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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4AC73C433FE for ; Thu, 2 Dec 2021 17:28:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376342AbhLBRcR (ORCPT ); Thu, 2 Dec 2021 12:32:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50000 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376261AbhLBRcO (ORCPT ); Thu, 2 Dec 2021 12:32:14 -0500 Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8951C061757 for ; Thu, 2 Dec 2021 09:28:51 -0800 (PST) Received: by mail-pj1-x102c.google.com with SMTP id np3so278860pjb.4 for ; Thu, 02 Dec 2021 09:28:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to; bh=26CeGRCd68JtKjv3SM/hcjVd/dRiKGZetWjuZidyuzI=; b=Ahv55jCJo8eiu7Zh2FxT+ZUoKd3FPUwaS3grBkJ8l2d/OcVG5PwM7BgSdLOMz+rMeo UYasjU3s054aELgq0L+uCHwihZe5hyrQWrllgA3UoFzf8E3r27jqVle5VCYvHfUgmvCF C6ZKNuEQU/3QCpnOKq/H2CzIqmAGWdkWn5dgY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to; bh=26CeGRCd68JtKjv3SM/hcjVd/dRiKGZetWjuZidyuzI=; b=33x2Xv+rnQUJcRtsB5Tk7KmbY/BwI987RJzo1UsYhIOqQWfBrZ0vaOctVEH8Lx2xCs rwDNt37g5XVr26QIFKrOcbYGOVaf1MTwKit4aXts3mMlgf9rk8CK+yZj8UWKbKFJ/B8O 3YuFb4rS9OKrtczQs87KJiFFnR3ISFFPmF/st5S3liE5ak/GrsiJEuKjiycbYOhsIyrP RhkxO8PZKI5Ck9Z61iLgPZBnQKvk2mNlFEuhTMsZ/XhC9QsGTADG5e1cHtwui+gTUDCP rFlhdnt1ukfE82KQY4nro6MqFrwspK6177SNvwnXLLVFpvXPPvdnEBa9YoOB+IfyJpjZ jsKQ== X-Gm-Message-State: AOAM531JU80d3ZOr1Kx8mN2Up8Ft4a1Ho9KZkPULdP0FK4hKx8n1qHST JMhXog+B8fP/4MNVqNXZsJOmhA== X-Google-Smtp-Source: ABdhPJynqpm+ACePC6XXqju7sLq9VWRcAQe/BYC/UlUoAgraI+CoPNu1KUT1/EnmeS/ZvFFqrmCm/A== X-Received: by 2002:a17:902:b78b:b0:143:baac:2ebc with SMTP id e11-20020a170902b78b00b00143baac2ebcmr16634221pls.77.1638466130993; Thu, 02 Dec 2021 09:28:50 -0800 (PST) Received: from [10.67.48.245] ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id x9sm3026370pjq.50.2021.12.02.09.28.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 02 Dec 2021 09:28:49 -0800 (PST) Subject: Re: [PATCH 2/2] mmc: sdhci-brcmstb: "mmc1: Internal clock never stabilised." seen on 72113 To: Al Cooper , linux-kernel@vger.kernel.org Cc: Adrian Hunter , bcm-kernel-feedback-list@broadcom.com, Florian Fainelli , linux-arm-kernel@lists.infradead.org, linux-mmc@vger.kernel.org, Ray Jui , Scott Branden , Ulf Hansson References: <20211202163050.46810-1-alcooperx@gmail.com> <20211202163050.46810-2-alcooperx@gmail.com> From: Florian Fainelli Message-ID: Date: Thu, 2 Dec 2021 09:28:48 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: <20211202163050.46810-2-alcooperx@gmail.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000bd959a05d22d1f66" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --000000000000bd959a05d22d1f66 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit On 12/2/21 8:30 AM, Al Cooper wrote: > The problem is in the .shutdown callback that was added to the > sdhci-iproc and sdhci-brcmstb drivers to save power in S5. The > shutdown callback will just call the sdhci_pltfm_suspend() function > to suspend the lower level driver and then stop the sdhci system > clock. The problem is that in some cases there can be a worker > thread in the "system_freezable_wq" work queue that is scanning > for a device every second. In normal system suspend, this queue > is suspended before the driver suspend is called. In shutdown the > queue is not suspended and the thread my run after we stop the > sdhci clock in the shutdown callback which will cause the "clock > never stabilised" error. The solution will be to have the shutdown > callback cancel the worker thread before calling suspend (and > stopping the sdhci clock). > > NOTE: This is only happening on systems with the Legacy RPi SDIO > core because that's the only controller that doesn't have the > presence signal and needs to use a worker thread to do a 1 second > poll loop. > > Fixes: 5b191dcba719 ("mmc: sdhci-brcmstb: Fix mmc timeout errors on S5 suspend") > Signed-off-by: Al Cooper Acked-by: Florian Fainelli -- Florian --000000000000bd959a05d22d1f66 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQeQYJKoZIhvcNAQcCoIIQajCCEGYCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3QMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE 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