diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/tbfadt.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c index 428d44e2d16..6f5588e62c0 100644 --- a/drivers/acpi/acpica/tbfadt.c +++ b/drivers/acpi/acpica/tbfadt.c @@ -384,8 +384,11 @@ static void acpi_tb_convert_fadt(void) * * The ACPI 1.0 reserved fields that will be zeroed are the bytes located at * offset 45, 55, 95, and the word located at offset 109, 110. + * + * Note: The FADT revision value is unreliable. Only the length can be + * trusted. */ - if (acpi_gbl_FADT.header.revision < FADT2_REVISION_ID) { + if (acpi_gbl_FADT.header.length <= ACPI_FADT_V2_SIZE) { acpi_gbl_FADT.preferred_profile = 0; acpi_gbl_FADT.pstate_control = 0; acpi_gbl_FADT.cst_control = 0; |