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< * 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).
---
> * Validate the incoming table signature.
> *
> * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
> * 2) We added support for OEMx tables, signature "OEM".
> * 3) Valid tables were encountered with a null signature, so we just
> * gave up on validating the signature, (05/2008).
> * 4) We encountered non-AML tables such as the MADT, which caused
> * interpreter errors and kernel faults. So now, we once again allow
> * only "SSDT", "OEMx", and now, also a null signature. (05/2011).
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> if ((TableDesc->Pointer->Signature[0] != 0x00) &&
> (!ACPI_COMPARE_NAME (TableDesc->Pointer->Signature, ACPI_SIG_SSDT)) &&
> (ACPI_STRNCMP (TableDesc->Pointer->Signature, "OEM", 3)))
> {
> ACPI_ERROR ((AE_INFO,
> "Table has invalid signature [%4.4s] (0x%8.8X), must be SSDT or OEMx",
> AcpiUtValidAcpiName (*(UINT32 *) TableDesc->Pointer->Signature) ?
> TableDesc->Pointer->Signature : "????",
> *(UINT32 *) TableDesc->Pointer->Signature));
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> return_ACPI_STATUS (AE_BAD_SIGNATURE);
> }
>