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-rw-r--r--drivers/acpi/acpica/dswload.c31
1 files changed, 20 insertions, 11 deletions
diff --git a/drivers/acpi/acpica/dswload.c b/drivers/acpi/acpica/dswload.c
index 9cc2289f872..b40513dd6a6 100644
--- a/drivers/acpi/acpica/dswload.c
+++ b/drivers/acpi/acpica/dswload.c
@@ -1052,9 +1052,22 @@ acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
}
/*
- * If we are executing a method, initialize the region
+ * The op_region is not fully parsed at this time. The only valid
+ * argument is the space_id. (We must save the address of the
+ * AML of the address and length operands)
+ *
+ * If we have a valid region, initialize it. The namespace is
+ * unlocked at this point.
+ *
+ * Need to unlock interpreter if it is locked (if we are running
+ * a control method), in order to allow _REG methods to be run
+ * during acpi_ev_initialize_region.
*/
if (walk_state->method_node) {
+ /*
+ * Executing a method: initialize the region and unlock
+ * the interpreter
+ */
status =
acpi_ex_create_region(op->named.data,
op->named.length,
@@ -1063,21 +1076,17 @@ acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
if (ACPI_FAILURE(status)) {
return (status);
}
- }
- /*
- * The op_region is not fully parsed at this time. Only valid
- * argument is the space_id. (We must save the address of the
- * AML of the address and length operands)
- */
+ acpi_ex_exit_interpreter();
+ }
- /*
- * If we have a valid region, initialize it
- * Namespace is NOT locked at this point.
- */
status =
acpi_ev_initialize_region
(acpi_ns_get_attached_object(node), FALSE);
+ if (walk_state->method_node) {
+ acpi_ex_enter_interpreter();
+ }
+
if (ACPI_FAILURE(status)) {
/*
* If AE_NOT_EXIST is returned, it is not fatal