[Bug 67198] [HSW Bisected]igt/gem_seqno_wrap randomly fail and cause system hang with call trace

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67198

lu hua <huax.lu at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|ben at bwidawsk.net            |przanoni at gmail.com
                 CC|                            |ben at bwidawsk.net
            Summary|[HSW]igt/gem_seqno_wrap     |[HSW
                   |randomly fail and cause     |Bisected]igt/gem_seqno_wrap
                   |system hang with call trace |randomly fail and cause
                   |                            |system hang with call trace

--- Comment #10 from lu hua <huax.lu at intel.com> ---
Bisect shows:221ab43e8abe1e395d4bdd475ee3d4c2548f04ca is the first bad commit
commit 221ab43e8abe1e395d4bdd475ee3d4c2548f04ca
Author:     Paulo Zanoni <paulo.r.zanoni at intel.com>
AuthorDate: Fri Jul 12 19:52:36 2013 -0300
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Fri Jul 19 18:05:14 2013 +0200

    drm/i915: don't read or write GEN6_PMIIR on Gen 5

    The register doesn't exist on Gen 5.

    v2: Simplify checks since pm_iir is always 0 on Gen 5 (Chris)

    Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
    Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

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