Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-10-25 22:44:30 +00:00
Code Issues Packages Projects Releases Wiki Activity

ACPICA: acpi_reset: Bypass port validation mechanism

Browse Source 
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>
This commit is contained in:
Bob Moore 2009-08-13 13:42:19 +08:00 committed by Len Brown
parent 1872bbc94b
commit 8a96423680
1 changed files with 15 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/acpi/acpica/hwxface.c
View File

@ -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);
}