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 BBB09C77B7D for ; Thu, 18 May 2023 08:09:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229913AbjERIJ5 (ORCPT ); Thu, 18 May 2023 04:09:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47936 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229905AbjERIJ4 (ORCPT ); Thu, 18 May 2023 04:09:56 -0400 Received: from mail-ed1-x534.google.com (mail-ed1-x534.google.com [IPv6:2a00:1450:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9A4897 for ; Thu, 18 May 2023 01:09:54 -0700 (PDT) Received: by mail-ed1-x534.google.com with SMTP id 4fb4d7f45d1cf-50db91640d3so2607282a12.0 for ; Thu, 18 May 2023 01:09:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1684397393; x=1686989393; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=EJxby0a+YmdYDvcCxlD5hpNSZCvF8AURr2ESqmEsXcQ=; b=roz1BvvCBDBA1YW13M5M3ur9lJkN+WLNuHW6bv0itetl1VXAc5QvBxAyp9qZfVVOlC xPwWe4qc6Uw3XPJBXglJsoJ2ZBgynrplDgJEhknrQNPjrd4zt4t5aXJy7dnX7DH+5UQ7 46xGeXz6+qGInnV/Wv4Y7/Ut0F+IQf4cBOYUSGuFlYhL9mmwL+QooPtzZ05AnaW4v8Kt 6pXps0uufagouohv5oiS2lKwb973gHGla86MJBu8NieWOrR1UCdplv6kndrqiylclAK+ bEb5vrB0ZxpdMM4n3ZFyTaP1rmplZiqB9v6TesrdlUunTWs084mF1/+oLV23QUyQiJqO 6mMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684397393; x=1686989393; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=EJxby0a+YmdYDvcCxlD5hpNSZCvF8AURr2ESqmEsXcQ=; b=XXHCI3GdEY7nL+XQO6wAuwq/SJAhJ6XKSK0QQ4nsskqwrC+6+GyqRSyD2CktYlYrj+ PxpwhG2JGxeD5bIfvMMptcXwN6A7VVd5v7zNI/h6nICrCgQYjQ8hIXkSt5vRkdnnN15o Uc83RYVnvJlJszQtL04ef51R6+8Fs3DDvJVq1+0Qvj4iZyJ55C9gPrnKSAOyzrpFthWx 2bbNcBmhMYlhFpSZBYiNQy6ktiG561/RUujk6u5rbvEWjQ7xMVTR32yV1sbeHMEn4AZQ 6oOvdnFQFUOJeYnwRr81FG4ThrOMLJUukMn3Q786pQ8qxpqmVk7NhP+nHgLbZWYe2ynI eVyA== X-Gm-Message-State: AC+VfDzx+jOjIBtMBlSEi0ZytNeB1fdZyj3xZFIYcRphKNI8lcmFyCO2 y40o7mSPjPO56PgvdlECQJb0/Q== X-Google-Smtp-Source: ACHHUZ663LuiIRBItYyQeixKa79sothnq8c+Ju+7jYvjArtC7VoF60c5++HSomzvx7utjoTUGIEH8w== X-Received: by 2002:a50:ee99:0:b0:50b:fd3c:3590 with SMTP id f25-20020a50ee99000000b0050bfd3c3590mr3989404edr.42.1684397393282; Thu, 18 May 2023 01:09:53 -0700 (PDT) Received: from ?IPV6:2a02:810d:15c0:828:a2b:c408:5834:f48e? ([2a02:810d:15c0:828:a2b:c408:5834:f48e]) by smtp.gmail.com with ESMTPSA id x21-20020aa7d6d5000000b00509dfb39b52sm278050edr.37.2023.05.18.01.09.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 18 May 2023 01:09:52 -0700 (PDT) Message-ID: <88987336-9558-e49c-326d-779bd3bc2aa0@linaro.org> Date: Thu, 18 May 2023 10:09:51 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [PATCH] PM / devfreq: exynos: add Exynos PPMU as a soft module dependency Content-Language: en-US To: Marek Szyprowski , Chanwoo Choi , linux-pm@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: MyungJoo Ham , Alim Akhtar References: <20230518074403.2894799-1-m.szyprowski@samsung.com> From: Krzysztof Kozlowski In-Reply-To: <20230518074403.2894799-1-m.szyprowski@samsung.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org On 18/05/2023 09:44, Marek Szyprowski wrote: > Commit adf8238ef403 ("ARM: dts: exynos: move exynos-bus nodes out of soc > in Exynos4412") changed the order of the exynos-bus nodes, what results > in different probe order of the Exynos Bus devices. Although the driver > properly handles the deferred probe and all devices seems to be finally > properly registered, this change revealed some kind of a bug related to > PPMU counters registration and passive governor operation. Usually in 1 > of 10 boots this results in complete board freeze during loading of the > kernel modules. > > To avoid that freeze, ensure that the Exynos PPMU driver is already > loaded before the Exynos Bus driver starts probing. > > Signed-off-by: Marek Szyprowski Reviewed-by: Krzysztof Kozlowski Best regards, Krzysztof