From patchwork Mon Mar 13 14:27:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 13172596 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 81992C6FD19 for ; Mon, 13 Mar 2023 14:34:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231436AbjCMOe5 (ORCPT ); Mon, 13 Mar 2023 10:34:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49174 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231450AbjCMOel (ORCPT ); Mon, 13 Mar 2023 10:34:41 -0400 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D655E24BE7; Mon, 13 Mar 2023 07:34:39 -0700 (PDT) Received: from localhost (127.0.0.1) (HELO v370.home.net.pl) by /usr/run/smtp (/usr/run/postfix/private/idea_relay_lmtp) via UNIX with SMTP (IdeaSmtpServer 5.1.0) id 16fd6ca9926dc160; Mon, 13 Mar 2023 15:34:38 +0100 Received: from kreacher.localnet (unknown [213.134.189.11]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by v370.home.net.pl (Postfix) with ESMTPSA id 71A469C5854; Mon, 13 Mar 2023 15:34:37 +0100 (CET) From: "Rafael J. Wysocki" To: Linux PM Cc: Zhang Rui , Linux ACPI , LKML , Daniel Lezcano , Srinivas Pandruvada , Viresh Kumar , Quanxian Wang Subject: [PATCH v2 1/4] ACPI: processor: Reorder acpi_processor_driver_init() Date: Mon, 13 Mar 2023 15:27:03 +0100 Message-ID: <5934791.lOV4Wx5bFT@kreacher> In-Reply-To: <2692681.mvXUDI8C0e@kreacher> References: <2692681.mvXUDI8C0e@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 213.134.189.11 X-CLIENT-HOSTNAME: 213.134.189.11 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvhedrvddvgedgieegucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecujffqoffgrffnpdggtffipffknecuuegrihhlohhuthemucduhedtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkfgjfhgggfgtsehtufertddttdejnecuhfhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqnecuggftrfgrthhtvghrnhepfeduudeutdeugfelffduieegiedtueefledvjeegffdttefhhffhtefhleejgfetnecuffhomhgrihhnpehkvghrnhgvlhdrohhrghenucfkphepvddufedrudefgedrudekledruddunecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvddufedrudefgedrudekledruddupdhhvghlohepkhhrvggrtghhvghrrdhlohgtrghlnhgvthdpmhgrihhlfhhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqpdhnsggprhgtphhtthhopeekpdhrtghpthhtoheplhhinhhugidqphhmsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprhhuihdriihhrghnghesihhnthgvlhdrtghomhdprhgtphhtthhopehlihhnuhigqdgrtghpihesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghr rdhkvghrnhgvlhdrohhrghdprhgtphhtthhopegurghnihgvlhdrlhgviigtrghnoheslhhinhgrrhhordhorhhgpdhrtghpthhtohepshhrihhnihhvrghsrdhprghnughruhhvrggurgeslhhinhhugidrihhnthgvlhdrtghomh X-DCC--Metrics: v370.home.net.pl 1024; Body=8 Fuz1=8 Fuz2=8 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Rafael J. Wysocki The cpufreq policy notifier in the ACPI processor driver may as well be registered before the driver itself, which causes acpi_processor_cpufreq_init to be true (unless the notifier registration fails, which is unlikely at that point) when the ACPI CPU thermal cooling devices are registered, so the processor_get_max_state() result does not change while acpi_processor_driver_init() is running. Change the ordering in acpi_processor_driver_init() accordingly to prevent the max_state value from remaining 0 permanently for all ACPI CPU cooling devices due to setting acpi_processor_cpufreq_init too late. [Note that processor_get_max_state() may still return different values at different times after this change, depending on the cpufreq driver registration time, but that issue needs to be addressed separately.] Fixes: a365105c685c("thermal: sysfs: Reuse cdev->max_state") Reported-by: Wang, Quanxian Link: https://lore.kernel.org/linux-pm/53ec1f06f61c984100868926f282647e57ecfb2d.camel@intel.com/ Signed-off-by: Rafael J. Wysocki Tested-by: Zhang Rui Reviewed-by: Zhang Rui --- v1 -> v2: Expand changelog to explain that this particular patch addresses part of the issue. --- drivers/acpi/processor_driver.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) Index: linux-pm/drivers/acpi/processor_driver.c =================================================================== --- linux-pm.orig/drivers/acpi/processor_driver.c +++ linux-pm/drivers/acpi/processor_driver.c @@ -263,6 +263,12 @@ static int __init acpi_processor_driver_ if (acpi_disabled) return 0; + if (!cpufreq_register_notifier(&acpi_processor_notifier_block, + CPUFREQ_POLICY_NOTIFIER)) { + acpi_processor_cpufreq_init = true; + acpi_processor_ignore_ppc_init(); + } + result = driver_register(&acpi_processor_driver); if (result < 0) return result; @@ -276,12 +282,6 @@ static int __init acpi_processor_driver_ cpuhp_setup_state_nocalls(CPUHP_ACPI_CPUDRV_DEAD, "acpi/cpu-drv:dead", NULL, acpi_soft_cpu_dead); - if (!cpufreq_register_notifier(&acpi_processor_notifier_block, - CPUFREQ_POLICY_NOTIFIER)) { - acpi_processor_cpufreq_init = true; - acpi_processor_ignore_ppc_init(); - } - acpi_processor_throttling_init(); return 0; err: From patchwork Mon Mar 13 14:28:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 13172598 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 AD726C7618B for ; Mon, 13 Mar 2023 14:34:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231465AbjCMOe6 (ORCPT ); Mon, 13 Mar 2023 10:34:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231441AbjCMOej (ORCPT ); Mon, 13 Mar 2023 10:34:39 -0400 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6959B234D6; Mon, 13 Mar 2023 07:34:38 -0700 (PDT) Received: from localhost (127.0.0.1) (HELO v370.home.net.pl) by /usr/run/smtp (/usr/run/postfix/private/idea_relay_lmtp) via UNIX with SMTP (IdeaSmtpServer 5.1.0) id 59da252f0a8029b0; Mon, 13 Mar 2023 15:34:36 +0100 Received: from kreacher.localnet (unknown [213.134.189.11]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by v370.home.net.pl (Postfix) with ESMTPSA id 082459C5854; Mon, 13 Mar 2023 15:34:35 +0100 (CET) From: "Rafael J. Wysocki" To: Linux PM Cc: Zhang Rui , Linux ACPI , LKML , Daniel Lezcano , Srinivas Pandruvada , Viresh Kumar , Quanxian Wang Subject: [PATCH v2 2/4] thermal: core: Introduce thermal_cooling_device_present() Date: Mon, 13 Mar 2023 15:28:08 +0100 Message-ID: <4488488.LvFx2qVVIh@kreacher> In-Reply-To: <2692681.mvXUDI8C0e@kreacher> References: <2692681.mvXUDI8C0e@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 213.134.189.11 X-CLIENT-HOSTNAME: 213.134.189.11 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvhedrvddvgedgieegucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecujffqoffgrffnpdggtffipffknecuuegrihhlohhuthemucduhedtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkfgjfhgggfgtsehtufertddttdejnecuhfhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqnecuggftrfgrthhtvghrnhepvdffueeitdfgvddtudegueejtdffteetgeefkeffvdeftddttdeuhfegfedvjefhnecukfhppedvudefrddufeegrddukeelrdduudenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpedvudefrddufeegrddukeelrdduuddphhgvlhhopehkrhgvrggthhgvrhdrlhhotggrlhhnvghtpdhmrghilhhfrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqedpnhgspghrtghpthhtohepkedprhgtphhtthhopehlihhnuhigqdhpmhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehruhhirdiihhgrnhhgsehinhhtvghlrdgtohhmpdhrtghpthhtoheplhhinhhugidqrggtphhisehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtohep uggrnhhivghlrdhlvgiitggrnhhosehlihhnrghrohdrohhrghdprhgtphhtthhopehsrhhinhhivhgrshdrphgrnhgurhhuvhgruggrsehlihhnuhigrdhinhhtvghlrdgtohhm X-DCC--Metrics: v370.home.net.pl 1024; Body=8 Fuz1=8 Fuz2=8 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Rafael J. Wysocki Introduce a helper function, thermal_cooling_device_present(), for checking if the given cooling device is in the list of registered cooling devices to avoid some code duplication in a subsequent patch. No expected functional impact. Signed-off-by: Rafael J. Wysocki Tested-by: Zhang Rui Reviewed-by: Zhang Rui --- v1 -> v2: No changes --- drivers/thermal/thermal_core.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) Index: linux-pm/drivers/thermal/thermal_core.c =================================================================== --- linux-pm.orig/drivers/thermal/thermal_core.c +++ linux-pm/drivers/thermal/thermal_core.c @@ -1045,6 +1045,18 @@ devm_thermal_of_cooling_device_register( } EXPORT_SYMBOL_GPL(devm_thermal_of_cooling_device_register); +static bool thermal_cooling_device_present(struct thermal_cooling_device *cdev) +{ + struct thermal_cooling_device *pos = NULL; + + list_for_each_entry(pos, &thermal_cdev_list, node) { + if (pos == cdev) + return true; + } + + return false; +} + static void __unbind(struct thermal_zone_device *tz, int mask, struct thermal_cooling_device *cdev) { @@ -1067,20 +1079,17 @@ void thermal_cooling_device_unregister(s int i; const struct thermal_zone_params *tzp; struct thermal_zone_device *tz; - struct thermal_cooling_device *pos = NULL; if (!cdev) return; mutex_lock(&thermal_list_lock); - list_for_each_entry(pos, &thermal_cdev_list, node) - if (pos == cdev) - break; - if (pos != cdev) { - /* thermal cooling device not found */ + + if (!thermal_cooling_device_present(cdev)) { mutex_unlock(&thermal_list_lock); return; } + list_del(&cdev->node); /* Unbind all thermal zones associated with 'this' cdev */ From patchwork Mon Mar 13 14:32:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 13172595 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 617CAC74A4B for ; Mon, 13 Mar 2023 14:34:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229988AbjCMOek (ORCPT ); Mon, 13 Mar 2023 10:34:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49112 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231436AbjCMOej (ORCPT ); Mon, 13 Mar 2023 10:34:39 -0400 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F144B196B9; Mon, 13 Mar 2023 07:34:36 -0700 (PDT) Received: from localhost (127.0.0.1) (HELO v370.home.net.pl) by /usr/run/smtp (/usr/run/postfix/private/idea_relay_lmtp) via UNIX with SMTP (IdeaSmtpServer 5.1.0) id 0bedc2db18c9cec4; Mon, 13 Mar 2023 15:34:35 +0100 Received: from kreacher.localnet (unknown [213.134.189.11]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by v370.home.net.pl (Postfix) with ESMTPSA id 9DF529C5854; Mon, 13 Mar 2023 15:34:34 +0100 (CET) From: "Rafael J. Wysocki" To: Linux PM Cc: Zhang Rui , Linux ACPI , LKML , Daniel Lezcano , Srinivas Pandruvada , Viresh Kumar , Quanxian Wang Subject: [PATCH v2 3/4] thermal: core: Introduce thermal_cooling_device_update() Date: Mon, 13 Mar 2023 15:32:26 +0100 Message-ID: <2156873.irdbgypaU6@kreacher> In-Reply-To: <2692681.mvXUDI8C0e@kreacher> References: <2692681.mvXUDI8C0e@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 213.134.189.11 X-CLIENT-HOSTNAME: 213.134.189.11 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvhedrvddvgedgieegucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecujffqoffgrffnpdggtffipffknecuuegrihhlohhuthemucduhedtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkfgjfhgggfgtsehtufertddttdejnecuhfhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqnecuggftrfgrthhtvghrnhepfeduudeutdeugfelffduieegiedtueefledvjeegffdttefhhffhtefhleejgfetnecuffhomhgrihhnpehkvghrnhgvlhdrohhrghenucfkphepvddufedrudefgedrudekledruddunecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvddufedrudefgedrudekledruddupdhhvghlohepkhhrvggrtghhvghrrdhlohgtrghlnhgvthdpmhgrihhlfhhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqpdhnsggprhgtphhtthhopeekpdhrtghpthhtoheplhhinhhugidqphhmsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprhhuihdriihhrghnghesihhnthgvlhdrtghomhdprhgtphhtthhopehlihhnuhigqdgrtghpihesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghr rdhkvghrnhgvlhdrohhrghdprhgtphhtthhopegurghnihgvlhdrlhgviigtrghnoheslhhinhgrrhhordhorhhgpdhrtghpthhtohepshhrihhnihhvrghsrdhprghnughruhhvrggurgeslhhinhhugidrihhnthgvlhdrtghomh X-DCC--Metrics: v370.home.net.pl 1024; Body=8 Fuz1=8 Fuz2=8 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Rafael J. Wysocki Introduce a core thermal API function, thermal_cooling_device_update(), for updating the max_state value for a cooling device and rearranging its statistics in sysfs after a possible change of its ->get_max_state() callback return value. That callback is now invoked only once, during cooling device registration, to populate the max_state field in the cooling device object, so if its return value changes, it needs to be invoked again and the new return value needs to be stored as max_state. Moreover, the statistics presented in sysfs need to be rearranged in general, because there may not be enough room in them to store data for all of the possible states (in the case when max_state grows). The new function takes care of that (and some other minor things related to it), but some extra locking and lockdep annotations are added in several places too to protect against crashes in the cases when the statistics are not present or when a stale max_state value might be used by sysfs attributes. Note that the actual user of the new function will be added separately. Link: https://lore.kernel.org/linux-pm/53ec1f06f61c984100868926f282647e57ecfb2d.camel@intel.com/ Signed-off-by: Rafael J. Wysocki Tested-by: Zhang Rui Reviewed-by: Zhang Rui --- v1 -> v2: * Make thermal_cooling_device_update() do the full IS_ERR_OR_NULL() check on cdev, so that its callers don't need to do it. * Remove ->set_cur_state() callback invocation from thermal_cooling_device_update(), because it is redundant (and it doesn't make sense to pass a state value exceeding max_state to it anyway). --- drivers/thermal/thermal_core.c | 40 ++++++++++++++++++++++ drivers/thermal/thermal_core.h | 1 drivers/thermal/thermal_sysfs.c | 72 +++++++++++++++++++++++++++++++++++----- include/linux/thermal.h | 1 4 files changed, 106 insertions(+), 8 deletions(-) Index: linux-pm/drivers/thermal/thermal_core.c =================================================================== --- linux-pm.orig/drivers/thermal/thermal_core.c +++ linux-pm/drivers/thermal/thermal_core.c @@ -1057,6 +1057,46 @@ static bool thermal_cooling_device_prese return false; } +void thermal_cooling_device_update(struct thermal_cooling_device *cdev) +{ + unsigned long state; + + if (IS_ERR_OR_NULL(cdev)) + return; + + /* + * Hold thermal_list_lock throughout the update to prevent the device + * from going away while being updated. + */ + mutex_lock(&thermal_list_lock); + + if (!thermal_cooling_device_present(cdev)) + goto unlock_list; + + /* + * Update under the cdev lock to prevent the state from being set beyond + * the new limit concurrently. + */ + mutex_lock(&cdev->lock); + + if (cdev->ops->get_max_state(cdev, &cdev->max_state)) + goto unlock; + + thermal_cooling_device_stats_reinit(cdev); + + if (cdev->ops->get_cur_state(cdev, &state) || state > cdev->max_state) + goto unlock; + + thermal_cooling_device_stats_update(cdev, state); + +unlock: + mutex_unlock(&cdev->lock); + +unlock_list: + mutex_unlock(&thermal_list_lock); +} +EXPORT_SYMBOL_GPL(thermal_cooling_device_update); + static void __unbind(struct thermal_zone_device *tz, int mask, struct thermal_cooling_device *cdev) { Index: linux-pm/drivers/thermal/thermal_sysfs.c =================================================================== --- linux-pm.orig/drivers/thermal/thermal_sysfs.c +++ linux-pm/drivers/thermal/thermal_sysfs.c @@ -685,6 +685,8 @@ void thermal_cooling_device_stats_update { struct cooling_dev_stats *stats = cdev->stats; + lockdep_assert_held(&cdev->lock); + if (!stats) return; @@ -706,13 +708,22 @@ static ssize_t total_trans_show(struct d struct device_attribute *attr, char *buf) { struct thermal_cooling_device *cdev = to_cooling_device(dev); - struct cooling_dev_stats *stats = cdev->stats; + struct cooling_dev_stats *stats; int ret; + mutex_lock(&cdev->lock); + + stats = cdev->stats; + if (!stats) + goto unlock; + spin_lock(&stats->lock); ret = sprintf(buf, "%u\n", stats->total_trans); spin_unlock(&stats->lock); +unlock: + mutex_unlock(&cdev->lock); + return ret; } @@ -721,11 +732,18 @@ time_in_state_ms_show(struct device *dev char *buf) { struct thermal_cooling_device *cdev = to_cooling_device(dev); - struct cooling_dev_stats *stats = cdev->stats; + struct cooling_dev_stats *stats; ssize_t len = 0; int i; + mutex_lock(&cdev->lock); + + stats = cdev->stats; + if (!stats) + goto unlock; + spin_lock(&stats->lock); + update_time_in_state(stats); for (i = 0; i <= cdev->max_state; i++) { @@ -734,6 +752,9 @@ time_in_state_ms_show(struct device *dev } spin_unlock(&stats->lock); +unlock: + mutex_unlock(&cdev->lock); + return len; } @@ -742,8 +763,16 @@ reset_store(struct device *dev, struct d size_t count) { struct thermal_cooling_device *cdev = to_cooling_device(dev); - struct cooling_dev_stats *stats = cdev->stats; - int i, states = cdev->max_state + 1; + struct cooling_dev_stats *stats; + int i, states; + + mutex_lock(&cdev->lock); + + stats = cdev->stats; + if (!stats) + goto unlock; + + states = cdev->max_state + 1; spin_lock(&stats->lock); @@ -757,6 +786,9 @@ reset_store(struct device *dev, struct d spin_unlock(&stats->lock); +unlock: + mutex_unlock(&cdev->lock); + return count; } @@ -764,10 +796,18 @@ static ssize_t trans_table_show(struct d struct device_attribute *attr, char *buf) { struct thermal_cooling_device *cdev = to_cooling_device(dev); - struct cooling_dev_stats *stats = cdev->stats; + struct cooling_dev_stats *stats; ssize_t len = 0; int i, j; + mutex_lock(&cdev->lock); + + stats = cdev->stats; + if (!stats) { + len = -ENODATA; + goto unlock; + } + len += snprintf(buf + len, PAGE_SIZE - len, " From : To\n"); len += snprintf(buf + len, PAGE_SIZE - len, " : "); for (i = 0; i <= cdev->max_state; i++) { @@ -775,8 +815,10 @@ static ssize_t trans_table_show(struct d break; len += snprintf(buf + len, PAGE_SIZE - len, "state%2u ", i); } - if (len >= PAGE_SIZE) - return PAGE_SIZE; + if (len >= PAGE_SIZE) { + len = PAGE_SIZE; + goto unlock; + } len += snprintf(buf + len, PAGE_SIZE - len, "\n"); @@ -799,8 +841,12 @@ static ssize_t trans_table_show(struct d if (len >= PAGE_SIZE) { pr_warn_once("Thermal transition table exceeds PAGE_SIZE. Disabling\n"); - return -EFBIG; + len = -EFBIG; } + +unlock: + mutex_unlock(&cdev->lock); + return len; } @@ -830,6 +876,8 @@ static void cooling_device_stats_setup(s unsigned long states = cdev->max_state + 1; int var; + lockdep_assert_held(&cdev->lock); + var = sizeof(*stats); var += sizeof(*stats->time_in_state) * states; var += sizeof(*stats->trans_table) * states * states; @@ -855,6 +903,8 @@ out: static void cooling_device_stats_destroy(struct thermal_cooling_device *cdev) { + lockdep_assert_held(&cdev->lock); + kfree(cdev->stats); cdev->stats = NULL; } @@ -879,6 +929,12 @@ void thermal_cooling_device_destroy_sysf cooling_device_stats_destroy(cdev); } +void thermal_cooling_device_stats_reinit(struct thermal_cooling_device *cdev) +{ + cooling_device_stats_destroy(cdev); + cooling_device_stats_setup(cdev); +} + /* these helper will be used only at the time of bindig */ ssize_t trip_point_show(struct device *dev, struct device_attribute *attr, char *buf) Index: linux-pm/drivers/thermal/thermal_core.h =================================================================== --- linux-pm.orig/drivers/thermal/thermal_core.h +++ linux-pm/drivers/thermal/thermal_core.h @@ -127,6 +127,7 @@ int thermal_zone_create_device_groups(st void thermal_zone_destroy_device_groups(struct thermal_zone_device *); void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *); void thermal_cooling_device_destroy_sysfs(struct thermal_cooling_device *cdev); +void thermal_cooling_device_stats_reinit(struct thermal_cooling_device *cdev); /* used only at binding time */ ssize_t trip_point_show(struct device *, struct device_attribute *, char *); ssize_t weight_show(struct device *, struct device_attribute *, char *); Index: linux-pm/include/linux/thermal.h =================================================================== --- linux-pm.orig/include/linux/thermal.h +++ linux-pm/include/linux/thermal.h @@ -388,6 +388,7 @@ devm_thermal_of_cooling_device_register( struct device_node *np, char *type, void *devdata, const struct thermal_cooling_device_ops *ops); +void thermal_cooling_device_update(struct thermal_cooling_device *); void thermal_cooling_device_unregister(struct thermal_cooling_device *); struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name); int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp); From patchwork Mon Mar 13 14:34:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 13172594 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 76412C61DA4 for ; Mon, 13 Mar 2023 14:34:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231410AbjCMOei (ORCPT ); Mon, 13 Mar 2023 10:34:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49102 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231404AbjCMOeh (ORCPT ); Mon, 13 Mar 2023 10:34:37 -0400 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6B372234D6; Mon, 13 Mar 2023 07:34:36 -0700 (PDT) Received: from localhost (127.0.0.1) (HELO v370.home.net.pl) by /usr/run/smtp (/usr/run/postfix/private/idea_relay_lmtp) via UNIX with SMTP (IdeaSmtpServer 5.1.0) id 3f128afb96eb52b3; Mon, 13 Mar 2023 15:34:34 +0100 Received: from kreacher.localnet (unknown [213.134.189.11]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by v370.home.net.pl (Postfix) with ESMTPSA id 1A31E9C5854; Mon, 13 Mar 2023 15:34:33 +0100 (CET) From: "Rafael J. Wysocki" To: Linux PM Cc: Zhang Rui , Linux ACPI , LKML , Daniel Lezcano , Srinivas Pandruvada , Viresh Kumar , Quanxian Wang Subject: [PATCH v2 4/4] ACPI: processor: thermal: Update CPU cooling devices on cpufreq policy changes Date: Mon, 13 Mar 2023 15:34:27 +0100 Message-ID: <2893417.e9J7NaK4W3@kreacher> In-Reply-To: <2692681.mvXUDI8C0e@kreacher> References: <2692681.mvXUDI8C0e@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 213.134.189.11 X-CLIENT-HOSTNAME: 213.134.189.11 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvhedrvddvgedgieegucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecujffqoffgrffnpdggtffipffknecuuegrihhlohhuthemucduhedtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkfgjfhgggfgtsehtufertddttdejnecuhfhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqnecuggftrfgrthhtvghrnhepfeduudeutdeugfelffduieegiedtueefledvjeegffdttefhhffhtefhleejgfetnecuffhomhgrihhnpehkvghrnhgvlhdrohhrghenucfkphepvddufedrudefgedrudekledruddunecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvddufedrudefgedrudekledruddupdhhvghlohepkhhrvggrtghhvghrrdhlohgtrghlnhgvthdpmhgrihhlfhhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqpdhnsggprhgtphhtthhopeekpdhrtghpthhtoheplhhinhhugidqphhmsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprhhuihdriihhrghnghesihhnthgvlhdrtghomhdprhgtphhtthhopehlihhnuhigqdgrtghpihesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghr rdhkvghrnhgvlhdrohhrghdprhgtphhtthhopegurghnihgvlhdrlhgviigtrghnoheslhhinhgrrhhordhorhhgpdhrtghpthhtohepshhrihhnihhvrghsrdhprghnughruhhvrggurgeslhhinhhugidrihhnthgvlhdrtghomh X-DCC--Metrics: v370.home.net.pl 1024; Body=8 Fuz1=8 Fuz2=8 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Rafael J. Wysocki When a cpufreq policy appears or goes away, the CPU cooling devices for the CPUs covered by that policy need to be updated so that the new processor_get_max_state() value is stored as max_state and the statistics in sysfs are rearranged for each of them. Do that accordingly in acpi_thermal_cpufreq_init() and acpi_thermal_cpufreq_exit(). Fixes: a365105c685c("thermal: sysfs: Reuse cdev->max_state") Reported-by: Wang, Quanxian Link: https://lore.kernel.org/linux-pm/53ec1f06f61c984100868926f282647e57ecfb2d.camel@intel.com/ Signed-off-by: Rafael J. Wysocki Tested-by: Zhang Rui Reviewed-by: Zhang Rui --- v1 -> v2: Remove the now redundant IS_ERR() checks on cdev before calling thermal_cooling_device_update(). --- drivers/acpi/processor_thermal.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) Index: linux-pm/drivers/acpi/processor_thermal.c =================================================================== --- linux-pm.orig/drivers/acpi/processor_thermal.c +++ linux-pm/drivers/acpi/processor_thermal.c @@ -140,9 +140,13 @@ void acpi_thermal_cpufreq_init(struct cp ret = freq_qos_add_request(&policy->constraints, &pr->thermal_req, FREQ_QOS_MAX, INT_MAX); - if (ret < 0) + if (ret < 0) { pr_err("Failed to add freq constraint for CPU%d (%d)\n", cpu, ret); + continue; + } + + thermal_cooling_device_update(pr->cdev); } } @@ -153,8 +157,12 @@ void acpi_thermal_cpufreq_exit(struct cp for_each_cpu(cpu, policy->related_cpus) { struct acpi_processor *pr = per_cpu(processors, cpu); - if (pr) - freq_qos_remove_request(&pr->thermal_req); + if (!pr) + continue; + + freq_qos_remove_request(&pr->thermal_req); + + thermal_cooling_device_update(pr->cdev); } } #else /* ! CONFIG_CPU_FREQ */