASAGAR To: Linus Walleij Return-path: Received: from mail-ea0-f181.google.com ([209.85.215.181]:45908 "EHLO mail-ea0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752665Ab3FJJPI (ORCPT ); Mon, 10 Jun 2013 05:15:08 -0400 Received: by mail-ea0-f181.google.com with SMTP id a15so2832705eae.40 for ; Mon, 10 Jun 2013 02:15:07 -0700 (PDT) Content-Disposition: inline In-Reply-To: Sender: linux-crypto-owner@vger.kernel.org List-ID: On Wed, 15 May 2013, Linus Walleij wrote: > On Wed, May 15, 2013 at 11:51 AM, Lee Jones wr= ote: >=20 > > It was required to pass DMA channel configuration information to th= e > > MMC driver before the new DMA API was in place. Now that it is, and > > is fully compatible with Device Tree we can stop doing that. > > > > Reviewed-by: Linus Walleij > > Signed-off-by: Lee Jones >=20 > So since the use of dma_request_slave_channel() is not upstream, > I guess this will break DMA use (i.e slow down transfers!) on all > device tree boots? >=20 > I'd be happy to apply it once the MMCI patch is in linux-next > indicating there may just be a window in the merge period > where it falls back to IRQ mode, but I don't want to disable > DMA on DT boots for an entire kernel cycle just like that. >=20 > Not applied as of yet. I believe it's now okay to apply this. --=20 Lee Jones Linaro ST-Ericsson Landing Team Lead Linaro.org =E2=94=82 Open source software for ARM SoCs =46ollow Linaro: Facebook | Twitter | Blog