diff options
Diffstat (limited to 'drivers/acpi/acpica/hwregs.c')
| -rw-r--r-- | drivers/acpi/acpica/hwregs.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/acpi/acpica/hwregs.c b/drivers/acpi/acpica/hwregs.c index 3de794bcf8fa..69603ba52a3a 100644 --- a/drivers/acpi/acpica/hwregs.c +++ b/drivers/acpi/acpica/hwregs.c @@ -528,13 +528,18 @@ acpi_status acpi_hw_register_read(u32 register_id, u32 *return_value) status = acpi_hw_read(&value64, &acpi_gbl_FADT.xpm2_control_block); - value = (u32)value64; + if (ACPI_SUCCESS(status)) { + value = (u32)value64; + } break; case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ status = acpi_hw_read(&value64, &acpi_gbl_FADT.xpm_timer_block); - value = (u32)value64; + if (ACPI_SUCCESS(status)) { + value = (u32)value64; + } + break; case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ |