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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>
hifive-unleashed-5.1
Lv Zheng 2015-01-26 16:58:48 +08:00 committed by Rafael J. Wysocki
parent 97d746578b
commit e044d8f92f
4 changed files with 7 additions and 102 deletions
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44
drivers/acpi/acpica/nsxfobj.c
View File

@ -51,50 +51,6 @@
#define _COMPONENT ACPI_NAMESPACE
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

46
drivers/acpi/acpica/tbxface.c
View File

@ -263,52 +263,6 @@ acpi_get_table_header(char *signature,
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

13
drivers/pci/hotplug/sgi_hotplug.c
View File

@ -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 */
}
}

6
include/acpi/acpixf.h
View File

@ -890,12 +890,6 @@ ACPI_APP_DEPENDENT_RETURN_VOID(ACPI_PRINTF_LIKE(1)
*/
ACPI_GLOBAL(u8, acpi_gbl_permanent_mmap);
ACPI_EXTERNAL_RETURN_STATUS(acpi_status
acpi_get_id(acpi_handle object,
acpi_owner_id * out_type))
ACPI_EXTERNAL_RETURN_STATUS(acpi_status acpi_unload_table_id(acpi_owner_id id))
ACPI_EXTERNAL_RETURN_STATUS(acpi_status
acpi_get_table_with_size(acpi_string signature,
u32 instance,