From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ulf Hansson Subject: [PATCH 1/4] PM / Domains: Use the base device for driver_deferred_probe_check_state() Date: Thu, 25 Apr 2019 11:04:10 +0200 Message-ID: <20190425090413.10700-2-ulf.hansson@linaro.org> References: <20190425090413.10700-1-ulf.hansson@linaro.org> Return-path: In-Reply-To: <20190425090413.10700-1-ulf.hansson@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: "Rafael J . Wysocki" , linux-pm@vger.kernel.org Cc: Ulf Hansson , Daniel Lezcano , "Raju P . L . S . S . S . N" , Stephen Boyd , Tony Lindgren , Kevin Hilman , Lina Iyer , Rajendra Nayak , Viresh Kumar , Niklas Cassel , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Rob Herring List-Id: linux-pm@vger.kernel.org When genpd fails to attach a device to one of its multiple PM domains, we end up calling driver_deferred_probe_check_state() for the recently allocated virtual device. This is wrong, as it's the base device that is being probed. Fix this, by passing along the base device to __genpd_dev_pm_attach() and use that instead. Fixes: e01afc325025 ("PM / Domains: Stop deferring probe at the end of initcall") Cc: Rob Herring Signed-off-by: Ulf Hansson --- drivers/base/power/domain.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 8362dfe187f5..8aca1c9b4406 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2405,8 +2405,8 @@ static void genpd_dev_pm_sync(struct device *dev) genpd_queue_power_off_work(pd); } -static int __genpd_dev_pm_attach(struct device *dev, unsigned int index, - bool power_on) +static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev, + unsigned int index, bool power_on) { struct of_phandle_args pd_args; struct generic_pm_domain *pd; @@ -2424,7 +2424,7 @@ static int __genpd_dev_pm_attach(struct device *dev, unsigned int index, mutex_unlock(&gpd_list_lock); dev_dbg(dev, "%s() failed to find PM domain: %ld\n", __func__, PTR_ERR(pd)); - return driver_deferred_probe_check_state(dev); + return driver_deferred_probe_check_state(base_dev); } dev_dbg(dev, "adding to PM domain %s\n", pd->name); @@ -2480,7 +2480,7 @@ int genpd_dev_pm_attach(struct device *dev) "#power-domain-cells") != 1) return 0; - return __genpd_dev_pm_attach(dev, 0, true); + return __genpd_dev_pm_attach(dev, dev, 0, true); } EXPORT_SYMBOL_GPL(genpd_dev_pm_attach); @@ -2533,7 +2533,7 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev, } /* Try to attach the device to the PM domain at the specified index. */ - ret = __genpd_dev_pm_attach(virt_dev, index, false); + ret = __genpd_dev_pm_attach(virt_dev, dev, index, false); if (ret < 1) { device_unregister(virt_dev); return ret ? ERR_PTR(ret) : NULL; -- 2.17.1 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 X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 043E7C10F03 for ; Thu, 25 Apr 2019 09:04:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C1FC220656 for ; Thu, 25 Apr 2019 09:04:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="KQmk7AwU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727870AbfDYJEd (ORCPT ); Thu, 25 Apr 2019 05:04:33 -0400 Received: from mail-lj1-f196.google.com ([209.85.208.196]:33099 "EHLO mail-lj1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727811AbfDYJEc (ORCPT ); Thu, 25 Apr 2019 05:04:32 -0400 Received: by mail-lj1-f196.google.com with SMTP id f23so19571725ljc.0 for ; Thu, 25 Apr 2019 02:04:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=+54V2h/XgAc13rlQ/SlFnygRmRch2uFRJkG3WKQRigw=; b=KQmk7AwUQoPW2mhxbS6TbUc3r7+PGjbj3/fAGNr0k/M5E/bxs6vjesb1EMTfE7qahu mjo053Qcdz2MYbIjtNyE7tk3CSwVWY4AmlrbjMN2XtSANsD7HX0Y7TKnR6+OsbtFse5O sXUna4rQr9RO0G+sqR3DobsE8n83OOOlNyW5KXVh7DjHRh3P8pUEFJTfACqAyKBwI7TX yktVEhPgbp3tH5ruHg2A3odsJAf2+82PNfNTMHdnf/kcNOBJVo1U7s3bMp8koLCvLKHk 2U+oyKLdPNs9YiCni7hh9xZrSXDJCI96Ma0iVYbbGcQUyP6JBLg4WTbWJOAdQkbS322B mX/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=+54V2h/XgAc13rlQ/SlFnygRmRch2uFRJkG3WKQRigw=; b=Tic3Aj6flXHLi5ANnlym0s91/eYnID7UjSQ2I8V07ZKmlzXO0ItXFffkI6j7Gw5OAq +/lG+JOuPQb2Ngeuhx8VZtpgoD9SL/16/IfsG39xj++e15my1CN0HajEoQH7lo5CWvsi jOgRt2ncyFn7hJGODrQs3sPTp3SI/7mjsTYLPkwcUJjlCb5Sl2l53mu5a2ZzVq8ofrO0 1GoxTZovqygKUbQnGLahnhcWTsxsQudFzTKUtucoWdPp2nTCZNIk4HStL5HKPo3JvPCZ G5aqiXy0r22nSYm+ftbcln6VvMXwTgdtjmpkrPp8nlfwOoJzbuxZu9npTuNrVc+F3oWV MIRw== X-Gm-Message-State: APjAAAULXcjivOzRJJV15KI4pSqYMgbCT4A2+PqI1uLYQjpKRZPFmbUi zkJSejlOKjcep6BCljOLFAHm6Q== X-Google-Smtp-Source: APXvYqwTUexwmpqjGqL8ndwTScbQ3jA2Gi9wk4uhiTaDz25Zi5/AQ81/TdtnywrUEXCFKwJaXlLlVg== X-Received: by 2002:a2e:9e04:: with SMTP id e4mr9087891ljk.74.1556183070284; Thu, 25 Apr 2019 02:04:30 -0700 (PDT) Received: from localhost.localdomain (h-158-174-22-210.NA.cust.bahnhof.se. [158.174.22.210]) by smtp.gmail.com with ESMTPSA id v26sm4517353lja.60.2019.04.25.02.04.28 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 25 Apr 2019 02:04:29 -0700 (PDT) From: Ulf Hansson To: "Rafael J . Wysocki" , linux-pm@vger.kernel.org Cc: Ulf Hansson , Daniel Lezcano , "Raju P . L . S . S . S . N" , Stephen Boyd , Tony Lindgren , Kevin Hilman , Lina Iyer , Rajendra Nayak , Viresh Kumar , Niklas Cassel , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Rob Herring Subject: [PATCH 1/4] PM / Domains: Use the base device for driver_deferred_probe_check_state() Date: Thu, 25 Apr 2019 11:04:10 +0200 Message-Id: <20190425090413.10700-2-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190425090413.10700-1-ulf.hansson@linaro.org> References: <20190425090413.10700-1-ulf.hansson@linaro.org> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Message-ID: <20190425090410.PK2ge9v45dDR7S2RCLJsp6TxLYSBdYYfhe6_gG9zyKA@z> When genpd fails to attach a device to one of its multiple PM domains, we end up calling driver_deferred_probe_check_state() for the recently allocated virtual device. This is wrong, as it's the base device that is being probed. Fix this, by passing along the base device to __genpd_dev_pm_attach() and use that instead. Fixes: e01afc325025 ("PM / Domains: Stop deferring probe at the end of initcall") Cc: Rob Herring Signed-off-by: Ulf Hansson --- drivers/base/power/domain.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 8362dfe187f5..8aca1c9b4406 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2405,8 +2405,8 @@ static void genpd_dev_pm_sync(struct device *dev) genpd_queue_power_off_work(pd); } -static int __genpd_dev_pm_attach(struct device *dev, unsigned int index, - bool power_on) +static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev, + unsigned int index, bool power_on) { struct of_phandle_args pd_args; struct generic_pm_domain *pd; @@ -2424,7 +2424,7 @@ static int __genpd_dev_pm_attach(struct device *dev, unsigned int index, mutex_unlock(&gpd_list_lock); dev_dbg(dev, "%s() failed to find PM domain: %ld\n", __func__, PTR_ERR(pd)); - return driver_deferred_probe_check_state(dev); + return driver_deferred_probe_check_state(base_dev); } dev_dbg(dev, "adding to PM domain %s\n", pd->name); @@ -2480,7 +2480,7 @@ int genpd_dev_pm_attach(struct device *dev) "#power-domain-cells") != 1) return 0; - return __genpd_dev_pm_attach(dev, 0, true); + return __genpd_dev_pm_attach(dev, dev, 0, true); } EXPORT_SYMBOL_GPL(genpd_dev_pm_attach); @@ -2533,7 +2533,7 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev, } /* Try to attach the device to the PM domain at the specified index. */ - ret = __genpd_dev_pm_attach(virt_dev, index, false); + ret = __genpd_dev_pm_attach(virt_dev, dev, index, false); if (ret < 1) { device_unregister(virt_dev); return ret ? ERR_PTR(ret) : NULL; -- 2.17.1