1 files changed, 17 insertions, 4 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 2329f941a0dc..fde41cc14734 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -164,7 +164,6 @@ int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap)
         return __pci_bus_find_cap(bus, devfn, hdr_type & 0x7f, cap);
 }
 
-#if 0
 /**
  * pci_find_ext_capability - Find an extended capability
  * @dev: PCI device to query
@@ -212,7 +211,7 @@ int pci_find_ext_capability(struct pci_dev *dev, int cap)
 
         return 0;
 }
-#endif  /*  0  */
+EXPORT_SYMBOL_GPL(pci_find_ext_capability);
 
 /**
  * pci_find_parent_resource - return resource region of parent bus of given region
@@ -461,9 +460,23 @@ int
 pci_restore_state(struct pci_dev *dev)
 {
         int i;
+        int val;
 
-        for (i = 0; i < 16; i++)
-                pci_write_config_dword(dev,i * 4, dev->saved_config_space[i]);
+        /*
+         * The Base Address register should be programmed before the command
+         * register(s)
+         */
+        for (i = 15; i >= 0; i--) {
+                pci_read_config_dword(dev, i * 4, &val);
+                if (val != dev->saved_config_space[i]) {
+                        printk(KERN_DEBUG "PM: Writing back config space on "
+                                "device %s at offset %x (was %x, writing %x)\n",
+                                pci_name(dev), i,
+                                val, (int)dev->saved_config_space[i]);
+                        pci_write_config_dword(dev,i * 4,
+                                dev->saved_config_space[i]);
+                }
+        }
         pci_restore_msi_state(dev);
         pci_restore_msix_state(dev);
         return 0;