Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6

* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (75 commits)
  PCI hotplug: clean up acpi_run_hpp()
  PCI hotplug: acpiphp: use generic pci_configure_slot()
  PCI hotplug: shpchp: use generic pci_configure_slot()
  PCI hotplug: pciehp: use generic pci_configure_slot()
  PCI hotplug: add pci_configure_slot()
  PCI hotplug: clean up acpi_get_hp_params_from_firmware() interface
  PCI hotplug: acpiphp: don't cache hotplug_params in acpiphp_bridge
  PCI hotplug: acpiphp: remove superfluous _HPP/_HPX evaluation
  PCI: Clear saved_state after the state has been restored
  PCI PM: Return error codes from pci_pm_resume()
  PCI: use dev_printk in quirk messages
  PCI / PCIe portdrv: Fix pcie_portdrv_slot_reset()
  PCI Hotplug: convert acpi_pci_detect_ejectable() to take an acpi_handle
  PCI Hotplug: acpiphp: find bridges the easy way
  PCI: pcie portdrv: remove unused variable
  PCI / ACPI PM: Propagate wake-up enable for devices w/o ACPI support
  ACPI PM: Replace wakeup.prepared with reference counter
  PCI PM: Introduce device flag wakeup_prepared
  PCI / ACPI PM: Rework some debug messages
  PCI PM: Simplify PCI wake-up code
  ...

Fixed up conflict in arch/powerpc/kernel/pci_64.c due to OF device tree
scanning having been moved and merged for the 32- and 64-bit cases.  The
'needs_freset' initialization added in 6e19314cc ("PCI/powerpc: support
PCIe fundamental reset") is now in arch/powerpc/kernel/pci_of_scan.c.

5 files changed, 49 insertions, 43 deletions

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 55b5b90c2a44..31b961c2f22f 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -61,20 +61,6 @@ static struct acpi_driver acpi_pci_root_driver = {
                 },
 };
 
-struct acpi_pci_root {
-        struct list_head node;
-        struct acpi_device *device;
-        struct pci_bus *bus;
-        u16 segment;
-        u8 bus_nr;
-
-        u32 osc_support_set;    /* _OSC state of support bits */
-        u32 osc_control_set;    /* _OSC state of control bits */
-        u32 osc_control_qry;    /* the latest _OSC query result */
-
-        u32 osc_queried:1;      /* has _OSC control been queried? */
-};
-
 static LIST_HEAD(acpi_pci_roots);
 
 static struct acpi_pci_driver *sub_driver;
@@ -317,7 +303,7 @@ static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
         return status;
 }
 
-static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
+struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
 {
         struct acpi_pci_root *root;
 
@@ -327,6 +313,7 @@ static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
         }
         return NULL;
 }
+EXPORT_SYMBOL_GPL(acpi_pci_find_root);
 
 struct acpi_handle_node {
         struct list_head node;
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index d74365d4a6e7..5a09bf392ec1 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -44,6 +44,8 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
+#include "sleep.h"
+
 #define _COMPONENT                      ACPI_POWER_COMPONENT
 ACPI_MODULE_NAME("power");
 #define ACPI_POWER_CLASS                "power_resource"
@@ -361,17 +363,15 @@ int acpi_device_sleep_wake(struct acpi_device *dev,
  */
 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
 {
-        int i, err;
+        int i, err = 0;
 
         if (!dev || !dev->wakeup.flags.valid)
                 return -EINVAL;
 
-        /*
-         * Do not execute the code below twice in a row without calling
-         * acpi_disable_wakeup_device_power() in between for the same device
-         */
-        if (dev->wakeup.flags.prepared)
-                return 0;
+        mutex_lock(&acpi_device_lock);
+
+        if (dev->wakeup.prepare_count++)
+                goto out;
 
         /* Open power resource */
         for (i = 0; i < dev->wakeup.resources.count; i++) {
@@ -379,7 +379,8 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
                 if (ret) {
                         printk(KERN_ERR PREFIX "Transition power state\n");
                         dev->wakeup.flags.valid = 0;
-                        return -ENODEV;
+                        err = -ENODEV;
+                        goto err_out;
                 }
         }
 
@@ -388,9 +389,13 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
          * in arbitrary power state afterwards.
          */
         err = acpi_device_sleep_wake(dev, 1, sleep_state, 3);
-        if (!err)
-                dev->wakeup.flags.prepared = 1;
 
+ err_out:
+        if (err)
+                dev->wakeup.prepare_count = 0;
+
+ out:
+        mutex_unlock(&acpi_device_lock);
         return err;
 }
 
@@ -402,35 +407,42 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
  */
 int acpi_disable_wakeup_device_power(struct acpi_device *dev)
 {
-        int i, ret;
+        int i, err = 0;
 
         if (!dev || !dev->wakeup.flags.valid)
                 return -EINVAL;
 
+        mutex_lock(&acpi_device_lock);
+
+        if (--dev->wakeup.prepare_count > 0)
+                goto out;
+
         /*
-         * Do not execute the code below twice in a row without calling
-         * acpi_enable_wakeup_device_power() in between for the same device
+         * Executing the code below even if prepare_count is already zero when
+         * the function is called may be useful, for example for initialisation.
          */
-        if (!dev->wakeup.flags.prepared)
-                return 0;
+        if (dev->wakeup.prepare_count < 0)
+                dev->wakeup.prepare_count = 0;
 
-        dev->wakeup.flags.prepared = 0;
-
-        ret = acpi_device_sleep_wake(dev, 0, 0, 0);
-        if (ret)
-                return ret;
+        err = acpi_device_sleep_wake(dev, 0, 0, 0);
+        if (err)
+                goto out;
 
         /* Close power resource */
         for (i = 0; i < dev->wakeup.resources.count; i++) {
-                ret = acpi_power_off_device(dev->wakeup.resources.handles[i], dev);
+                int ret = acpi_power_off_device(
+                                dev->wakeup.resources.handles[i], dev);
                 if (ret) {
                         printk(KERN_ERR PREFIX "Transition power state\n");
                         dev->wakeup.flags.valid = 0;
-                        return -ENODEV;
+                        err = -ENODEV;
+                        goto out;
                 }
         }
 
-        return ret;
+ out:
+        mutex_unlock(&acpi_device_lock);
+        return err;
 }
 
 /* --------------------------------------------------------------------------
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 781435d7e369..318b1ea7a5bf 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -781,6 +781,7 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
         kfree(buffer.pointer);
 
         device->wakeup.flags.valid = 1;
+        device->wakeup.prepare_count = 0;
         /* Call _PSW/_DSW object to disable its ability to wake the sleeping
          * system for the ACPI device with the _PRW object.
          * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 42159a28f433..feece693d773 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -689,19 +689,25 @@ int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 {
         acpi_handle handle;
         struct acpi_device *adev;
+        int error;
 
-        if (!device_may_wakeup(dev))
+        if (!device_can_wakeup(dev))
                 return -EINVAL;
 
         handle = DEVICE_ACPI_HANDLE(dev);
         if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
-                printk(KERN_DEBUG "ACPI handle has no context!\n");
+                dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__);
                 return -ENODEV;
         }
 
-        return enable ?
+        error = enable ?
                 acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
                 acpi_disable_wakeup_device_power(adev);
+        if (!error)
+                dev_info(dev, "wake-up capability %s by ACPI\n",
+                                enable ? "enabled" : "disabled");
+
+        return error;
 }
 #endif
 
diff --git a/drivers/acpi/wakeup.c b/drivers/acpi/wakeup.c
index 88725dcdf8bc..e0ee0c036f5a 100644
--- a/drivers/acpi/wakeup.c
+++ b/drivers/acpi/wakeup.c
@@ -68,7 +68,7 @@ void acpi_enable_wakeup_device(u8 sleep_state)
                 /* If users want to disable run-wake GPE,
                  * we only disable it for wake and leave it for runtime
                  */
-                if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+                if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
                     || sleep_state > (u32) dev->wakeup.sleep_state) {
                         if (dev->wakeup.flags.run_wake) {
                                 /* set_gpe_type will disable GPE, leave it like that */
@@ -100,7 +100,7 @@ void acpi_disable_wakeup_device(u8 sleep_state)
                 if (!dev->wakeup.flags.valid)
                         continue;
 
-                if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+                if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
                     || sleep_state > (u32) dev->wakeup.sleep_state) {
                         if (dev->wakeup.flags.run_wake) {
                                 acpi_set_gpe_type(dev->wakeup.gpe_device,