diff options
| -rw-r--r-- | drivers/acpi/acpica/hwxface.c | 10 | ||||
| -rw-r--r-- | drivers/acpi/reboot.c | 14 |
2 files changed, 14 insertions, 10 deletions
diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c index 6f98d210e71c..f75f81ad15c9 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 */ diff --git a/drivers/acpi/reboot.c b/drivers/acpi/reboot.c index 93f91142d7ad..a6c77e8b37bd 100644 --- a/drivers/acpi/reboot.c +++ b/drivers/acpi/reboot.c @@ -15,9 +15,15 @@ void acpi_reboot(void) rr = &acpi_gbl_FADT.reset_register; - /* Is the reset register supported? */ - if (!(acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) || - rr->bit_width != 8 || rr->bit_offset != 0) + /* ACPI reset register was only introduced with v2 of the FADT */ + + if (acpi_gbl_FADT.header.revision < 2) + return; + + /* Is the reset register supported? The spec says we should be + * checking the bit width and bit offset, but Windows ignores + * these fields */ + if (!(acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)) return; reset_value = acpi_gbl_FADT.reset_value; @@ -45,6 +51,4 @@ void acpi_reboot(void) acpi_reset(); break; } - /* Wait ten seconds */ - acpi_os_stall(10000000); } |