https://bugzilla.kernel.org/show_bug.cgi?id=25992


Zhang Rui <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |[email protected]
                   |                            |orge.net
         AssignedTo|acpi_acpica-c...@kernel-bug |[email protected]
                   |s.osdl.org                  |




--- Comment #4 from Zhang Rui <[email protected]>  2011-01-04 01:49:43 ---
this is caused by the buggy AML/BIOS code.

        Method (GTFB, 2, Serialized)
        {
            Multiply (CMDC, 0x38, Local0)
            CreateField (SCBF, Local0, 0x38, CMDX)
            Multiply (CMDC, 0x07, Local0)
            CreateByteField (SCBF, Add (Local0, 0x01), A001)
            Store (Arg0, CMDX)
            Store (Arg1, A001)
            Increment (CMDC)
        }
GTFB is invoked in the _SDD method. and CMDC is increased every time _SDD is
invoked. This is apparently wrong, because _SDD may be invoked for many times,
which means that the error message in comment #0 may occur sooner or later.

You can use boot option "libata.noacpi" to workaround this problem.

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