[Bug 89816] Corruption with "sna: Mask the batch length"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89816

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Chris Wilson <chris at chris-wilson.co.uk> ---
It's a kernel bug; though the fix appears to have landed in the wrong queue:

commit 743e78c1d726d875b98ff9689cc77c4d3d5d9ae2
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Mar 27 11:02:10 2015 +0000

    drm/i915: Skip allocating shadow batch for 0-length batches

However, the amount of corruption is worrisome. There should be transient
corruptoin from the batch failure, but it should then fallback to software
rendering and so fix up the corruption. Something for me to investigate.

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