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    SubjectRe: [3.0.y, 3.2.y, 3.3.y] Re: [PATCH 04/76] ACPICA: Fix regression in FADT revision checks
    From
    On Tue, Apr 3, 2012 at 3:58 PM, Jonathan Nieder <jrnieder@gmail.com> wrote:
    > Hi Greg,
    >
    > Josh Boyer wrote:
    >> On Fri, Mar 30, 2012 at 6:13 AM, Len Brown <lenb@kernel.org> wrote:
    >
    >>> From: Julian Anastasov <ja@ssi.bg>
    >>>
    >>>        commit 64b3db22c04586997ab4be46dd5a5b99f8a2d390 (2.6.39),
    >>> "Remove use of unreliable FADT revision field" causes regression
    >>> for old P4 systems because now cst_control and other fields are
    >>> not reset to 0.
    > [...]
    >>>        The fix is to update acpi_gbl_FADT.header.length after
    >>> the original value is used to check for old revisions.
    >>>
    >>> https://bugzilla.kernel.org/show_bug.cgi?id=42700
    >>> https://bugzilla.redhat.com/show_bug.cgi?id=727865
    >>>
    >>> Signed-off-by: Julian Anastasov <ja@ssi.bg>
    >>> Acked-by: Bob Moore <robert.moore@intel.com>
    >>> Signed-off-by: Len Brown <len.brown@intel.com>
    >>
    >> This one should go into the stable trees.
    >
    > Please apply
    >
    >  3e80acd1af40 "ACPICA: Fix regression in FADT revision checks"
    >
    > which is in linus's master to the 3.0.y, 3.2.y, and 3.3.y series to
    > fix this old boot problem.  (Many affected people disabled HT in the
    > BIOS to work around it in the meantime.)
    >
    > WZab (cc-ed) has tested that the patch addresses the problem when
    > applied to the 3.2.y and 3.3.y branches.  [1] has details.

    We've had this applied in Fedora on 3.2 and 3.3 for a while now as
    well.

    josh
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