linux-kernel - [PATCH 4/7] PCI/PM: Run resume fixups before disabling wakeup events

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Date:   Mon, 14 Oct 2019 18:00:13 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Dexuan Cui <decui@...rosoft.com>
Cc:     "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>, olaf@...fle.de,
        apw@...onical.com, jasowang@...hat.com, vkuznets@...hat.com,
        marcelo.cerri@...onical.com, jackm@...lanox.com,
        linux-pci@...r.kernel.org, linux-hyperv@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        driverdev-devel@...uxdriverproject.org,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH 4/7] PCI/PM: Run resume fixups before disabling wakeup events

From: Bjorn Helgaas <bhelgaas@...gle.com>

pci_pm_resume() and pci_pm_restore() call pci_pm_default_resume(), which
runs resume fixups before disabling wakeup events:

  static void pci_pm_default_resume(struct pci_dev *pci_dev)
  {
    pci_fixup_device(pci_fixup_resume, pci_dev);
    pci_enable_wake(pci_dev, PCI_D0, false);
  }

pci_pm_runtime_resume() does both of these, but in the opposite order:

  pci_enable_wake(pci_dev, PCI_D0, false);
  pci_fixup_device(pci_fixup_resume, pci_dev);

We should always use the same ordering unless there's a reason to do
otherwise.  Change pci_pm_runtime_resume() to call pci_pm_default_resume()
instead of open-coding this, so the fixups are always done before disabling
wakeup events.

Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 drivers/pci/pci-driver.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 0c3086793e4e..55acb658273f 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -1345,8 +1345,7 @@ static int pci_pm_runtime_resume(struct device *dev)
 		return 0;
 
 	pci_fixup_device(pci_fixup_resume_early, pci_dev);
-	pci_enable_wake(pci_dev, PCI_D0, false);
-	pci_fixup_device(pci_fixup_resume, pci_dev);
+	pci_pm_default_resume(pci_dev);
 
 	if (pm && pm->runtime_resume)
 		rc = pm->runtime_resume(dev);
-- 
2.23.0.700.g56cf767bdb-goog