1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index cf57d7de3765..9f79dd6d51ab 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -19,6 +19,7 @@
 #include <asm/dma.h>    /* isa_dma_bridge_buggy */
 #include "pci.h"
 
+unsigned int pci_pm_d3_delay = 10;
 
 /**
  * pci_bus_max_busnr - returns maximum PCI bus number of given bus' children
@@ -313,6 +314,14 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
         } else if (dev->current_state == state)
                 return 0;        /* we're already there */
 
+        /*
+         * If the device or the parent bridge can't support PCI PM, ignore
+         * the request if we're doing anything besides putting it into D0
+         * (which would only happen on boot).
+         */
+        if ((state == PCI_D1 || state == PCI_D2) && pci_no_d1d2(dev))
+                return 0;
+
         /* find PCI PM capability in list */
         pm = pci_find_capability(dev, PCI_CAP_ID_PM);
         
@@ -363,7 +372,7 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
         /* Mandatory power management transition delays */
         /* see PCI PM 1.1 5.6.1 table 18 */
         if (state == PCI_D3hot || dev->current_state == PCI_D3hot)
-                msleep(10);
+                msleep(pci_pm_d3_delay);
         else if (state == PCI_D2 || dev->current_state == PCI_D2)
                 udelay(200);