From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Stein Subject: Re: [PATCH] spi-topcliff-pch: Fix probing when DMA mode is used Date: Tue, 04 Mar 2014 07:52:56 +0100 Message-ID: <3771945.ph3nlbMubQ@ws-stein> References: <1393428679-18462-1-git-send-email-alexander.stein@systec-electronic.com> <2382434.oQkeY8Zb6p@ws-stein> <20140304044422.GJ2411@sirena.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Mark Brown Return-path: In-Reply-To: <20140304044422.GJ2411-GFdadSzt00ze9xe1eoZjHA@public.gmane.org> Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: On Tuesday 04 March 2014 12:44:22, Mark Brown wrote: > On Mon, Mar 03, 2014 at 08:21:16AM +0100, Alexander Stein wrote: > > Well, i think this is a rather rarely use case. You need either all > > drivers compiled in where the SPI device driver is loaded before SPI > > master or you need SPI master als module while the SPI device driver > > is already compiled in. Oh, and the SPI device driver must do a SPI > > transfer during probe. So the conditions are reptty strict when this > > problem might happen. > > > PS: On EG20T (PCH) it seems this will never happen as the DMA channels > > are allocated wrongly (see other patch from me) andso DMA will never > > be used. > > OK, so this doesn't sound terribly urgent then? It's hard to see and > other bugs mean it wouldn't be triggered anyway? Yes, at least for EG20T. I have no idea about those MLxxxx IOH. Alexander -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html