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Commit f17d9cbf authored by Matthew Garrett's avatar Matthew Garrett Committed by Len Brown
Browse files

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: default avatarMatthew Garrett <mjg@redhat.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 521cb40b

drivers/acpi/acpica/hwxface.c

+5 −5
Original line number Original line Diff line number Diff line
@@ -80,14 +80,14 @@ acpi_status acpi_reset(void) 




	if (reset_reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {

	if (reset_reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {

		/*

		/*

		 * For I/O space, write directly to the OSL. This bypasses the port

		 * For I/O space, write directly to the OSL. This

		 * validation mechanism, which may block a valid write to the reset

		 * bypasses the port validation mechanism, which may

		 * register.

		 * block a valid write to the reset register. Spec

		 * section 4.7.3.6 requires register width to be 8.

		 */

		 */

		status =

		status =

		    acpi_os_write_port((acpi_io_address) reset_reg->address,

		    acpi_os_write_port((acpi_io_address) reset_reg->address,

				       acpi_gbl_FADT.reset_value,

				       acpi_gbl_FADT.reset_value, 8);

				       reset_reg->bit_width);

	} else {

	} else {

		/* Write the reset value to the reset register */

		/* Write the reset value to the reset register */