ACPICA: Ignore ACPI table signature for Load() operator
Only "SSDT" is acceptable to the ACPI spec, but tables are
seen with OEMx and null sigs. Therefore, signature validation
is worthless. Apparently MS ACPI accepts such signatures, ACPICA
must be compatible.
http://bugzilla.kernel.org/show_bug.cgi?id=10454
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>
diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c
index 402f93e..5336ce8 100644
--- a/drivers/acpi/tables/tbinstal.c
+++ b/drivers/acpi/tables/tbinstal.c
@@ -123,24 +123,13 @@
}
}
- /* The table must be either an SSDT or a PSDT or an OEMx */
-
- if (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_PSDT)&&
- !ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT)&&
- strncmp(table_desc->pointer->signature, "OEM", 3)) {
- /* Check for a printable name */
- if (acpi_ut_valid_acpi_name(
- *(u32 *) table_desc->pointer->signature)) {
- ACPI_ERROR((AE_INFO, "Table has invalid signature "
- "[%4.4s], must be SSDT or PSDT",
- table_desc->pointer->signature));
- } else {
- ACPI_ERROR((AE_INFO, "Table has invalid signature "
- "(0x%8.8X), must be SSDT or PSDT",
- *(u32 *) table_desc->pointer->signature));
- }
- return_ACPI_STATUS(AE_BAD_SIGNATURE);
- }
+ /*
+ * Originally, we checked the table signature for "SSDT" or "PSDT" here.
+ * Next, we added support for OEMx tables, signature "OEM".
+ * Valid tables were encountered with a null signature, so we've just
+ * given up on validating the signature, since it seems to be a waste
+ * of code. The original code was removed (05/2008).
+ */
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);