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| author | Wim Van Sebroeck <wim@iguana.be> | 2007-05-01 06:53:01 +0000 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2007-05-01 06:53:01 +0000 |
| commit | 48a7afe314bfc4d7f50e1608632f503dbba7e013 (patch) | |
| tree | 4a80e6b96321a71affd1bacea817de93be08894b /drivers/acpi/tables/tbfadt.c | |
| parent | fb8f7ba077b5c665432082ab205bcd2cb01f6a3c (diff) | |
| parent | dc87c3985e9b442c60994308a96f887579addc39 (diff) | |
Merge /pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'drivers/acpi/tables/tbfadt.c')
| -rw-r--r-- | drivers/acpi/tables/tbfadt.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/acpi/tables/tbfadt.c b/drivers/acpi/tables/tbfadt.c index 807c7116e94..1db833eb241 100644 --- a/drivers/acpi/tables/tbfadt.c +++ b/drivers/acpi/tables/tbfadt.c @@ -347,6 +347,18 @@ static void acpi_tb_convert_fadt(void) acpi_gbl_xpm1b_enable.space_id = acpi_gbl_FADT.xpm1a_event_block.space_id; } + + /* + * For ACPI 1.0 FADTs, ensure that reserved fields (which should be zero) + * are indeed zero. This will workaround BIOSs that inadvertently placed + * values in these fields. + */ + if (acpi_gbl_FADT.header.revision < 3) { + acpi_gbl_FADT.preferred_profile = 0; + acpi_gbl_FADT.pstate_control = 0; + acpi_gbl_FADT.cst_control = 0; + acpi_gbl_FADT.boot_flags = 0; + } } /****************************************************************************** |