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path: root/drivers/acpi/acpica/tbxfload.c
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Diffstat (limited to 'drivers/acpi/acpica/tbxfload.c')
-rw-r--r--drivers/acpi/acpica/tbxfload.c40
1 files changed, 39 insertions, 1 deletions
diff --git a/drivers/acpi/acpica/tbxfload.c b/drivers/acpi/acpica/tbxfload.c
index 86f1693f6d29..0782acf85722 100644
--- a/drivers/acpi/acpica/tbxfload.c
+++ b/drivers/acpi/acpica/tbxfload.c
@@ -268,6 +268,8 @@ ACPI_EXPORT_SYMBOL_INIT(acpi_install_table)
*
* PARAMETERS: table - Pointer to a buffer containing the ACPI
* table to be loaded.
+ * table_idx - Pointer to a u32 for storing the table
+ * index, might be NULL
*
* RETURN: Status
*
@@ -278,7 +280,7 @@ ACPI_EXPORT_SYMBOL_INIT(acpi_install_table)
* to ensure that the table is not deleted or unmapped.
*
******************************************************************************/
-acpi_status acpi_load_table(struct acpi_table_header *table)
+acpi_status acpi_load_table(struct acpi_table_header *table, u32 *table_idx)
{
acpi_status status;
u32 table_index;
@@ -297,6 +299,10 @@ acpi_status acpi_load_table(struct acpi_table_header *table)
status = acpi_tb_install_and_load_table(ACPI_PTR_TO_PHYSADDR(table),
ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
FALSE, &table_index);
+ if (table_idx) {
+ *table_idx = table_index;
+ }
+
if (ACPI_SUCCESS(status)) {
/* Complete the initialization/resolution of new objects */
@@ -390,3 +396,35 @@ acpi_status acpi_unload_parent_table(acpi_handle object)
}
ACPI_EXPORT_SYMBOL(acpi_unload_parent_table)
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_unload_table
+ *
+ * PARAMETERS: table_index - Index as returned by acpi_load_table
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Via the table_index representing an SSDT or OEMx table, unloads
+ * the table and deletes all namespace objects associated with
+ * that table. Unloading of the DSDT is not allowed.
+ * Note: Mainly intended to support hotplug removal of SSDTs.
+ *
+ ******************************************************************************/
+acpi_status acpi_unload_table(u32 table_index)
+{
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_unload_table);
+
+ if (table_index == 1) {
+
+ /* table_index==1 means DSDT is the owner. DSDT cannot be unloaded */
+
+ return_ACPI_STATUS(AE_TYPE);
+ }
+
+ status = acpi_tb_unload_table(table_index);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_unload_table)