From nobody Mon Dec 15 21:48:49 2025 Received: from NAM10-MW2-obe.outbound.protection.outlook.com (mail-mw2nam10on2056.outbound.protection.outlook.com [40.107.94.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8DECC22CBEC; Wed, 5 Feb 2025 11:28:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.94.56 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738754923; cv=fail; b=c9/9wOp6w8JXHKd1ari2OywBNQKORWvCX4MeVKt3RpFvzxyZTIBn5xPRjkRJ42gdx4wqEuhiK0tBQe0aStzCPt1hFEyqiQ9UyRoAkWQvTh+MBSAAVRWsQKjtPZGiZnT6uB5y2cHV/N6doLy9FOHdUQl6ED3tEBpBjzbUvLzIl9A= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738754923; c=relaxed/simple; bh=dG6h0ZhiyW4zZDfibagNWPFupt1FSF6lhdL2bC2/JqU=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=D5G9IRrMXeYq1xU23hcUtMowXOWA1cCECdpoP0dEB0xaMgb83Tn4964t6gUjAyT/85rFXQh41g2zdf1sgi9JRMLsehN4db/Rn1eOI1a21l/enMvbgBo6IKHo9QGCRXVXO2pb4Hn8ZOgTECykYkEXdfbwZj35h/1A1JbKRIrGX4U= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=eAbJITiG; arc=fail smtp.client-ip=40.107.94.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="eAbJITiG" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=hDPo8vHfA8FUkp+KQoir31WmuSMpE8RIdBMLXprfAWa2S1JLJPkW4HxYzk9TisCFMnzuO1NBcV8NK1a6FJPgGpYaJXjWkxHIwRGXRY/B9Kl1GOQdzKJTtPbYP0TGjsJ79K/wmVgZVr45IpBh8BS/TkwBv9qSyt317OS8G2yHjO2T8eTPjpolaTWLK5JFrmroGZCClRAG9rOziJZSPufpuo+K92WJTABJ1kGowbBTbn75CRHXHNHoycXVx2aONCNgZs0yXzm+pzknXKrQW0JIPpRMhZy6Z4JJquvCHnpIA9CgGHtA/hpHVHmP40tqw9ey+NRQ0uJiZqWQjlEod+r1hw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=FrKzhYJ2s1I81LO4d2M4m2UJknIyrCxOljqyby/50po=; b=Z7HUz2NQ3ppVsB+yJFim0q0bAZoTZTa/fIM1DIyKGk68LZ/fU9UB9dZP6RU/Uh2uCMxXXNzQeAd8XjCJLUUGOk7P21/RtyMbOLH2VPevhWBatdmNNunogUVg85aeAvsrVNIxPYsFWJgJnAPcAapffbu2A6g38AMdbUvUPX8I6TFL15ENl3yzJ5zSFcUKeoeidXPJoGGjonUsDj03WH3Da+sXckRACYHBoNr1+u5sb8MB3HJRltcT7tA+ceUziUx2R2zbYVziUCslFSncKw2N8evUW+8/j99S03IdiIgGrsE9w0ga5jeReqg/JfSVu76K+t1iWwex3LWLIQqxT1LtTw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=kernel.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=FrKzhYJ2s1I81LO4d2M4m2UJknIyrCxOljqyby/50po=; b=eAbJITiGB6mD+aA873jMg+si/THsF9BGIPzi7FOPX5DnNRYmOWcauuVtkm38ilXhYFgr28yn3uueGXHMTvZaZuIztKvrxR+5AYkPvla2heLFZLAusQ//M65MdBx824/CcmURHGVRwIH2pQW28TiCuiDmaV1nZ2Y6233gbHMUdh0= Received: from MN2PR13CA0023.namprd13.prod.outlook.com (2603:10b6:208:160::36) by DM6PR12MB4339.namprd12.prod.outlook.com (2603:10b6:5:2af::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8398.24; Wed, 5 Feb 2025 11:28:38 +0000 Received: from BL02EPF0001A103.namprd05.prod.outlook.com (2603:10b6:208:160:cafe::53) by MN2PR13CA0023.outlook.office365.com (2603:10b6:208:160::36) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8398.25 via Frontend Transport; Wed, 5 Feb 2025 11:28:38 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BL02EPF0001A103.mail.protection.outlook.com (10.167.241.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8398.14 via Frontend Transport; Wed, 5 Feb 2025 11:28:38 +0000 Received: from shatadru.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; Wed, 5 Feb 2025 05:28:34 -0600 From: Dhananjay Ugwekar To: , , , CC: , , "Dhananjay Ugwekar" Subject: [PATCH 11/12] cpufreq/amd-pstate: Use scope based cleanup for cpufreq_policy refs Date: Wed, 5 Feb 2025 11:25:22 +0000 Message-ID: <20250205112523.201101-12-dhananjay.ugwekar@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250205112523.201101-1-dhananjay.ugwekar@amd.com> References: <20250205112523.201101-1-dhananjay.ugwekar@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A103:EE_|DM6PR12MB4339:EE_ X-MS-Office365-Filtering-Correlation-Id: 40531d0f-faef-44b4-3931-08dd45d83c28 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|1800799024|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?GQksj0Xz5V2XLx10Xjh3EqK/6OwOuOSmTowUKY9SqTEmr4znuEPjCAp8xrdY?= =?us-ascii?Q?63OzEnvlzRRXPTmnKOPSJElF6j7Oo+HH1hzn0vhIdAwPs86LDqipTJkPwJky?= =?us-ascii?Q?GCiFqKqhUrmOOtfkNEZSiPeT5960cGem0pkLxyrAMZZBxEA1ZliiCii3BKiJ?= =?us-ascii?Q?pdp7ItWSSi8BDnnocCXdOwq5nsvVJLJuPkh+HTERXUkok5yY6rrhEmsGNm8z?= =?us-ascii?Q?qxqWynf5qgzmmYdrVobhVPuRkGRoIIyfsecpa45r/YiGtN9G6tEUuHBtBFnB?= =?us-ascii?Q?aDF/AKa6yoiJRfvc0TVYT0zQxGn2H1FwIPU0YA6NuFH7T1UNuZeNcq0Q5sHl?= =?us-ascii?Q?pVI6GxaEpyNjhTEjv09Nr4a9Dauy1Dv7/1MBQzG3Yr1dlJd0c5uHlgYDFhnD?= =?us-ascii?Q?LMrDYdmXhWQYAgOKHtgEyRIAdM/njEsPdnGTqQ/bpTkgCFeqanwXrFScr+vI?= =?us-ascii?Q?9kTV/yg0BawrHcRrEPCIxAoAwVxt9NCzcGOMXWV49p/pLnuVimTri9uz1z7w?= =?us-ascii?Q?OwyKGPfIXkT1+6t+9f3X7lJUR55kleLz8K3o0Epym/J+XhYReFe88kH9b6ya?= =?us-ascii?Q?kNXxt3grEuPu5uceR/JZizu1nVh6yM+OZGL/RQpp9nP16bdpFqSvRbygo308?= =?us-ascii?Q?/iMnIqdgpRHjCSQpjEdm3a0zTBnuKbdozF4HWTm7GMLLhmnsTDjeRRj5YsMi?= =?us-ascii?Q?8kzfgOlIQqlL+WXKUTJzdaN3oQSRFulzyzLctPYdD6I/2vVeXbkSloJ71g6p?= =?us-ascii?Q?wYIy9UKrudzhs1gQOisHEghxWF2ySx4zDvex1BPTw/RFPH03yFu6ODy6eKzg?= =?us-ascii?Q?RE3Hui7kx+yHPQPqMmDRFw/L1GQVzUP6ibpRi1GxH8JONI4XefpRtAakv2J0?= =?us-ascii?Q?O9w9Olu68QVaIOTO2/dPR4b7pqX3acIzseIw8Efr8lLBQ9PWbqLzLxMJ6yFi?= =?us-ascii?Q?bqKNbwrX8X0ueFxcC9NwAKpwY5q9IJxyN8ZejElMQXS3KQpOS3Ji2vm39Z+L?= =?us-ascii?Q?3BoORXwEtPzEjz8jWOysdmGkQq67p32STLjMJSYH8v79nyBr0XZGXAFrgXNz?= =?us-ascii?Q?XbeWuvJ68qp5fl8XfwBIDtwtATfe0DBXxka2qIjvIQlLm5jenLS/4WxErW6U?= =?us-ascii?Q?bE8Oh3+Zw7EVYAH0ie+NDweAQy297XKl+4ZM8DZQcc7w64+oQVGVMVGF9YsO?= =?us-ascii?Q?EZ8UEFOs8PrQmMJWwnb/EDodpg8Rot4LqdsgS3rSumpc6xLAqCDYWIgUYBOI?= =?us-ascii?Q?SZQH9K8khByP4n+IfQz/7UCVPx6He2HwPXDxgmzwpFXWn+bCU3iSkhypyvMl?= =?us-ascii?Q?GdKbWG8b9gL9zIgK5AQVcG8iu7rdDQ2cMBswny8Oh0OmFW/0n/1xuHDHLK+1?= =?us-ascii?Q?cLkAGDJU7uNgWhkB/BoJtHJ4i2Zt9cQpSZqAQM3ixj6zmts1xQhBr9aukIOc?= =?us-ascii?Q?PWgYvISCvqtRBcdBq/gHIp+xBtv8ztj9NkzLJ10NMti8vDoKgNhJ/NHYMZn4?= =?us-ascii?Q?i3It74a+9EvqxDA=3D?= 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)(82310400026)(1800799024)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Feb 2025 11:28:38.0374 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 40531d0f-faef-44b4-3931-08dd45d83c28 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: BL02EPF0001A103.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4339 Content-Type: text/plain; charset="utf-8" There have been instances in past where refcount decrementing is missed while exiting a function. Use automatic scope based cleanup to avoid such errors. Signed-off-by: Dhananjay Ugwekar Reviewed-by: Gautham R. Shenoy Reviewed-by: Mario Limonciello --- drivers/cpufreq/amd-pstate.c | 25 ++++++++----------------- include/linux/cpufreq.h | 3 +++ 2 files changed, 11 insertions(+), 17 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 6a604f0797d9..ee7e3f0a4c0a 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -548,7 +548,7 @@ static inline bool amd_pstate_sample(struct amd_cpudata= *cpudata) static void amd_pstate_update(struct amd_cpudata *cpudata, u8 min_perf, u8 des_perf, u8 max_perf, bool fast_switch, int gov_flags) { - struct cpufreq_policy *policy =3D cpufreq_cpu_get(cpudata->cpu); + struct cpufreq_policy *policy __free(put_cpufreq_policy) =3D cpufreq_cpu_= get(cpudata->cpu); u8 nominal_perf =3D READ_ONCE(cpudata->nominal_perf); =20 if (!policy) @@ -574,8 +574,6 @@ static void amd_pstate_update(struct amd_cpudata *cpuda= ta, u8 min_perf, } =20 amd_pstate_update_perf(cpudata, min_perf, des_perf, max_perf, 0, fast_swi= tch); - - cpufreq_cpu_put(policy); } =20 static int amd_pstate_verify(struct cpufreq_policy_data *policy_data) @@ -587,7 +585,8 @@ static int amd_pstate_verify(struct cpufreq_policy_data= *policy_data) * amd-pstate qos_requests. */ if (policy_data->min =3D=3D FREQ_QOS_MIN_DEFAULT_VALUE) { - struct cpufreq_policy *policy =3D cpufreq_cpu_get(policy_data->cpu); + struct cpufreq_policy *policy __free(put_cpufreq_policy) =3D + cpufreq_cpu_get(policy_data->cpu); struct amd_cpudata *cpudata; =20 if (!policy) @@ -595,7 +594,6 @@ static int amd_pstate_verify(struct cpufreq_policy_data= *policy_data) =20 cpudata =3D policy->driver_data; policy_data->min =3D cpudata->lowest_nonlinear_freq; - cpufreq_cpu_put(policy); } =20 cpufreq_verify_within_cpu_limits(policy_data); @@ -678,7 +676,7 @@ static void amd_pstate_adjust_perf(unsigned int cpu, unsigned long capacity) { u8 max_perf, min_perf, des_perf, cap_perf, min_limit_perf; - struct cpufreq_policy *policy =3D cpufreq_cpu_get(cpu); + struct cpufreq_policy *policy __free(put_cpufreq_policy) =3D cpufreq_cpu_= get(cpu); struct amd_cpudata *cpudata; =20 if (!policy) @@ -710,7 +708,6 @@ static void amd_pstate_adjust_perf(unsigned int cpu, =20 amd_pstate_update(cpudata, min_perf, des_perf, max_perf, true, policy->governor->flags); - cpufreq_cpu_put(policy); } =20 static int amd_pstate_cpu_boost_update(struct cpufreq_policy *policy, bool= on) @@ -824,28 +821,23 @@ static void amd_pstate_init_prefcore(struct amd_cpuda= ta *cpudata) =20 static void amd_pstate_update_limits(unsigned int cpu) { - struct cpufreq_policy *policy =3D NULL; + struct cpufreq_policy *policy __free(put_cpufreq_policy) =3D cpufreq_cpu_= get(cpu); struct amd_cpudata *cpudata; u32 prev_high =3D 0, cur_high =3D 0; - int ret; bool highest_perf_changed =3D false; =20 if (!amd_pstate_prefcore) return; =20 - policy =3D cpufreq_cpu_get(cpu); if (!policy) return; =20 - cpudata =3D policy->driver_data; - guard(mutex)(&amd_pstate_driver_lock); =20 - ret =3D amd_get_highest_perf(cpu, &cur_high); - if (ret) { - cpufreq_cpu_put(policy); + if (amd_get_highest_perf(cpu, &cur_high)) return; - } + + cpudata =3D policy->driver_data; =20 prev_high =3D READ_ONCE(cpudata->prefcore_ranking); highest_perf_changed =3D (prev_high !=3D cur_high); @@ -855,7 +847,6 @@ static void amd_pstate_update_limits(unsigned int cpu) if (cur_high < CPPC_MAX_PERF) sched_set_itmt_core_prio((int)cur_high, cpu); } - cpufreq_cpu_put(policy); } =20 /* diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 7fe0981a7e46..dde5212d256c 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -210,6 +210,9 @@ static inline struct cpufreq_policy *cpufreq_cpu_get(un= signed int cpu) static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } #endif =20 +/* Scope based cleanup macro for cpufreq_policy kobject reference counting= */ +DEFINE_FREE(put_cpufreq_policy, struct cpufreq_policy *, if (_T) cpufreq_c= pu_put(_T)) + static inline bool policy_is_inactive(struct cpufreq_policy *policy) { return cpumask_empty(policy->cpus); --=20 2.34.1