ACPICA: iasl: handle empty connection_node

ACPICA commit 6c551e2c9487067d4b085333e7fe97e965a11625

Link: acpica/acpica@6c551e2c
Signed-off-by: Aleksandrs Vinarskis <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

Author: alexVinarskis

drivers/acpi/acpica/exprep.c

@@ -437,6 +437,9 @@ acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info)
 
 		if (info->connection_node) {
 			second_desc = info->connection_node->object;
+			if (second_desc == NULL) {
+				break;
+			}
 			if (!(second_desc->common.flags & AOPOBJ_DATA_VALID)) {
 				status =
 				    acpi_ds_get_buffer_arguments(second_desc);