[PATCH 2/3] ACPICA: Fix access width for reset vector

Matthew Garrett
2010-12-09T21:46:43Z

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>
---
drivers/acpi/acpica/hwxface.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c
index 50cc3be..c6a4e63 100644
--- a/drivers/acpi/acpica/hwxface.c
+++ b/drivers/acpi/acpica/hwxface.c
@@ -82,12 +82,11 @@ acpi_status acpi_reset(void)
/*
* 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.
+ * 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 */

--
1.7.3.2