ACPICA: Add new external interface, acpi_unload_table()

ACPICA commit c69369cd9cf0134e1aac516e97d612947daa8dc2

Unload a table via the table_index.

Link: https://github.com/acpica/acpica/commit/c69369cd
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpica/tbxfload.c b/drivers/acpi/acpica/tbxfload.c
index 86f1693f6d29a8f5ae36d8abf84d288059994c9f..ce86e7945e909bf22a3e0926d467b241f2553c8e 100644 (file)
--- a/drivers/acpi/acpica/tbxfload.c
+++ b/drivers/acpi/acpica/tbxfload.c
@@ -390,3 +390,35 @@ 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)

diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index e5e0414135818dd6bad81942153523c4b16d0319..109b2f14b6c662f024ef9a872023f14f4aa87d71 100644 (file)
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -460,6 +460,9 @@ ACPI_EXTERNAL_RETURN_STATUS(acpi_status ACPI_INIT_FUNCTION
 ACPI_EXTERNAL_RETURN_STATUS(acpi_status
                            acpi_load_table(struct acpi_table_header *table))
 
+ACPI_EXTERNAL_RETURN_STATUS(acpi_status
+                           acpi_unload_table(u32 table_index))
+
 ACPI_EXTERNAL_RETURN_STATUS(acpi_status
                            acpi_unload_parent_table(acpi_handle object))