ACPI: Introduce acpi_unload_parent_table() usages in Linux kernel

ACPICA has implemented acpi_unload_parent_table() which can exactly replace
the acpi_get_id()/acpi_unload_table_id() implemented in Linux kernel.  The
acpi_unload_parent_table() has been unit tested in ACPICA simulation
environment.

This patch can also help to reduce the source code differences between
Linux and ACPICA.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

3 files changed, 7 insertions, 96 deletions

diff --git a/drivers/acpi/acpica/nsxfobj.c b/drivers/acpi/acpica/nsxfobj.c
index dae9401be7a2..51a83298c18d 100644
--- a/drivers/acpi/acpica/nsxfobj.c
+++ b/drivers/acpi/acpica/nsxfobj.c
@@ -53,50 +53,6 @@ ACPI_MODULE_NAME("nsxfobj")
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_get_id
- *
- * PARAMETERS:  Handle          - Handle of object whose id is desired
- *              ret_id          - Where the id will be placed
- *
- * RETURN:      Status
- *
- * DESCRIPTION: This routine returns the owner id associated with a handle
- *
- ******************************************************************************/
-acpi_status acpi_get_id(acpi_handle handle, acpi_owner_id * ret_id)
-{
-        struct acpi_namespace_node *node;
-        acpi_status status;
-
-        /* Parameter Validation */
-
-        if (!ret_id) {
-                return (AE_BAD_PARAMETER);
-        }
-
-        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
-        if (ACPI_FAILURE(status)) {
-                return (status);
-        }
-
-        /* Convert and validate the handle */
-
-        node = acpi_ns_validate_handle(handle);
-        if (!node) {
-                (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-                return (AE_BAD_PARAMETER);
-        }
-
-        *ret_id = node->owner_id;
-
-        status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-        return (status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_get_id)
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_get_type
  *
  * PARAMETERS:  handle          - Handle of object whose type is desired
diff --git a/drivers/acpi/acpica/tbxface.c b/drivers/acpi/acpica/tbxface.c
index 9520ae19bb37..0f9dd80b1cdd 100644
--- a/drivers/acpi/acpica/tbxface.c
+++ b/drivers/acpi/acpica/tbxface.c
@@ -265,52 +265,6 @@ ACPI_EXPORT_SYMBOL(acpi_get_table_header)
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_unload_table_id
- *
- * PARAMETERS:  id            - Owner ID of the table to be removed.
- *
- * RETURN:      Status
- *
- * DESCRIPTION: This routine is used to force the unload of a table (by id)
- *
- ******************************************************************************/
-acpi_status acpi_unload_table_id(acpi_owner_id id)
-{
-        int i;
-        acpi_status status = AE_NOT_EXIST;
-
-        ACPI_FUNCTION_TRACE(acpi_unload_table_id);
-
-        status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
-        if (ACPI_FAILURE(status)) {
-                return_ACPI_STATUS(status);
-        }
-
-        /* Find table in the global table list */
-        for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
-                if (id != acpi_gbl_root_table_list.tables[i].owner_id) {
-                        continue;
-                }
-                /*
-                 * Delete all namespace objects owned by this table. Note that these
-                 * objects can appear anywhere in the namespace by virtue of the AML
-                 * "Scope" operator. Thus, we need to track ownership by an ID, not
-                 * simply a position within the hierarchy
-                 */
-                acpi_tb_delete_namespace_by_owner(i);
-                status = acpi_tb_release_owner_id(i);
-                acpi_tb_set_table_loaded_flag(i, FALSE);
-                break;
-        }
-
-        (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
-        return_ACPI_STATUS(status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_unload_table_id)
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_get_table_with_size
  *
  * PARAMETERS:  signature           - ACPI signature of needed table
diff --git a/drivers/pci/hotplug/sgi_hotplug.c b/drivers/pci/hotplug/sgi_hotplug.c
index bada20999870..c32fb786d48e 100644
--- a/drivers/pci/hotplug/sgi_hotplug.c
+++ b/drivers/pci/hotplug/sgi_hotplug.c
@@ -475,7 +475,7 @@ static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
         struct slot *slot = bss_hotplug_slot->private;
         struct pci_dev *dev, *temp;
         int rc;
-        acpi_owner_id ssdt_id = 0;
+        acpi_handle ssdt_hdl = NULL;
 
         /* Acquire update access to the bus */
         mutex_lock(&sn_hotplug_mutex);
@@ -522,7 +522,7 @@ static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
                         if (ACPI_SUCCESS(ret) &&
                             (adr>>16) == (slot->device_num + 1)) {
                                 /* retain the owner id */
-                                acpi_get_id(chandle, &ssdt_id);
+                                ssdt_hdl = chandle;
 
                                 ret = acpi_bus_get_device(chandle,
                                                           &device);
@@ -547,12 +547,13 @@ static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
         pci_unlock_rescan_remove();
 
         /* Remove the SSDT for the slot from the ACPI namespace */
-        if (SN_ACPI_BASE_SUPPORT() && ssdt_id) {
+        if (SN_ACPI_BASE_SUPPORT() && ssdt_hdl) {
                 acpi_status ret;
-                ret = acpi_unload_table_id(ssdt_id);
+                ret = acpi_unload_parent_table(ssdt_hdl);
                 if (ACPI_FAILURE(ret)) {
-                        printk(KERN_ERR "%s: acpi_unload_table_id failed (0x%x) for id %d\n",
-                               __func__, ret, ssdt_id);
+                        acpi_handle_err(ssdt_hdl,
+                                        "%s: acpi_unload_parent_table failed (0x%x)\n",
+                                        __func__, ret);
                         /* try to continue on */
                 }
         }