From nobody Wed Nov 27 09:57:18 2024 Received: from mail-lj1-f171.google.com (mail-lj1-f171.google.com [209.85.208.171]) (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 DAA7E1EABA2 for ; Fri, 11 Oct 2024 05:48:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728625732; cv=none; b=SztGGN/42XxsKzxe0Hni32oV5V26icmxRGZrooxTBD31/MGUoXzjwoZ0YaaYf4H3jIH++lkwzchAAhbHIjmCDGKXS6BegRa7doVAYz71QCk0FCLU5uZSUAi+rTmtbVXT/2GFahtLf9bYo7Itj1b5iDFnpqzv8iqyOkrzV8wSv2Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728625732; c=relaxed/simple; bh=gSDr2qXiWunqD83kcCcfkWzmofL1UeyjfIsv5gb6YVw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=arwDSK8Wd8hzF63ZVwCxGYjFP2vibw6Xy2p2mMkQ1YXrKV+1qmT3+ZLfhSX5HLYiB6k8U0BybIo74nS2ER4mpitXIFs5Vrs3z7Sx8ShOxlHd6WIg2N1H4UlchJ5mdX9hXN7DJWxGnyuGq03FSglI7TeOQBzCT8ksBrgx9U+furQ= 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=K5xphyqG; arc=none smtp.client-ip=209.85.208.171 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="K5xphyqG" Received: by mail-lj1-f171.google.com with SMTP id 38308e7fff4ca-2facf481587so12885781fa.1 for ; Thu, 10 Oct 2024 22:48:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1728625727; x=1729230527; 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=K5xphyqGvesNOdZhdTEFto1ShyNHS1P1jN2zpQl4Ps5Dg2JOv+Qhg0fZB/UJmrHbcQ ZqqQcOsBVBGrbRPRzY5fNdWjsa2A+j6rlWD5dQzvX1KWIjJ4hoJA3F9+jry+pZyyuApe rXxLTYRDaIoaBeEbVlPHd90yly5NvTRjOF8wYaR9uxHM+7Qm2YbBvttCu9qTIdbqFS72 WBOQYNjzwz9k9w/ZVe3fsqdsW0wPNqvQbI9wp9E8HZdi3QQlVmKihUCfSu0UBHmKxv91 /LfD/BPrwd2kXofVW+k+hohhEH1pQbKYiqHYj5Fov2r0zX1I3V/WdNvhtbhESLwcyJN6 jXIw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728625727; x=1729230527; 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=pgpdmaiC+Ni1EkGECyQAb9blvqRTE0ZA6HQbTO1iZuTT/S487csO99cWQeg2IKHEST H3e8SwsW1X+eNppWQlBkhYwOYKGZrfSHLGvXR7OjVbXIUUakKK1E/G30H2/F/0mSDoNn u1FPf8R0XSYdHX3ZOdLYUixHkHK4YW87IbhewvZk0KidYR3uQlUptg9H+igi9uBpdyux UVmEMXw2idL/hBZl/TRoxFn8gxeEUlMNEuhFM3Is+rAkQSTDGT61I6imwMvYa4vjMtHv Uknat5m4L5g82ho8Fh9dc5DrnHFFiWdOuKry4y/HsudYhSCFyMazhnHQKNNyuUfPmKfz 0lpQ== X-Forwarded-Encrypted: i=1; AJvYcCWnA/RBzZ8+OGA+4I8DFDTG//BOxGt3tYH9L/0GXQqC+YI0SXKH9oxfu8vghO6B3Pb4mZeLyOuaOPdlJNI=@vger.kernel.org X-Gm-Message-State: AOJu0Yx6yOukGhP+CUbI6ppWXySmXlbIHSzctwPMkH4P5vwJjYsZNIb8 2paICqw5AprR1yYIa2AyXNMpfateEA6mVMmLK8V52XjY6XJSZq0qG9JWrXnq+n8= X-Google-Smtp-Source: AGHT+IElgnZzJUF2VeU6qLAFyoymFdQaxiQWEzvuNGs2dbyEg43CbtOA9CKVQOGhLlMEcGoNVmZPew== X-Received: by 2002:a2e:be13:0:b0:2fa:c46a:eb4e with SMTP id 38308e7fff4ca-2fb326fe462mr3847561fa.3.1728625726600; Thu, 10 Oct 2024 22:48:46 -0700 (PDT) Received: from umbar.lan ([192.130.178.90]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-2fb24770a41sm4186111fa.129.2024.10.10.22.48.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Oct 2024 22:48:45 -0700 (PDT) From: Dmitry Baryshkov Date: Fri, 11 Oct 2024 08:48:39 +0300 Subject: [PATCH RESEND] thermal/drivers/qcom/lmh: remove false lockdep backtrace Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241011-lmh-lockdep-v1-1-495cbbe6fef1@linaro.org> 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, Dmitry Baryshkov 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/pANAwAKAYs8ij4CKSjVAcsmYgBnCLw70Pj12BWKspOc3Iexi6FaN+ED1D3pwfnZc rZjUEBmHieJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZwi8OwAKCRCLPIo+Aiko 1ZIXB/9KZut2clhqKYo18Rw7gj6QdBb3gWOHFkHnZwIf4UKQIRvHY36O3T/LEj/iqLn6LnMhO/G oMx2OjPb+s6le34h63v+PU0Zj6RUbR6lJyZhBpb3PIUhh/Xb7ncNroEgagZXa101Wx9RO4CsTls Z9bELVN7jxZ5zni4l08TXgV6Rscm9Vz21wyTpAjytzy8zgjl38QVXbPVAxcZO76N1OOw3ZF3uoz ny+8AZBw8zZDCmtq+Dxoi7ZA7JtXbPMHcjEqEnx491tIFMA7Sn2xliuZbpYj7WEtd9osPi0SBit VqJfFGBlEVV4lDOCl0RBgJzUo7zRdNfg86xrvOnpfE+MH1KD 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(+) 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 =3D { static int lmh_irq_map(struct irq_domain *d, unsigned int irq, irq_hw_numb= er_t hw) { struct lmh_hw_data *lmh_data =3D d->host_data; + static struct lock_class_key lmh_lock_key; + static struct lock_class_key lmh_request_key; =20 + /* + * 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); =20 --- base-commit: 797012914d2d031430268fe512af0ccd7d8e46ef change-id: 20240721-lmh-lockdep-88de09e77089 Best regards, --=20 Dmitry Baryshkov