[ACPI] pci_set_power_state() now calls

	platform_pci_set_power_state()
		and ACPI can answer

http://bugzilla.kernel.org/show_bug.cgi?id=4277

Signed-off-by: David Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 5af941807785..a1c66e8ea5f2 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -235,7 +235,7 @@ pci_find_parent_resource(const struct pci_dev *dev, struct resource *res)
  * -EIO if device does not support PCI PM.
  * 0 if we can successfully change the power state.
  */
-
+int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t t) = NULL;
 int
 pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 {
@@ -299,8 +299,15 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
                 msleep(10);
         else if (state == PCI_D2 || dev->current_state == PCI_D2)
                 udelay(200);
-        dev->current_state = state;
 
+        /*
+         * Give firmware a chance to be called, such as ACPI _PRx, _PSx
+         * Firmware method after natice method ?
+         */
+        if (platform_pci_set_power_state)
+                platform_pci_set_power_state(dev, state);
+
+        dev->current_state = state;
         return 0;
 }