From nobody Thu Nov 28 20:31:18 2024 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.19]) (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 4DA2F152E1C; Mon, 30 Sep 2024 08:19:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.19 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727684388; cv=none; b=PNvVJueasPb7XsPRmvch4jqoZrsg+SThp9JQNmA6ODj7Lvo+bT+GFCWKrd1TGSjYdHtkKpAZcjWJVTvgfMva72oY3O61rcPyqFZbmrfXY7jlsibKv+oUyeWKy18lu/w4iqZz/9Jd4khoz/P901cBEeY3lmxPjifS0tX9IHv1c1A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727684388; c=relaxed/simple; bh=UiBl2UAfZ5jkKQJ30HaG7GtfKxgzF3LqEHQ9vzopWMA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=l06ugBKa7ww4aee/4myJEFAgHRBT8zLhZAzEnBb1RcN1vqBr3PFsJ5FOPLjuGiTTqpllx3I+QEM+NvldFRXxx00u5rUvlgJio8unP8itE3cQRQlCxJ31NDWkoQpRuynP6yzNF4tFit7CDdA1dZgl+zBTM6muk5IQs8Y3nsidArM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=MMfdhUHi; arc=none smtp.client-ip=198.175.65.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="MMfdhUHi" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1727684387; x=1759220387; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=UiBl2UAfZ5jkKQJ30HaG7GtfKxgzF3LqEHQ9vzopWMA=; b=MMfdhUHiFfB9ozCdROocbFJQdYcBaLt15UPlAd5yQEv9KMHA8X+FqTxR ozyJ5rz65itEPD2wMMvB4ejySIeKCnm7TM9iktdSJ3E/aw3OgWQFGdx2M aXCuIF0DfWHBAiqkP7gWlyVN1Q9zZ6ZoF8MsozNozDy2vh0Ep8MyEZ7MV i8b9I4GD9N7oPlXKITClhIhOic6WAJaKiJCUQEei2C6GoNtI/hB93UWKz FAGfyQkeMOts7ND2JFq2sQYYXWbjQZOcIKpXiSx4dcdFGHNoiWVogeV7h ErJ2ZrEMyFDyT9Nsyo5U/vI5j8Yh1k7ofmWvcLavouBPPV53dV3HvoU4o Q==; X-CSE-ConnectionGUID: pH3j0GcHSmaMxmMKVn0z6w== X-CSE-MsgGUID: qlFpR4PIRS6RbeketBntnw== X-IronPort-AV: E=McAfee;i="6700,10204,11210"; a="26638958" X-IronPort-AV: E=Sophos;i="6.11,165,1725346800"; d="scan'208";a="26638958" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Sep 2024 01:18:28 -0700 X-CSE-ConnectionGUID: 2i3p16WMQveSKdAuEexl2A== X-CSE-MsgGUID: xZO9lH2hQ++vts/VA9pNTw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,165,1725346800"; d="scan'208";a="96549423" Received: from unknown (HELO rzhang1-mobl7.ccr.corp.intel.com) ([10.245.243.126]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Sep 2024 01:18:24 -0700 From: Zhang Rui To: rafael.j.wysocki@intel.com Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, srinivas.pandruvada@intel.com Subject: [PATCH 2/6] thermal: proc_thermal: Fix WARNING during module unload Date: Mon, 30 Sep 2024 16:17:57 +0800 Message-Id: <20240930081801.28502-3-rui.zhang@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240930081801.28502-1-rui.zhang@intel.com> References: <20240930081801.28502-1-rui.zhang@intel.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 Content-Type: text/plain; charset="utf-8" proc_thermal driver uses pcim_device_enable() to enable the pci device, which means the device will be automatically disabled on driver detach. Thus there is no need to call pci_disable_device() again. With recent PCI device resource management improvements, e.g. commit f748a07a0b64 ("PCI: Remove legacy pcim_release()"), this problem is exposed and triggers below WARNING, [ 224.010735] proc_thermal_pci 0000:00:04.0: disabling already-disabled d= evice [ 224.010747] WARNING: CPU: 8 PID: 4442 at drivers/pci/pci.c:2250 pci_dis= able_device+0xe5/0x100 ... [ 224.010844] Call Trace: [ 224.010845] [ 224.010847] ? show_regs+0x6d/0x80 [ 224.010851] ? __warn+0x8c/0x140 [ 224.010854] ? pci_disable_device+0xe5/0x100 [ 224.010856] ? report_bug+0x1c9/0x1e0 [ 224.010859] ? handle_bug+0x46/0x80 [ 224.010862] ? exc_invalid_op+0x1d/0x80 [ 224.010863] ? asm_exc_invalid_op+0x1f/0x30 [ 224.010867] ? pci_disable_device+0xe5/0x100 [ 224.010869] ? pci_disable_device+0xe5/0x100 [ 224.010871] ? kfree+0x21a/0x2b0 [ 224.010873] pcim_disable_device+0x20/0x30 [ 224.010875] devm_action_release+0x16/0x20 [ 224.010878] release_nodes+0x47/0xc0 [ 224.010880] devres_release_all+0x9f/0xe0 [ 224.010883] device_unbind_cleanup+0x12/0x80 [ 224.010885] device_release_driver_internal+0x1ca/0x210 [ 224.010887] driver_detach+0x4e/0xa0 [ 224.010889] bus_remove_driver+0x6f/0xf0 [ 224.010890] driver_unregister+0x35/0x60 [ 224.010892] pci_unregister_driver+0x44/0x90 [ 224.010894] proc_thermal_pci_driver_exit+0x14/0x5f0 [processor_thermal= _device_pci] ... [ 224.010921] ---[ end trace 0000000000000000 ]--- Remove the pci_disable_device() calls. Fixes: acd65d5d1cf4 ("thermal/drivers/int340x/processor_thermal: Add PCI MM= IO based thermal driver") Signed-off-by: Zhang Rui Reviewed-by: Srinivas Pandruvada --- .../intel/int340x_thermal/processor_thermal_device_pci.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device= _pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci= .c index 006614921870..ba5d36d36fc4 100644 --- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c +++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c @@ -416,7 +416,6 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev,= const struct pci_device_ if (!pci_info->no_legacy) proc_thermal_remove(proc_priv); proc_thermal_mmio_remove(pdev, proc_priv); - pci_disable_device(pdev); =20 return ret; } @@ -438,7 +437,6 @@ static void proc_thermal_pci_remove(struct pci_dev *pde= v) proc_thermal_mmio_remove(pdev, pci_info->proc_priv); if (!pci_info->no_legacy) proc_thermal_remove(proc_priv); - pci_disable_device(pdev); } =20 #ifdef CONFIG_PM_SLEEP --=20 2.34.1