From patchwork Tue Oct 29 17:00:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 1186199 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 472dBl05swz9sPj for ; Wed, 30 Oct 2019 04:00:47 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726225AbfJ2RAi (ORCPT ); Tue, 29 Oct 2019 13:00:38 -0400 Received: from mga09.intel.com ([134.134.136.24]:18562 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390436AbfJ2RAi (ORCPT ); Tue, 29 Oct 2019 13:00:38 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Oct 2019 10:00:37 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,244,1569308400"; d="scan'208";a="203620873" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga006.jf.intel.com with ESMTP; 29 Oct 2019 10:00:23 -0700 Received: by black.fi.intel.com (Postfix, from userid 1001) id 023B7109; Tue, 29 Oct 2019 19:00:22 +0200 (EET) From: Mika Westerberg To: Bjorn Helgaas , "Rafael J. Wysocki" Cc: Lukas Wunner , Keith Busch , Andy Shevchenko , Frederick Lawler , "Gustavo A . R . Silva" , Sinan Kaya , Kai-Heng Feng , Mika Westerberg , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/2] PCI: pciehp: Do not disable interrupt twice on suspend Date: Tue, 29 Oct 2019 20:00:21 +0300 Message-Id: <20191029170022.57528-1-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org We try to keep PCIe hotplug ports runtime suspended when entering system suspend. Due to the fact that the PCIe portdrv sets NEVER_SKIP driver PM flag the PM core always calls system suspend/resume hooks even if the device is left runtime suspended. Since PCIe hotplug driver re-uses the same function for both it ends up disabling hotplug interrupt twice and the second time following is printed: pciehp 0000:03:01.0:pcie204: pcie_do_write_cmd: no response from device Prevent this from happening by checking whether the device is already runtime suspended when system suspend hook is called. Fixes: 9c62f0bfb832 ("PCI: pciehp: Implement runtime PM callbacks") Reported-by: Kai-Heng Feng Tested-by: Kai-Heng Feng Signed-off-by: Mika Westerberg Reviewed-by: Rafael J. Wysocki --- No changes from previous version. drivers/pci/hotplug/pciehp_core.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index b3122c151b80..56daad828c9e 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -253,7 +253,7 @@ static bool pme_is_native(struct pcie_device *dev) return pcie_ports_native || host->native_pme; } -static int pciehp_suspend(struct pcie_device *dev) +static void pciehp_disable_interrupt(struct pcie_device *dev) { /* * Disable hotplug interrupt so that it does not trigger @@ -261,7 +261,19 @@ static int pciehp_suspend(struct pcie_device *dev) */ if (pme_is_native(dev)) pcie_disable_interrupt(get_service_data(dev)); +} +#ifdef CONFIG_PM_SLEEP +static int pciehp_suspend(struct pcie_device *dev) +{ + /* + * If the port is already runtime suspended we can keep it that + * way. + */ + if (dev_pm_smart_suspend_and_suspended(&dev->port->dev)) + return 0; + + pciehp_disable_interrupt(dev); return 0; } @@ -279,6 +291,7 @@ static int pciehp_resume_noirq(struct pcie_device *dev) return 0; } +#endif static int pciehp_resume(struct pcie_device *dev) { @@ -292,6 +305,12 @@ static int pciehp_resume(struct pcie_device *dev) return 0; } +static int pciehp_runtime_suspend(struct pcie_device *dev) +{ + pciehp_disable_interrupt(dev); + return 0; +} + static int pciehp_runtime_resume(struct pcie_device *dev) { struct controller *ctrl = get_service_data(dev); @@ -318,10 +337,12 @@ static struct pcie_port_service_driver hpdriver_portdrv = { .remove = pciehp_remove, #ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP .suspend = pciehp_suspend, .resume_noirq = pciehp_resume_noirq, .resume = pciehp_resume, - .runtime_suspend = pciehp_suspend, +#endif + .runtime_suspend = pciehp_runtime_suspend, .runtime_resume = pciehp_runtime_resume, #endif /* PM */ };