[Bug 104945] [CI] igt at gem_* - incomplete - GEM_BUG_ON(buf[2 * head + 1] != port->context_id) - kernel BUG at drivers/gpu/drm/i915/intel_lrc.c:869!

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104945

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

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

--- Comment #10 from Chris Wilson <chris at chris-wilson.co.uk> ---
Found a related bug,

commit 963ddd63c314e9b5d9cd999873d473a93aed5380
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Mar 2 11:33:24 2018 +0000

    drm/i915: Suspend submission tasklets around wedging

where the port->context_id was being reset with tasklet in flight on wedging.
Which then uncovered the problem in bug 105341 (previously seen in the kasan
runs). I _think_ this GEM_BUG_ON(CSB[] != port->context_id) is resolved. Just
the can of worms got larger.

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