ACPICA: Truncate I/O addresses to 16 bits for Windows compatibility

[linux-2.6-block.git] / drivers / acpi / acpica / nsinit.c

diff --git a/drivers/acpi/acpica/nsinit.c b/drivers/acpi/acpica/nsinit.c
index 9bd6f050f299ef55b545dac56a890d8f3219bc18..4e5272c313e0ce5be2d4ead501cb3f41bf9a3e07 100644 (file)
--- a/drivers/acpi/acpica/nsinit.c
+++ b/drivers/acpi/acpica/nsinit.c
@@ -193,6 +193,15 @@ acpi_status acpi_ns_initialize_devices(void)
                                        acpi_ns_init_one_device, NULL, &info,
                                        NULL);
 
+       /*
+        * Any _OSI requests should be completed by now. If the BIOS has
+        * requested any Windows OSI strings, we will always truncate
+        * I/O addresses to 16 bits -- for Windows compatibility.
+        */
+       if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) {
+               acpi_gbl_truncate_io_addresses = TRUE;
+       }
+
        ACPI_FREE(info.evaluate_info);
        if (ACPI_FAILURE(status)) {
                goto error_exit;