From patchwork Sat Apr 8 04:55:51 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sinan Kaya X-Patchwork-Id: 748538 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3w0PLc136Qz9s8D for ; Sat, 8 Apr 2017 14:56:56 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=codeaurora.org header.i=@codeaurora.org header.b="GtRkHNVV"; dkim=pass (1024-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="a0Mi1/5C"; dkim-atps=neutral Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752143AbdDHE4l (ORCPT ); Sat, 8 Apr 2017 00:56:41 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:47736 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751968AbdDHE4X (ORCPT ); Sat, 8 Apr 2017 00:56:23 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id AC17460DB3; Sat, 8 Apr 2017 04:56:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1491627381; bh=9M75+RzDjSEpT0h6KrwDPf4l1t/ZQ7ugpbkcWJc7Wgk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GtRkHNVVAC+u3GGJ9KF0rYkN5z8+UnttqF6fl3/hsG8ePTjjae/5GHYm5S7bMyXln 7hD0YzD+RfjUlVArYB1lNyGUSIUrMMU6c8A0nnOt1EBO8jPVR+nLDF1TpiW5XyRi/C khiIy3J5SSjV18Zyd7EbP9Ita+wR/hBg4oE+MnW0= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_SIGNED, T_DKIM_INVALID autolearn=no autolearn_force=no version=3.4.0 Received: from drakthul.qualcomm.com (global_nat1_iad_fw.qualcomm.com [129.46.232.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: okaya@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 97D1A60DAB; Sat, 8 Apr 2017 04:56:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1491627380; bh=9M75+RzDjSEpT0h6KrwDPf4l1t/ZQ7ugpbkcWJc7Wgk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a0Mi1/5CCDtEjNlYWywFAZl7+LjizAMxZOKPJpXyz77iB2UEtLrsBV+8r0+CW1GFH gtAl+//3IajhgeUKqxsPm2RykGpkV062S1CVw6JhBq3cWEBmGRAEqVgqGPCbYZ3KpU 0HI3juW0kstzJ5mK6/y1A08uCnHqS5HnJ4a7XWug= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 97D1A60DAB Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=okaya@codeaurora.org From: Sinan Kaya To: linux-pci@vger.kernel.org, timur@codeaurora.org Cc: mayurkumar.patel@intel.com, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Sinan Kaya , Bjorn Helgaas , Rajat Jain , Yinghai Lu , David Daney , Shawn Lin , Julia Lawall , linux-kernel@vger.kernel.org Subject: [PATCH V8 5/5] PCI/ASPM: move link_state cleanup to bridge remove Date: Sat, 8 Apr 2017 00:55:51 -0400 Message-Id: <1491627351-1111-6-git-send-email-okaya@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1491627351-1111-1-git-send-email-okaya@codeaurora.org> References: <1491627351-1111-1-git-send-email-okaya@codeaurora.org> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org For endpoints, change pcie_aspm_exit_link_state() so it cleans up the device's own state and disables ASPM if necessary, but doesn't remove the parent's link_state. For bridges, change pcie_aspm_exit_link_state() so it frees the bridge's own link_state. Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=194895 Signed-off-by: Sinan Kaya --- drivers/pci/pcie/aspm.c | 20 +++++++++++++++----- drivers/pci/remove.c | 3 +-- 2 files changed, 16 insertions(+), 7 deletions(-) diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index c7da087..d99fa3f 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -972,6 +972,21 @@ void pcie_aspm_exit_link_state(struct pci_dev *pdev) struct pci_dev *parent = pdev->bus->self; struct pcie_link_state *link, *root, *parent_link; + if (pdev->has_secondary_link) { + link = pdev->link_state; + down_read(&pci_bus_sem); + mutex_lock(&aspm_lock); + + list_del(&link->sibling); + list_del(&link->link); + + /* Clock PM is for endpoint device */ + free_link_state(link); + mutex_unlock(&aspm_lock); + up_read(&pci_bus_sem); + return; + } + if (!parent || !parent->link_state) return; @@ -990,11 +1005,6 @@ void pcie_aspm_exit_link_state(struct pci_dev *pdev) /* All functions are removed, so just disable ASPM for the link */ pcie_config_aspm_link(link, 0); - list_del(&link->sibling); - list_del(&link->link); - /* Clock PM is for endpoint device */ - free_link_state(link); - /* Recheck latencies and configure upstream links */ if (parent_link) { pcie_update_aspm_capable(root); diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c index 73a03d3..7e14ebd 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -25,8 +25,7 @@ static void pci_stop_dev(struct pci_dev *dev) dev->is_added = 0; } - if (dev->bus->self) - pcie_aspm_exit_link_state(dev); + pcie_aspm_exit_link_state(dev); } static void pci_destroy_dev(struct pci_dev *dev)