diff --git a/drivers/acpi/dispatcher/dsobject.c b/drivers/acpi/dispatcher/dsobject.c
index 1022e38994c2bffcdd8a52d676e9ecf951cc49f7..0f280589921025c5e8f9f4e8caebc3ea5efc21b0 100644
--- a/drivers/acpi/dispatcher/dsobject.c
+++ b/drivers/acpi/dispatcher/dsobject.c
@@ -496,7 +496,7 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
 			arg = arg->common.next;
 		}
 
-		ACPI_ERROR((AE_INFO,
+		ACPI_WARNING((AE_INFO,
 			    "Package List length (%X) larger than NumElements count (%X), truncated\n",
 			    i, element_count));
 	} else if (i < element_count) {
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index c3419182c9a72fd033b765f1d48e4ea14c11256c..775c97a282bd0d036bdcee72e192d502e8ba08ea 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -300,6 +300,8 @@ int __init acpi_table_init(void)
 
 static int __init acpi_parse_apic_instance(char *str)
 {
+	if (!str)
+		return -EINVAL;
 
 	acpi_apic_instance = simple_strtoul(str, NULL, 0);