diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-09-14 05:38:20 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-01 20:17:45 +0400 |
| commit | 65e8f55e673adae0177488ddb20444076f702a47 (patch) | |
| tree | 23278da8b82c93db107e37406a5bac959e02aa27 | |
| parent | cff43fc8785eb4f8b3fa5a1030890fd8cad0cbdd (diff) | |
| download | linux-65e8f55e673adae0177488ddb20444076f702a47.tar.xz | |
PCI / ACPI / PM: Clear pme_poll for devices in D3cold on wakeup
commit 834145156bedadfb50121f0bc5e9d9f9f942bcca upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/pci/pci-acpi.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 336b3f94a19a..0eab3a3c51c5 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); |