diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/exoparg1.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/acpi/acpica/exoparg1.c b/drivers/acpi/acpica/exoparg1.c index fb8772df865b..fe2f9d95d0f8 100644 --- a/drivers/acpi/acpica/exoparg1.c +++ b/drivers/acpi/acpica/exoparg1.c @@ -970,10 +970,17 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state) */ return_desc = *(operand[0]->reference.where); - if (return_desc) { - acpi_ut_add_reference - (return_desc); + if (!return_desc) { + /* + * Element is NULL, do not allow the dereference. + * This provides compatibility with other ACPI + * implementations. + */ + return_ACPI_STATUS + (AE_AML_UNINITIALIZED_ELEMENT); } + + acpi_ut_add_reference(return_desc); break; default: |