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| author | Zheng Yan <zheng.z.yan@intel.com> | 2012-06-23 10:23:49 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-23 10:47:47 -0600 |
| commit | 71a83bd727cc31c5fe960c3758cb396267ff710e (patch) | |
| tree | c4655a683b386c98d7c85bddd019e67711310c71 /drivers/pci/pci.c | |
| parent | ee85f543710dd56ce526cb44e39191f32972e5ad (diff) | |
| download | linux-71a83bd727cc31c5fe960c3758cb396267ff710e.tar.gz linux-71a83bd727cc31c5fe960c3758cb396267ff710e.tar.bz2 linux-71a83bd727cc31c5fe960c3758cb396267ff710e.zip | |
PCI/PM: add runtime PM support to PCIe port
This patch adds runtime PM support to PCIe port. This is needed by
PCIe D3cold support, where PCIe device without ACPI node may be
powered on/off by PCIe port.
Because runtime suspend is broken for some chipsets, a black list is
used to disable runtime PM support for these chipsets.
Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 447e83472c01..9eae64b17954 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1518,6 +1518,16 @@ static void pci_pme_list_scan(struct work_struct *work) if (!list_empty(&pci_pme_list)) { list_for_each_entry_safe(pme_dev, n, &pci_pme_list, list) { if (pme_dev->dev->pme_poll) { + struct pci_dev *bridge; + + bridge = pme_dev->dev->bus->self; + /* + * If bridge is in low power state, the + * configuration space of subordinate devices + * may be not accessible + */ + if (bridge && bridge->current_state != PCI_D0) + continue; pci_pme_wakeup(pme_dev->dev, NULL); } else { list_del(&pme_dev->list); |