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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,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=ham 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 67F3BC3A5A0 for ; Mon, 19 Aug 2019 22:42:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3257C22CF5 for ; Mon, 19 Aug 2019 22:42:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="OFND1rmg" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728508AbfHSWmF (ORCPT ); Mon, 19 Aug 2019 18:42:05 -0400 Received: from mail-pl1-f196.google.com ([209.85.214.196]:43900 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728689AbfHSWmC (ORCPT ); Mon, 19 Aug 2019 18:42:02 -0400 Received: by mail-pl1-f196.google.com with SMTP id 4so1661855pld.10 for ; Mon, 19 Aug 2019 15:42:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=avU/iuX5+szENCh6eMm7vCYspNq4hdUwgbH/njQngfc=; b=OFND1rmgXyw6LWuY+eLUQRwxvnMhRmpu5MjaxbTwDcTsnS3b0DDRG2yncdO95+ASAn 6W5aClKomCmX8LC9MdjfJiSb/bE3p3pYKdNr2IRBI5oEtZAsjoGRxITfKj2d/p0jD6ZQ YH8iaFIW+Omeh8uDSnOwMgSDqAKOo5tBwspFA= 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:mime-version:content-transfer-encoding; bh=avU/iuX5+szENCh6eMm7vCYspNq4hdUwgbH/njQngfc=; b=uNoTN7N0hRhX813S4+LQNWs46n0Je90gO0BSmnsQAmj1eEvCmIiq01ODCcGix+/h0y ouxligm4vJHtS4SVuyZVuNJ38/ASJPDrVqFh9487Un0MVjNzB3rQbEYeLluwqU4SAmD7 hnOrtYYkIuPe8uu54UY8IbEyhbslgSYvpV3M+wugPapf7hs0ghsXqK4lhhHFwEvPxkFF SV4K9PdQH76ZoX1aHUyhGMOZvRwuxTUISqWZvFKb5es0TbrOb8i/oEfIEGvhWcwadzaZ B2ZQNrY/Jeaqgokz8TmAc1/ikiuKjq/jE4pdjaXwzWJ1B8YoFpI+PfF/5zTnIxwI0RCe pzdg== X-Gm-Message-State: APjAAAXGZyhwigJeE8wLpdspYAMhpslPrXYPDeCSGSXS+H8ahwHoSl4Y CmgR4UQ0CUK/jW1ld0eZixYZXLg/ZmV6vQ== X-Google-Smtp-Source: APXvYqwXdWR0/1wtcv66DD8YVP1tY0at57N7sr2iIEC2dKXHGQ3aZmiWV4/HLCtdF3OfUaFVkZbpAg== X-Received: by 2002:a17:902:346:: with SMTP id 64mr25022324pld.151.1566254521350; Mon, 19 Aug 2019 15:42:01 -0700 (PDT) Received: from smtp.gmail.com ([2620:15c:202:1:fa53:7765:582b:82b9]) by smtp.gmail.com with ESMTPSA id e9sm16841593pge.39.2019.08.19.15.42.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Aug 2019 15:42:00 -0700 (PDT) From: Stephen Boyd To: "Rafael J. Wysocki" Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Qian Cai , Tri Vo Subject: [PATCH v4 1/2] PM / wakeup: Register wakeup class kobj after device is added Date: Mon, 19 Aug 2019 15:41:57 -0700 Message-Id: <20190819224158.62954-2-swboyd@chromium.org> X-Mailer: git-send-email 2.23.0.rc1.153.gdeed80330f-goog In-Reply-To: <20190819224158.62954-1-swboyd@chromium.org> References: <20190819224158.62954-1-swboyd@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The device_set_wakeup_enable() function can be called on a device that hasn't been registered with device_add() yet. This allows the device to be in a state where wakeup is enabled for it but the device isn't published to userspace in sysfs yet. After commit 986845e747af ("PM / wakeup: Show wakeup sources stats in sysfs"), calling device_set_wakeup_enable() will fail for a device that hasn't been registered with the driver core via device_add(). This is because we try to create sysfs entries for the device and associate a wakeup class kobject with it before the device has been registered. Let's follow a similar approach that device_set_wakeup_capable() takes here and register the wakeup class either from device_set_wakeup_enable() when the device is already registered, or from dpm_sysfs_add() when the device is being registered with the driver core via device_add(). Fixes: 986845e747af ("PM / wakeup: Show wakeup sources stats in sysfs") Reported-by: Qian Cai Cc: Qian Cai Cc: Tri Vo Reviewed-by: Tri Vo Signed-off-by: Stephen Boyd --- drivers/base/power/power.h | 9 +++++++++ drivers/base/power/sysfs.c | 6 ++++++ drivers/base/power/wakeup.c | 10 ++++++---- drivers/base/power/wakeup_stats.c | 13 +++++++++++++ 4 files changed, 34 insertions(+), 4 deletions(-) diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h index 57b1d1d88c8e..39a06a0cfdaa 100644 --- a/drivers/base/power/power.h +++ b/drivers/base/power/power.h @@ -157,4 +157,13 @@ extern int wakeup_source_sysfs_add(struct device *parent, struct wakeup_source *ws); extern void wakeup_source_sysfs_remove(struct wakeup_source *ws); +extern int pm_wakeup_source_sysfs_add(struct device *parent); + +#else /* !CONFIG_PM_SLEEP */ + +static inline int pm_wakeup_source_sysfs_add(struct device *parent) +{ + return 0; +} + #endif /* CONFIG_PM_SLEEP */ diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index 1b9c281cbe41..d7d82db2e4bc 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -5,6 +5,7 @@ #include #include #include +#include #include #include #include "power.h" @@ -667,8 +668,13 @@ int dpm_sysfs_add(struct device *dev) if (rc) goto err_wakeup; } + rc = pm_wakeup_source_sysfs_add(dev); + if (rc) + goto err_latency; return 0; + err_latency: + sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group); err_wakeup: sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group); err_runtime: diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c index f7925820b5ca..5817b51d2b15 100644 --- a/drivers/base/power/wakeup.c +++ b/drivers/base/power/wakeup.c @@ -220,10 +220,12 @@ struct wakeup_source *wakeup_source_register(struct device *dev, ws = wakeup_source_create(name); if (ws) { - ret = wakeup_source_sysfs_add(dev, ws); - if (ret) { - wakeup_source_free(ws); - return NULL; + if (!dev || device_is_registered(dev)) { + ret = wakeup_source_sysfs_add(dev, ws); + if (ret) { + wakeup_source_free(ws); + return NULL; + } } wakeup_source_add(ws); } diff --git a/drivers/base/power/wakeup_stats.c b/drivers/base/power/wakeup_stats.c index 220a20ff8918..bc5e3945f7a8 100644 --- a/drivers/base/power/wakeup_stats.c +++ b/drivers/base/power/wakeup_stats.c @@ -184,6 +184,19 @@ int wakeup_source_sysfs_add(struct device *parent, struct wakeup_source *ws) } EXPORT_SYMBOL_GPL(wakeup_source_sysfs_add); +/** + * pm_wakeup_source_sysfs_add - Add wakeup_source attributes to sysfs + * for a device if they're missing. + * @parent: Device given wakeup source is associated with + */ +int pm_wakeup_source_sysfs_add(struct device *parent) +{ + if (!parent->power.wakeup || parent->power.wakeup->dev) + return 0; + + return wakeup_source_sysfs_add(parent, parent->power.wakeup); +} + /** * wakeup_source_sysfs_remove - Remove wakeup_source attributes from sysfs. * @ws: Wakeup source to be removed from sysfs. -- Sent by a computer through tubes