From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D0ECCC48BC4 for ; Thu, 15 Feb 2024 15:30:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=rRtV4PcG90YlSWdMwRW3JYOhGQS+gJWpT9hJKUwXVCU=; b=eEvKx1b3Hz+abH Yy0U1Gjss8pr1/XDja+j95VtGdsYFsC7BkzJCJgEbrltWtUvPIkeKYZLEpsKf4WiRIDB1oQA7bqqu Tfz63w7Esa2KZgBWR3DC6XX5H1ESIOyJzfhzaeuxAjcimEItHieHNvQP//RbPMrPYKaxFRU9nmMTI 3Ljru9ShgfZFYq9acAHzrTBFH7qSzQN9dp+PV7fpkqmPbLFTyVEL2KJA+zBVATZd64mVDVGmpEiTP Qlf4kqY3Ehokr0GBHtl2qiymugAEuvSTTHEcpE1IyDGX2ZiNEwHJICaNxAf0m4CSDasin0MDCjYGh GGAErrDqYJAxXDrEyq1g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1radge-0000000GkWI-0NB6; Thu, 15 Feb 2024 15:30:08 +0000 Received: from mgamail.intel.com ([192.198.163.15]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1radgb-0000000GkVc-3nqb; Thu, 15 Feb 2024 15:30:07 +0000 X-IronPort-AV: E=McAfee;i="6600,9927,10984"; a="2229294" X-IronPort-AV: E=Sophos;i="6.06,162,1705392000"; d="scan'208";a="2229294" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Feb 2024 07:30:06 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10984"; a="912180681" X-IronPort-AV: E=Sophos;i="6.06,162,1705392000"; d="scan'208";a="912180681" Received: from smile.fi.intel.com ([10.237.72.54]) by fmsmga002.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Feb 2024 07:29:58 -0800 Received: from andy by smile.fi.intel.com with local (Exim 4.97) (envelope-from ) id 1radgR-00000004pQG-2G9j; Thu, 15 Feb 2024 17:29:55 +0200 Date: Thu, 15 Feb 2024 17:29:55 +0200 From: Andy Shevchenko To: Thomas Richard Cc: Linus Walleij , Bartosz Golaszewski , Tony Lindgren , Haojian Zhuang , Vignesh R , Aaro Koskinen , Janusz Krzysztofik , Andi Shyti , Peter Rosin , Vinod Koul , Kishon Vijay Abraham I , Philipp Zabel , Lorenzo Pieralisi , Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , Rob Herring , Bjorn Helgaas , linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, linux-i2c@vger.kernel.org, linux-phy@lists.infradead.org, linux-pci@vger.kernel.org, gregory.clement@bootlin.com, theo.lebrun@bootlin.com, thomas.petazzoni@bootlin.com, u-kumar1@ti.com Subject: Re: [PATCH v3 05/18] mux: add mux_chip_resume() function Message-ID: References: <20240102-j7200-pcie-s2r-v3-0-5c2e4a3fac1f@bootlin.com> <20240102-j7200-pcie-s2r-v3-5-5c2e4a3fac1f@bootlin.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240102-j7200-pcie-s2r-v3-5-5c2e4a3fac1f@bootlin.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_073005_992621_783D8156 X-CRM114-Status: GOOD ( 16.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Feb 15, 2024 at 04:17:50PM +0100, Thomas Richard wrote: > The mux_chip_resume() function restores a mux_chip using the cached state > of each mux. ... > +int mux_chip_resume(struct mux_chip *mux_chip) > +{ > + int global_ret = 0; > + int ret, i; > + > + for (i = 0; i < mux_chip->controllers; ++i) { > + struct mux_control *mux = &mux_chip->mux[i]; > + > + if (mux->cached_state == MUX_CACHE_UNKNOWN) > + continue; > + > + ret = mux_control_set(mux, mux->cached_state); > + if (ret < 0) { > + dev_err(&mux_chip->dev, "unable to restore state\n"); > + if (!global_ret) > + global_ret = ret; Hmm... This will record the first error and continue. > + } > + } > + return global_ret; So here, we actually will get stale data in case there are > 1 failures. > +} -- With Best Regards, Andy Shevchenko _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel