[Bug 78274] [BDW Regression]BUG: unable to handle kernel paging request at ffffc900110a0000

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78274

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

           What    |Removed                     |Added
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           Assignee|przanoni at gmail.com          |ben at bwidawsk.net
                 CC|                            |przanoni at gmail.com

--- Comment #2 from lu hua <huax.lu at intel.com> ---
Bisect shows: 78325f2d270897c9ee0887125b7abb963eb8efea is the first bad commit
commit 78325f2d270897c9ee0887125b7abb963eb8efea
Author:     Ben Widawsky <benjamin.widawsky at intel.com>
AuthorDate: Tue Apr 29 14:52:29 2014 -0700
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Mon May 5 10:56:53 2014 +0200

    drm/i915: Virtualize the ringbuffer signal func

    This abstraction again is in preparation for gen8. Gen8 will bring new
    semantics for doing this operation.

    While here, make the writes of MI_NOOPs explicit for non-existent rings.
    This should have been implicit before.

    NOTE: This is going to be removed in a few patches.

    Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
    Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

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