[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, 19 insertions, 0 deletions

diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 8eb599708de8..a0d43ea872df 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -253,6 +253,24 @@ static int acpi_pci_choose_state(struct pci_dev *pdev, pm_message_t state)
         return -ENODEV;
 }
 
+static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
+{
+        acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
+        static int state_conv[] = {
+                [0] = 0,
+                [1] = 1,
+                [2] = 2,
+                [3] = 3,
+                [4] = 3
+        };
+        int acpi_state = state_conv[(int __force) state];
+
+        if (!handle)
+                return -ENODEV;
+        return acpi_bus_set_power(handle, acpi_state);
+}
+
+
 /* ACPI bus type */
 static int pci_acpi_find_device(struct device *dev, acpi_handle *handle)
 {
@@ -300,6 +318,7 @@ static int __init pci_acpi_init(void)
         if (ret)
                 return 0;
         platform_pci_choose_state = acpi_pci_choose_state;
+        platform_pci_set_power_state = acpi_pci_set_power_state;
         return 0;
 }
 arch_initcall(pci_acpi_init);