diff options
| author | Matthew Garrett <mjg@redhat.com> | 2011-03-11 16:12:18 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2011-03-22 23:51:59 -0400 |
| commit | f17d9cbf20c4734c4199caa6dee87047f2f8278f (patch) | |
| tree | e0392f20c36d010aff18b2e705d07eaac4231852 /drivers/acpi | |
| parent | 521cb40b0c44418a4fd36dc633f575813d59a43d (diff) | |
| download | linux-f17d9cbf20c4734c4199caa6dee87047f2f8278f.tar.gz linux-f17d9cbf20c4734c4199caa6dee87047f2f8278f.tar.bz2 linux-f17d9cbf20c4734c4199caa6dee87047f2f8278f.zip | |
ACPICA: Fix access width for reset vector
Section 4.7.3.6 of the ACPI specification requires that the register width
of the reset vector be 8 bits. Windows simply hardcodes the access to be
a byte and ignores the width provided in the FADT, so make sure that we
do the same.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/hwxface.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c index 6f98d210e71c..f75f81ad15c9 100644 --- a/drivers/acpi/acpica/hwxface.c +++ b/drivers/acpi/acpica/hwxface.c @@ -80,14 +80,14 @@ acpi_status acpi_reset(void) if (reset_reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) { /* - * For I/O space, write directly to the OSL. This bypasses the port - * validation mechanism, which may block a valid write to the reset - * register. + * For I/O space, write directly to the OSL. This + * bypasses the port validation mechanism, which may + * block a valid write to the reset register. Spec + * section 4.7.3.6 requires register width to be 8. */ status = acpi_os_write_port((acpi_io_address) reset_reg->address, - acpi_gbl_FADT.reset_value, - reset_reg->bit_width); + acpi_gbl_FADT.reset_value, 8); } else { /* Write the reset value to the reset register */ |