From: Matthew Garrett Date: Fri, 11 Mar 2011 21:12:18 +0000 (-0500) Subject: ACPICA: Fix access width for reset vector X-Git-Tag: upstream/snapshot3+hdmi~10837^2~3^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f17d9cbf20c4734c4199caa6dee87047f2f8278f;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git 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 Signed-off-by: Len Brown --- diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c index 6f98d21..f75f81a 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 */