diff options
| author | Bob Moore <robert.moore@intel.com> | 2009-08-13 13:42:19 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-08-28 19:40:39 -0400 |
| commit | 8a964236800839263b3dddd7f7851d666e7d53e1 (patch) | |
| tree | fde7e01148c8d1db1866e66feb4f13c5b85b60df /drivers/acpi/acpica | |
| parent | 1872bbc94b2d092ece22a8fbf1c3e81f0fba0052 (diff) | |
| download | linux-8a964236800839263b3dddd7f7851d666e7d53e1.tar.bz2 | |
ACPICA: acpi_reset: Bypass port validation mechanism
Allow writes to reserved ports. This change may eventually be
driven down in to acpi_write and acpi_read.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica')
| -rw-r--r-- | drivers/acpi/acpica/hwxface.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c index 4ead85f29215..647c7b6e6756 100644 --- a/drivers/acpi/acpica/hwxface.c +++ b/drivers/acpi/acpica/hwxface.c @@ -78,9 +78,22 @@ acpi_status acpi_reset(void) return_ACPI_STATUS(AE_NOT_EXIST); } - /* Write the reset value to the reset register */ + 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. + */ + status = + acpi_os_write_port((acpi_io_address) reset_reg->address, + acpi_gbl_FADT.reset_value, + reset_reg->bit_width); + } else { + /* Write the reset value to the reset register */ + + status = acpi_hw_write(acpi_gbl_FADT.reset_value, reset_reg); + } - status = acpi_hw_write(acpi_gbl_FADT.reset_value, reset_reg); return_ACPI_STATUS(status); } |