Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966697Ab2EOUAu (ORCPT ); Tue, 15 May 2012 16:00:50 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:57137 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966685Ab2EOUAq (ORCPT ); Tue, 15 May 2012 16:00:46 -0400 Date: Tue, 15 May 2012 22:00:40 +0200 From: Sascha Hauer To: Saravana Kannan Cc: Mike Turquette , Arnd Bergman , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Andrew Lunn , Rob Herring , Russell King , Jeremy Kerr , Thomas Gleixner , Paul Walmsley , Shawn Guo , Jamie Iles , Richard Zhao , Magnus Damm , Mark Brown , Linus Walleij , Stephen Boyd , Amit Kucheria , Deepak Saxena , Grant Likely Subject: Re: [PATCH] clk: Fix race conditions between clk_set_parent() and clk_enable() Message-ID: <20120515200040.GP30400@pengutronix.de> References: <1336798797-8724-1-git-send-email-skannan@codeaurora.org> <20120515194245.GO30400@pengutronix.de> <4FB2B3AA.3010903@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4FB2B3AA.3010903@codeaurora.org> X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Uptime: 21:57:53 up 185 days, 3:44, 32 users, load average: 0.01, 0.02, 0.05 User-Agent: Mutt/1.5.21 (2010-09-15) X-SA-Exim-Connect-IP: 2001:6f8:1178:2:21e:67ff:fe11:9c5c X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1003 Lines: 25 On Tue, May 15, 2012 at 12:51:06PM -0700, Saravana Kannan wrote: > >> ret = clk->ops->set_parent(clk->hw, i); > > > >You call ->set_parent while holding a spinlock. This won't work with i2c > >clocks. > > I did account for that. I explained it in the commit text. Please > let me know if any part of that is not clear or is not correct. > I missed this part in the commit log. I have no idea whether we can live with this limitation though. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/