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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-09-14 03:38:20 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-09-20 00:24:43 +0200
commit834145156bedadfb50121f0bc5e9d9f9f942bcca (patch)
tree66659b38081b032ae8d82919284516ef4158fee1 /drivers/pci
parent272b98c6455f00884f0350f775c5342358ebb73f (diff)
downloadop-kernel-dev-834145156bedadfb50121f0bc5e9d9f9f942bcca.zip
op-kernel-dev-834145156bedadfb50121f0bc5e9d9f9f942bcca.tar.gz
PCI / ACPI / PM: Clear pme_poll for devices in D3cold on wakeup
Commit 448bd85 (PCI/PM: add PCIe runtime D3cold support) added a piece of code to pci_acpi_wake_dev() causing that function to behave in a special way for devices in D3cold (so that their configuration registers are not accessed before those devices are resumed). However, it didn't take the clearing of the pme_poll flag into account. That has to be done for all devices, even if they are in D3cold, or pci_pme_list_scan() will not know that wakeup has been signaled for the device and will poll its PME Status bit unnecessarily. Fix the problem by moving the clearing of the pme_poll flag in pci_acpi_wake_dev() before the code introduced by commit 448bd85. Reported-and-tested-by: David E. Box <david.e.box@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Cc: 3.6+ <stable@vger.kernel.org> # 3.6+
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/pci-acpi.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 7c29ee4..b0299e6 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -47,6 +47,9 @@ static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context)
if (event != ACPI_NOTIFY_DEVICE_WAKE || !pci_dev)
return;
+ if (pci_dev->pme_poll)
+ pci_dev->pme_poll = false;
+
if (pci_dev->current_state == PCI_D3cold) {
pci_wakeup_event(pci_dev);
pm_runtime_resume(&pci_dev->dev);
@@ -57,9 +60,6 @@ static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context)
if (pci_dev->pme_support)
pci_check_pme_status(pci_dev);
- if (pci_dev->pme_poll)
- pci_dev->pme_poll = false;
-
pci_wakeup_event(pci_dev);
pm_runtime_resume(&pci_dev->dev);
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