Import ACPICA 20130927.

1 files changed, 9 insertions, 1 deletions

diff --git a/source/components/hardware/hwxface.c b/source/components/hardware/hwxface.c
index 45d5654..a1d5a04 100644
--- a/source/components/hardware/hwxface.c
+++ b/source/components/hardware/hwxface.c
@@ -41,6 +41,8 @@
  * POSSIBILITY OF SUCH DAMAGES.
  */
 
+#define EXPORT_ACPI_INTERFACES
+
 #include "acpi.h"
 #include "accommon.h"
 #include "acnamesp.h"
@@ -90,9 +92,15 @@ AcpiReset (
          * 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.
+         *
+         * 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 = AcpiOsWritePort ((ACPI_IO_ADDRESS) ResetReg->Address,
-                    AcpiGbl_FADT.ResetValue, ResetReg->BitWidth);
+            AcpiGbl_FADT.ResetValue, ACPI_RESET_REGISTER_WIDTH);
     }
     else
     {