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path: root/drivers/pci/pci.c
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Diffstat (limited to 'drivers/pci/pci.c')
-rw-r--r--drivers/pci/pci.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 740fb4ea966..130ed1daf0f 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1275,6 +1275,22 @@ bool pci_check_pme_status(struct pci_dev *dev)
return ret;
}
+/*
+ * Time to wait before the system can be put into a sleep state after reporting
+ * a wakeup event signaled by a PCI device.
+ */
+#define PCI_WAKEUP_COOLDOWN 100
+
+/**
+ * pci_wakeup_event - Report a wakeup event related to a given PCI device.
+ * @dev: Device to report the wakeup event for.
+ */
+void pci_wakeup_event(struct pci_dev *dev)
+{
+ if (device_may_wakeup(&dev->dev))
+ pm_wakeup_event(&dev->dev, PCI_WAKEUP_COOLDOWN);
+}
+
/**
* pci_pme_wakeup - Wake up a PCI device if its PME Status bit is set.
* @dev: Device to handle.
@@ -1285,8 +1301,10 @@ bool pci_check_pme_status(struct pci_dev *dev)
*/
static int pci_pme_wakeup(struct pci_dev *dev, void *ign)
{
- if (pci_check_pme_status(dev))
+ if (pci_check_pme_status(dev)) {
pm_request_resume(&dev->dev);
+ pci_wakeup_event(dev);
+ }
return 0;
}