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authorMatthew Garrett <mjg@redhat.com>2011-03-11 16:12:18 -0500
committerLen Brown <len.brown@intel.com>2011-03-22 23:51:59 -0400
commitf17d9cbf20c4734c4199caa6dee87047f2f8278f (patch)
treee0392f20c36d010aff18b2e705d07eaac4231852 /drivers/acpi
parent521cb40b0c44418a4fd36dc633f575813d59a43d (diff)
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.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c
index 6f98d210e71..f75f81ad15c 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 */