From patchwork Sun Jul 21 11:16:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 813620 Received: from mail-lf1-f41.google.com (mail-lf1-f41.google.com [209.85.167.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D77C942047 for ; Sun, 21 Jul 2024 11:16:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.41 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721560605; cv=none; b=hQr6Cx5mjjh/vRSe4jNQRLixC4hOus5L0Qyj+eEhmWUB3T5O0G1h0N5U3zKwDxuCo4SKVGUgiBqtET+sYoY5+Z1ZKGRVpxvJzp+0Z6UoZ2O/6ujOE6F4UrTYvAaJ9QUXopf+Dig11UplXJwPoEWzU108Fd2EtxQB4WxHNoJtsDw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721560605; c=relaxed/simple; bh=gSDr2qXiWunqD83kcCcfkWzmofL1UeyjfIsv5gb6YVw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=d1La/a/0bUOMf5wQ7i62XrEct2lWf+c2QIrpftq+SYQpbmZ2J2m4GR4lBgM5/mfEgdrHZrlv3FqRtRW19WY5A/Y2NlBQZgq733mZXVNjaSH6gNo10uUKE2jdyQbse6cv/x1p/79hLTARPuzmJ/UeKWgUL/FSxtxZ2tOki1Vd8FY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=tNwHKGIX; arc=none smtp.client-ip=209.85.167.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="tNwHKGIX" Received: by mail-lf1-f41.google.com with SMTP id 2adb3069b0e04-52e9a550e9fso2683481e87.0 for ; Sun, 21 Jul 2024 04:16:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1721560601; x=1722165401; darn=vger.kernel.org; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:from:to:cc:subject:date:message-id:reply-to; bh=kAUIBKUFiqHBE7OX0O7eWG2UC2nEpnjuYCzeR97fn5c=; b=tNwHKGIXQ6LBjtsoY4e4qSwmftmwP6EEArWld1e78O83YQB5Qxf9GQJXKc9zRurh9B CFET0OJVkf0t8P0FyoVCA4wj9dJNWciA/6hKKhLIbSnWdQvWxV8nRM+yO3z7m0+a0RIF sgLPFmg7CxIj1SBEwjrUL4sOwSwI4IMcIzLejxy9/qNzrEWTAxHnmvIiG9bMuvIqnegl rfwARI6GuK43XY27Sw8fSzM3hwiWiZxS2hN1m20sOXCz92sYKLzBJt8Hm4Ke3lv6/rxw hG18rIvUGJZhpAAlqZT4UU/Dj9voV9UOnmCS6WgNq4I67ZIaAJZvisNv7kAPgGgnvU2V 4JnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721560601; x=1722165401; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=kAUIBKUFiqHBE7OX0O7eWG2UC2nEpnjuYCzeR97fn5c=; b=Kku0ys74f+zb6/lzYEYYCZAPI+3cgqZh8oLxrry6v6f5PXuzcwi6CIduYCZjWTyoJv e9jyien0Yrhpp4Mt56OP8MKMNreb8b3mH5J3Wt9Q3qHG70vLYcmYh8Qmuc11q6c/Ge5q e4Fa1ZQhPpVjPYAZHL7K9ozo0S4qtwW/bytyY7AzxIG4xNXAxluXqSt29zBo/EVpIKWS 7TcwVI69a9pNIPgOS4q+BhiyV73mbnK+DZkmobEPMfSoqavwTyOxZq71jdzAwPCPbHRd 38n/8vbsDUn4k7vknpkKdsUz/DhRE0cxsjewUKJEv1BW28Tbgb0/GVXdHZT3ZbjIPWD4 azTQ== X-Forwarded-Encrypted: i=1; AJvYcCW0a99ZeKSUzjH/4YF+f3kU+Rwa2j288RpMD1WJhwpSiO/2te0dozv3lO4P7mQzCk3S38G6H9aHGZSnRm2NwhckPgfLp8Z3LMROEeMLCg== X-Gm-Message-State: AOJu0YzFynMpDDs89WXxDaxe7v5/BIE49ZaoEVCpmj7jiIx3Zr6b8/po 0gP2GYKvd3Pe3aIxhF93IkBS84QJfCyUkAQ5VKQLYBsd/m15ssw9ELqNt7pt0jY= X-Google-Smtp-Source: AGHT+IEY2idVUSGtat10CMxDBXzEMzhFrrDcQu9qRLhhVyj0rYaxZmSkj5WTR7wjcMw1NB1n7aTjHQ== X-Received: by 2002:a05:6512:695:b0:52c:8b11:80cf with SMTP id 2adb3069b0e04-52ef0702ae6mr2563685e87.8.1721560600793; Sun, 21 Jul 2024 04:16:40 -0700 (PDT) Received: from umbar.lan ([192.130.178.91]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-52ef5578506sm822451e87.295.2024.07.21.04.16.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Jul 2024 04:16:40 -0700 (PDT) From: Dmitry Baryshkov Date: Sun, 21 Jul 2024 14:16:39 +0300 Subject: [PATCH] thermal/drivers/qcom/lmh: remove false lockdep backtrace Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240721-lmh-lockdep-v1-1-c1bf919b442f@linaro.org> X-B4-Tracking: v=1; b=H4sIABbunGYC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIxMDcyND3ZzcDN2c/OTslNQCXQuLlFQDy1RzcwMLSyWgjoKi1LTMCrBp0bG 1tQCu+DtRXQAAAA== To: Amit Kucheria , Thara Gopinath , "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba Cc: Thara Gopinath , linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2582; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=gSDr2qXiWunqD83kcCcfkWzmofL1UeyjfIsv5gb6YVw=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBmnO4Xrovb9aqAuAdMv9r/yiaa+XQt85hSxSvkN S02LdJPRPWJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZpzuFwAKCRCLPIo+Aiko 1YMfB/96eLGyMclo0vwO45CrMn9SgiqDGn+AOGcUjdu+za39MOncl4XANqiLM2cTVTris9Gl34l 7za8lffSnrIkvl6bRqidLnmEyxiYVRIlSpQ8y6noxVxc1qNvIlWHNsMgqhwcZAPhHX7mlE2RHek 0qDm2RBTUVLKVwB6Gd2v/+e0L/vdaXJtvhgK79pTsox7pADYLJ12PRgKRnyV3PS9Wj8PzSrYc1I zDxLvuUfacsDKnP/mPihVrSZn234rj9tHVAFXf+i8IENO421BtfhRz/2meEsQ72X3ggVUAA9PE/ vFHWKoeBgIq9O27I9iWpRqLZ3AWQw/1eoHIRVIvpxaIKAaYK X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A Annotate LMH IRQs with lockdep classes so that the lockdep doesn't report possible recursive locking issue between LMH and GIC interrupts. For the reference: CPU0 ---- lock(&irq_desc_lock_class); lock(&irq_desc_lock_class); *** DEADLOCK *** Call trace: dump_backtrace+0x98/0xf0 show_stack+0x18/0x24 dump_stack_lvl+0x90/0xd0 dump_stack+0x18/0x24 print_deadlock_bug+0x258/0x348 __lock_acquire+0x1078/0x1f44 lock_acquire+0x1fc/0x32c _raw_spin_lock_irqsave+0x60/0x88 __irq_get_desc_lock+0x58/0x98 enable_irq+0x38/0xa0 lmh_enable_interrupt+0x2c/0x38 irq_enable+0x40/0x8c __irq_startup+0x78/0xa4 irq_startup+0x78/0x168 __enable_irq+0x70/0x7c enable_irq+0x4c/0xa0 qcom_cpufreq_ready+0x20/0x2c cpufreq_online+0x2a8/0x988 cpufreq_add_dev+0x80/0x98 subsys_interface_register+0x104/0x134 cpufreq_register_driver+0x150/0x234 qcom_cpufreq_hw_driver_probe+0x2a8/0x388 platform_probe+0x68/0xc0 really_probe+0xbc/0x298 __driver_probe_device+0x78/0x12c driver_probe_device+0x3c/0x160 __device_attach_driver+0xb8/0x138 bus_for_each_drv+0x84/0xe0 __device_attach+0x9c/0x188 device_initial_probe+0x14/0x20 bus_probe_device+0xac/0xb0 deferred_probe_work_func+0x8c/0xc8 process_one_work+0x20c/0x62c worker_thread+0x1bc/0x36c kthread+0x120/0x124 ret_from_fork+0x10/0x20 Fixes: 53bca371cdf7 ("thermal/drivers/qcom: Add support for LMh driver") Cc: stable@vger.kernel.org Signed-off-by: Dmitry Baryshkov --- drivers/thermal/qcom/lmh.c | 7 +++++++ 1 file changed, 7 insertions(+) --- base-commit: 797012914d2d031430268fe512af0ccd7d8e46ef change-id: 20240721-lmh-lockdep-88de09e77089 Best regards, diff --git a/drivers/thermal/qcom/lmh.c b/drivers/thermal/qcom/lmh.c index 5225b3621a56..d2d49264cf83 100644 --- a/drivers/thermal/qcom/lmh.c +++ b/drivers/thermal/qcom/lmh.c @@ -73,7 +73,14 @@ static struct irq_chip lmh_irq_chip = { static int lmh_irq_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) { struct lmh_hw_data *lmh_data = d->host_data; + static struct lock_class_key lmh_lock_key; + static struct lock_class_key lmh_request_key; + /* + * This lock class tells lockdep that GPIO irqs are in a different + * category than their parents, so it won't report false recursion. + */ + irq_set_lockdep_class(irq, &lmh_lock_key, &lmh_request_key); irq_set_chip_and_handler(irq, &lmh_irq_chip, handle_simple_irq); irq_set_chip_data(irq, lmh_data);