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client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CH1PEPF0000AD7B.mail.protection.outlook.com (10.167.244.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8230.7 via Frontend Transport; Mon, 2 Dec 2024 05:52:05 +0000 Received: from AUS-P9-MLIMONCI.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Sun, 1 Dec 2024 23:52:03 -0600 From: Mario Limonciello To: Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= CC: "Rafael J . Wysocki" , Len Brown , Maximilian Luz , Lee Chun-Yi , "Shyam Sundar S K" , Corentin Chary , "Luke D . Jones" , Ike Panhc , Henrique de Moraes Holschuh , "Alexis Belmonte" , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Ai Chao , Gergo Koteles , open list , "open list:ACPI" , "open list:MICROSOFT SURFACE PLATFORM PROFILE DRIVER" , "open list:THINKPAD ACPI EXTRAS DRIVER" , Mark Pearson , Matthew Schwartz , Mario Limonciello , Armin Wolf Subject: [PATCH v9 20/22] ACPI: platform_profile: Allow multiple handlers Date: Sun, 1 Dec 2024 23:50:29 -0600 Message-ID: <20241202055031.8038-21-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241202055031.8038-1-mario.limonciello@amd.com> References: <20241202055031.8038-1-mario.limonciello@amd.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH1PEPF0000AD7B:EE_|MN6PR12MB8542:EE_ X-MS-Office365-Filtering-Correlation-Id: 4a0d80f8-4799-43f3-09ae-08dd129573d9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|82310400026|7416014|376014; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700013)(1800799024)(82310400026)(7416014)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Dec 2024 05:52:05.8727 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4a0d80f8-4799-43f3-09ae-08dd129573d9 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH1PEPF0000AD7B.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN6PR12MB8542 Multiple drivers may attempt to register platform profile handlers, but only one may be registered and the behavior is non-deterministic for which one wins. It's mostly controlled by probing order. This can be problematic if one driver changes CPU settings and another driver notifies the EC for changing fan curves. Modify the ACPI platform profile handler to let multiple drivers register platform profile handlers and abstract this detail from userspace. To avoid undefined behaviors only offer profiles that are commonly advertised across multiple handlers. If any problems occur when changing profiles for any driver, then the drivers that were already changed remain changed and the legacy sysfs handler will report 'custom'. Tested-by: Mark Pearson Tested-by: Matthew Schwartz Reviewed-by: Mark Pearson Reviewed-by: Armin Wolf Signed-off-by: Mario Limonciello Reviewed-by: Ilpo Järvinen --- drivers/acpi/platform_profile.c | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c index 289b5d43638ae..2e38aa410b3ad 100644 --- a/drivers/acpi/platform_profile.c +++ b/drivers/acpi/platform_profile.c @@ -10,7 +10,6 @@ #include #include -static struct platform_profile_handler *cur_profile; static DEFINE_MUTEX(profile_lock); static const char * const profile_names[] = { @@ -399,8 +398,6 @@ static const struct attribute_group platform_profile_group = { void platform_profile_notify(struct platform_profile_handler *pprof) { - if (!cur_profile) - return; scoped_cond_guard(mutex_intr, return, &profile_lock) { _notify_class_profile(pprof->class_dev, NULL); } @@ -463,9 +460,6 @@ int platform_profile_register(struct platform_profile_handler *pprof) } guard(mutex)(&profile_lock); - /* We can only have one active profile */ - if (cur_profile) - return -EEXIST; /* create class interface for individual handler */ pprof->minor = ida_alloc(&platform_profile_ida, GFP_KERNEL); @@ -481,8 +475,6 @@ int platform_profile_register(struct platform_profile_handler *pprof) sysfs_notify(acpi_kobj, NULL, "platform_profile"); - cur_profile = pprof; - err = sysfs_update_group(acpi_kobj, &platform_profile_group); if (err) goto cleanup_cur; @@ -490,7 +482,6 @@ int platform_profile_register(struct platform_profile_handler *pprof) return 0; cleanup_cur: - cur_profile = NULL; device_unregister(pprof->class_dev); cleanup_ida: @@ -505,8 +496,6 @@ int platform_profile_remove(struct platform_profile_handler *pprof) int id; guard(mutex)(&profile_lock); - cur_profile = NULL; - id = pprof->minor; device_unregister(pprof->class_dev); ida_free(&platform_profile_ida, id);