5 files changed, 100 insertions, 142 deletions

diff --git a/drivers/pci/hotplug/acpi_pcihp.c b/drivers/pci/hotplug/acpi_pcihp.c
index e17ef54f0efc..c62ab8d240aa 100644
--- a/drivers/pci/hotplug/acpi_pcihp.c
+++ b/drivers/pci/hotplug/acpi_pcihp.c
@@ -501,5 +501,74 @@ int acpi_root_bridge(acpi_handle handle)
 }
 EXPORT_SYMBOL_GPL(acpi_root_bridge);
 
+
+static int is_ejectable(acpi_handle handle)
+{
+        acpi_status status;
+        acpi_handle tmp;
+        unsigned long long removable;
+        status = acpi_get_handle(handle, "_ADR", &tmp);
+        if (ACPI_FAILURE(status))
+                return 0;
+        status = acpi_get_handle(handle, "_EJ0", &tmp);
+        if (ACPI_SUCCESS(status))
+                return 1;
+        status = acpi_evaluate_integer(handle, "_RMV", NULL, &removable);
+        if (ACPI_SUCCESS(status) && removable)
+                return 1;
+        return 0;
+}
+
+/**
+ * acpi_pcihp_check_ejectable - check if handle is ejectable ACPI PCI slot
+ * @pbus: the PCI bus of the PCI slot corresponding to 'handle'
+ * @handle: ACPI handle to check
+ *
+ * Return 1 if handle is ejectable PCI slot, 0 otherwise.
+ */
+int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle)
+{
+        acpi_handle bridge_handle, parent_handle;
+
+        if (!(bridge_handle = acpi_pci_get_bridge_handle(pbus)))
+                return 0;
+        if ((ACPI_FAILURE(acpi_get_parent(handle, &parent_handle))))
+                return 0;
+        if (bridge_handle != parent_handle)
+                return 0;
+        return is_ejectable(handle);
+}
+EXPORT_SYMBOL_GPL(acpi_pci_check_ejectable);
+
+static acpi_status
+check_hotplug(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+        int *found = (int *)context;
+        if (is_ejectable(handle)) {
+                *found = 1;
+                return AE_CTRL_TERMINATE;
+        }
+        return AE_OK;
+}
+
+/**
+ * acpi_pci_detect_ejectable - check if the PCI bus has ejectable slots
+ * @pbus - PCI bus to scan
+ *
+ * Returns 1 if the PCI bus has ACPI based ejectable slots, 0 otherwise.
+ */
+int acpi_pci_detect_ejectable(struct pci_bus *pbus)
+{
+        acpi_handle handle;
+        int found = 0;
+
+        if (!(handle = acpi_pci_get_bridge_handle(pbus)))
+                return 0;
+        acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
+                            check_hotplug, (void *)&found, NULL);
+        return found;
+}
+EXPORT_SYMBOL_GPL(acpi_pci_detect_ejectable);
+
 module_param(debug_acpi, bool, 0644);
 MODULE_PARM_DESC(debug_acpi, "Debugging mode for ACPI enabled or not");
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 7a5760426897..f09b1010d477 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -46,6 +46,7 @@
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/pci_hotplug.h>
+#include <linux/pci-acpi.h>
 #include <linux/mutex.h>
 
 #include "../pci.h"
@@ -62,68 +63,6 @@ static void acpiphp_sanitize_bus(struct pci_bus *bus);
 static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus);
 static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context);
 
-
-/*
- * initialization & terminatation routines
- */
-
-/**
- * is_ejectable - determine if a slot is ejectable
- * @handle: handle to acpi namespace
- *
- * Ejectable slot should satisfy at least these conditions:
- *
- *  1. has _ADR method
- *  2. has _EJ0 method or _RMV method
- *
- * optionally
- *
- *  1. has _STA method
- *  2. has _PS0 method
- *  3. has _PS3 method
- *  4. ..
- */
-static int is_ejectable(acpi_handle handle)
-{
-        acpi_status status;
-        acpi_handle tmp;
-        unsigned long long removable;
-
-        status = acpi_get_handle(handle, "_ADR", &tmp);
-        if (ACPI_FAILURE(status))
-                return 0;
-
-        status = acpi_get_handle(handle, "_EJ0", &tmp);
-        if (ACPI_SUCCESS(status))
-                return 1;
-
-        status = acpi_get_handle(handle, "_RMV", &tmp);
-        if (ACPI_SUCCESS(status)) {
-                status = acpi_evaluate_integer(handle, "_RMV", NULL,
-                                               &removable);
-                if (ACPI_SUCCESS(status) && removable)
-                        return 1;
-        }
-
-        return 0;
-}
-
-
-/* callback routine to check for the existence of ejectable slots */
-static acpi_status
-is_ejectable_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
-{
-        int *count = (int *)context;
-
-        if (is_ejectable(handle)) {
-                (*count)++;
-                /* only one ejectable slot is enough */
-                return AE_CTRL_TERMINATE;
-        } else {
-                return AE_OK;
-        }
-}
-
 /* callback routine to check for the existence of a pci dock device */
 static acpi_status
 is_pci_dock_device(acpi_handle handle, u32 lvl, void *context, void **rv)
@@ -138,9 +77,6 @@ is_pci_dock_device(acpi_handle handle, u32 lvl, void *context, void **rv)
         }
 }
 
-
-
-
 /*
  * the _DCK method can do funny things... and sometimes not
  * hah-hah funny.
@@ -191,8 +127,9 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
         acpi_status status = AE_OK;
         unsigned long long adr, sun;
         int device, function, retval;
+        struct pci_bus *pbus = bridge->pci_bus;
 
-        if (!is_ejectable(handle) && !is_dock_device(handle))
+        if (!acpi_pci_check_ejectable(pbus, handle) && !is_dock_device(handle))
                 return AE_OK;
 
         acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
@@ -258,8 +195,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
                 bridge->nr_slots++;
 
                 dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n",
-                                slot->sun, pci_domain_nr(bridge->pci_bus),
-                                bridge->pci_bus->number, slot->device);
+                    slot->sun, pci_domain_nr(pbus), pbus->number, device);
                 retval = acpiphp_register_hotplug_slot(slot);
                 if (retval) {
                         if (retval == -EBUSY)
@@ -276,8 +212,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
         list_add_tail(&newfunc->sibling, &slot->funcs);
 
         /* associate corresponding pci_dev */
-        newfunc->pci_dev = pci_get_slot(bridge->pci_bus,
-                                         PCI_DEVFN(device, function));
+        newfunc->pci_dev = pci_get_slot(pbus, PCI_DEVFN(device, function));
         if (newfunc->pci_dev) {
                 slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON);
         }
@@ -326,27 +261,15 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
 
 
 /* see if it's worth looking at this bridge */
-static int detect_ejectable_slots(acpi_handle *bridge_handle)
+static int detect_ejectable_slots(struct pci_bus *pbus)
 {
-        acpi_status status;
-        int count;
-
-        count = 0;
-
-        /* only check slots defined directly below bridge object */
-        status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1,
-                                     is_ejectable_slot, (void *)&count, NULL);
-
-        /*
-         * we also need to add this bridge if there is a dock bridge or
-         * other pci device on a dock station (removable)
-         */
-        if (!count)
-                status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle,
-                                (u32)1, is_pci_dock_device, (void *)&count,
-                                NULL);
-
-        return count;
+        int found = acpi_pci_detect_ejectable(pbus);
+        if (!found) {
+                acpi_handle bridge_handle = acpi_pci_get_bridge_handle(pbus);
+                acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1,
+                                    is_pci_dock_device, (void *)&found, NULL);
+        }
+        return found;
 }
 
 
@@ -556,7 +479,7 @@ find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
                 goto out;
 
         /* check if this bridge has ejectable slots */
-        if ((detect_ejectable_slots(handle) > 0)) {
+        if ((detect_ejectable_slots(dev->subordinate) > 0)) {
                 dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev));
                 add_p2p_bridge(handle, dev);
         }
@@ -617,7 +540,7 @@ static int add_bridge(acpi_handle handle)
         }
 
         /* check if this bridge has ejectable slots */
-        if (detect_ejectable_slots(handle) > 0) {
+        if (detect_ejectable_slots(pci_bus) > 0) {
                 dbg("found PCI host-bus bridge with hot-pluggable slots\n");
                 add_host_bridge(handle, pci_bus);
         }
diff --git a/drivers/pci/hotplug/pciehp_acpi.c b/drivers/pci/hotplug/pciehp_acpi.c
index 88a5c57f2e5b..438d795f9fe3 100644
--- a/drivers/pci/hotplug/pciehp_acpi.c
+++ b/drivers/pci/hotplug/pciehp_acpi.c
@@ -24,6 +24,8 @@
  */
 
 #include <linux/acpi.h>
+#include <linux/pci.h>
+#include <linux/pci_hotplug.h>
 #include "pciehp.h"
 
 #define PCIEHP_DETECT_PCIE      (0)
@@ -41,59 +43,11 @@ MODULE_PARM_DESC(pciehp_detect_mode,
          "  auto(default) - Auto select mode. Use acpi option if duplicate\n"
          "                  slot ids are found. Otherwise, use pcie option\n");
 
-static int is_ejectable(acpi_handle handle)
-{
-        acpi_status status;
-        acpi_handle tmp;
-        unsigned long long removable;
-        status = acpi_get_handle(handle, "_ADR", &tmp);
-        if (ACPI_FAILURE(status))
-                return 0;
-        status = acpi_get_handle(handle, "_EJ0", &tmp);
-        if (ACPI_SUCCESS(status))
-                return 1;
-        status = acpi_evaluate_integer(handle, "_RMV", NULL, &removable);
-        if (ACPI_SUCCESS(status) && removable)
-                return 1;
-        return 0;
-}
-
-static acpi_status
-check_hotplug(acpi_handle handle, u32 lvl, void *context, void **rv)
-{
-        int *found = (int *)context;
-        if (is_ejectable(handle)) {
-                *found = 1;
-                return AE_CTRL_TERMINATE;
-        }
-        return AE_OK;
-}
-
-static int pciehp_detect_acpi_slot(struct pci_bus *pbus)
-{
-        acpi_handle handle;
-        struct pci_dev *pdev = pbus->self;
-        int found = 0;
-
-        if (!pdev){
-                int seg = pci_domain_nr(pbus), busnr = pbus->number;
-                handle = acpi_get_pci_rootbridge_handle(seg, busnr);
-        } else
-                handle = DEVICE_ACPI_HANDLE(&(pdev->dev));
-
-        if (!handle)
-                return 0;
-
-        acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
-                            check_hotplug, (void *)&found, NULL);
-        return found;
-}
-
 int pciehp_acpi_slot_detection_check(struct pci_dev *dev)
 {
         if (slot_detection_mode != PCIEHP_DETECT_ACPI)
                 return 0;
-        if (pciehp_detect_acpi_slot(dev->subordinate))
+        if (acpi_pci_detect_ejectable(dev->subordinate))
                 return 0;
         return -ENODEV;
 }
@@ -135,6 +89,7 @@ static int __init dummy_probe(struct pcie_device *dev,
         u32 slot_cap;
         struct slot *slot, *tmp;
         struct pci_dev *pdev = dev->port;
+        struct pci_bus *pbus = pdev->subordinate;
         if (!(slot = kzalloc(sizeof(*slot), GFP_KERNEL)))
                 return -ENOMEM;
         /* Note: pciehp_detect_mode != PCIEHP_DETECT_ACPI here */
@@ -149,7 +104,7 @@ static int __init dummy_probe(struct pcie_device *dev,
                         dup_slot_id++;
         }
         list_add_tail(&slot->slot_list, &dummy_slots);
-        if (!acpi_slot_detected && pciehp_detect_acpi_slot(pdev->subordinate))
+        if (!acpi_slot_detected && acpi_pci_detect_ejectable(pbus))
                 acpi_slot_detected = 1;
         return -ENODEV;         /* dummy driver always returns error */
 }
diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index 871e096e0fbc..042c166f65d5 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -60,6 +60,15 @@ static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
         return acpi_get_pci_rootbridge_handle(pci_domain_nr(pdev->bus),
                         pdev->bus->number);
 }
+
+static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
+{
+        int seg = pci_domain_nr(pbus), busnr = pbus->number;
+        struct pci_dev *bridge = pbus->self;
+        if (bridge)
+                return DEVICE_ACPI_HANDLE(&(bridge->dev));
+        return acpi_get_pci_rootbridge_handle(seg, busnr);
+}
 #else
 #if !defined(AE_ERROR)
 typedef u32             acpi_status;
diff --git a/include/linux/pci_hotplug.h b/include/linux/pci_hotplug.h
index a00bd1a0f156..f7cc204fab07 100644
--- a/include/linux/pci_hotplug.h
+++ b/include/linux/pci_hotplug.h
@@ -228,6 +228,8 @@ extern acpi_status acpi_get_hp_params_from_firmware(struct pci_bus *bus,
                                 struct hotplug_params *hpp);
 int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags);
 int acpi_root_bridge(acpi_handle handle);
+int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle);
+int acpi_pci_detect_ejectable(struct pci_bus *pbus);
 #endif
 #endif