diff options
Diffstat (limited to 'drivers/acpi/acpica/hwxface.c')
| -rw-r--r-- | drivers/acpi/acpica/hwxface.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c index f81fb068d20..b4b47db2dee 100644 --- a/drivers/acpi/acpica/hwxface.c +++ b/drivers/acpi/acpica/hwxface.c @@ -41,7 +41,8 @@ * POSSIBILITY OF SUCH DAMAGES. */ -#include <linux/export.h> +#define EXPORT_ACPI_INTERFACES + #include <acpi/acpi.h> #include "accommon.h" #include "acnamesp.h" @@ -83,11 +84,17 @@ 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. - * Spec section 4.7.3.6 requires register width to be 8. + * + * NOTE: + * The ACPI spec requires the reset register width to be 8, so we + * hardcode it here and ignore the FADT value. This maintains + * compatibility with other ACPI implementations that have allowed + * BIOS code with bad register width values to go unnoticed. */ status = acpi_os_write_port((acpi_io_address) reset_reg->address, - acpi_gbl_FADT.reset_value, 8); + acpi_gbl_FADT.reset_value, + ACPI_RESET_REGISTER_WIDTH); } else { /* Write the reset value to the reset register */ @@ -563,10 +570,10 @@ acpi_get_sleep_type_data(u8 sleep_state, u8 *sleep_type_a, u8 *sleep_type_b) break; } - cleanup1: +cleanup1: acpi_ut_remove_reference(info->return_object); - cleanup: +cleanup: if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "While evaluating Sleep State [%s]", |