From nobody Sun Nov 24 23:21:13 2024 Received: from mail-lf1-f47.google.com (mail-lf1-f47.google.com [209.85.167.47]) (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 DDA242EAEA for ; Fri, 1 Nov 2024 01:04:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.47 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730423093; cv=none; b=K3cZT7akieCYc9n9yf07quolP6h51PzhpjmenvMF61C/jv+7Tk85x/lZoNR/bnAK5sxHu+EPqUtC+obnNpH3bEK0EA3rSQGDZDlhc8E0kjS0UPxh6+56VXJazl2ycAbBugiLxt9zVOgpGYHwJGThudzD73NbgVjHMZy05QmbKMM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730423093; c=relaxed/simple; bh=b000gK2eeyGVybAeUtdp3ol8MSJmrwkUM8+QObbFxsk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=DUF8dbvdZoyGm8AKo6eAJlKb/s71zfyvPUgm/0c0xB0lq2s1EsuPFbobzF/JfqK8HuOKYuaDJQeMR2UIeZN9JQP+EU+/2ss5ae+5m4BzVSGv+Xrq+gcm+xKNUHcbWHtcRttqCj6jaIyGqLTgIaZbYvrzNhHivdjnNzv5T5iW4Vc= 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=V4z4qmDO; arc=none smtp.client-ip=209.85.167.47 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="V4z4qmDO" Received: by mail-lf1-f47.google.com with SMTP id 2adb3069b0e04-53b34ed38easo1434838e87.0 for ; Thu, 31 Oct 2024 18:04:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1730423085; x=1731027885; 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=FqUKffGBxGjGIy1gxbpRHdCLpRulUNePaLzIj22S1/0=; b=V4z4qmDO0mw9Hk6qZunKeHmqcWcTUfx9yGlKSPJuVC6dUMBk3maDgn35fBF94qnviy US07KCHafewOMewIkCUwvRqJuW129AugJ9AaBWza+aIvlZVP302ic/iGv6YOOxtGh4Sa xvrhpiAqyR1/yVuKZCBJajU1xmPfK3igsuCeBU+6m4X+kiQRufLaVQ+yJLy7MMSF3v6u yG59nWvXWZmAj9nFIda59AS49ijO5DrlN03+zCp1rfufvbdz0mSAqLD4Ypmv4mhqOBKE JvtWBwXhtNPPbCCDTNsGfNTdP7kpYs6CX01mEfFA3+nE7GEGPwZStKm5NxdrpLf2yN+9 +g7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730423085; x=1731027885; 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=FqUKffGBxGjGIy1gxbpRHdCLpRulUNePaLzIj22S1/0=; b=KO0quqT49jK8FTzd9l02657aleuCforF2ZYlCPx279AQPtKvUl2t0M4dVv4nXkFxSU ZPlDod9zoRcysIRxJHGjDIxDdxeO6wzKisn0/8u4+ky0yZjr4JJW6Fz7f0jIAXQWlkpu sP7kWq2Ym2ov0vWMjR+93qi3jrvgWvOY7fBwPyvzl/y050AoHvW47yZ+4bBQLVW6bgNk 3sfchp/NMMnzJKqvJEsDtGeohMFie4peFA7LQ+xHiW6tJpqajrZz60qk/tWtxS3lORkJ GJIM9e2IHJBCEr+zTNuyB6//LBytik2U847ZhLQ9W0oYuF8jsePiG/wJSfD5PYkxk4CI Ex+w== X-Forwarded-Encrypted: i=1; AJvYcCW5EV2iy21g2qXUKxZaS0y157BB0YGJrCEyKhY7KSmYreciC94xF9y78jtBtTKN+7fUp4/2UXTCRovevcE=@vger.kernel.org X-Gm-Message-State: AOJu0Yw82L5IVGh7c8LZ69VYInYnSsxuxDRH5qubpaG6o9GuHdpISxqY YxccXWxTFBiEEdrBdqczBGF1892+eY5Gx/Pbe8ErhB5pyAZ4lvrqs/hUA+nJqzY= X-Google-Smtp-Source: AGHT+IFxKPkvoKcfI/+ZFD75cw7Ke/QIfWvEUTopSMRY+wGIMnAaGHV4oXlMPkMPyBM0NA8JoShqsA== X-Received: by 2002:a05:6512:b84:b0:536:55a9:caf0 with SMTP id 2adb3069b0e04-53b347231b4mr11193807e87.0.1730423084837; Thu, 31 Oct 2024 18:04:44 -0700 (PDT) Received: from umbar.lan ([192.130.178.90]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-53c7bde0ce9sm376165e87.268.2024.10.31.18.04.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 31 Oct 2024 18:04:43 -0700 (PDT) From: Dmitry Baryshkov Date: Fri, 01 Nov 2024 03:04:42 +0200 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: <20241101-lmh-lockdep-v1-1-96fd53cc241c@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 X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2638; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=b000gK2eeyGVybAeUtdp3ol8MSJmrwkUM8+QObbFxsk=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnJCkr21SOVaVEBe03u7HvWqvzrgdKJekHTS+c5 nL1aUunbmqJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZyQpKwAKCRCLPIo+Aiko 1dPnCACzq4nh7dVe9+PjvKpVpZhQn/7UQSBhgo5mEnx48N7AxGKGmxQ7iOFhwKa+53+XJTo9Dxc +6qhzL5rNr1td7T7F0+pkeeRY8Aq9Fpizt50vq/dm1RU591XPnwNeJHyZe11mDeRTP4doc+md/B D6qHrA9BbmGCTN0HwNklDldFgBIwp8kzDEbUUxVBM7zNxCa5p6nTozrRAJbSB6WP5FVyk7mz0bZ wm0KzA/t+4RJbWo291z/hz4DLjtcyP/9kzpZ6iuTm4awcAlPA5rDW8N/lxOaDd7wj8bGTBS/Ig8 gL4+Ir7vpyoZGtf9Wua+FSOBNyK8k8oD+PNF+YLYPb9c29/s 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 5225b3621a56c4a11f0ae56af1060d6d1460ef02..d2d49264cf83a4c464620204470= 0a7a8bf3c0b95 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