[Bug 95372] [BAT BYT] Sporadic failure from igt/gem_exec_flush at basic-batch-kernel-default-cmd

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95372

--- Comment #6 from david.s.gordon at intel.com ---
The second of the dmesg logs that Daniela posted contains the line:

[  313.349534] [drm:i915_parse_cmds] CMD: Command length exceeds batch length:
0x7FDEE770 length=114 batchlen=4

I can't see anywhere in the i-g-t tests that submits such a batch; firstly, the
length is not a multiple of 8, whereas we normally pad them to an even DWord,
and secondly, that hex number doesn't appear to be a valid instruction.

Is the parser perhaps picking up undefined data? That would explain why we see
these failures only on BYT, and only intermittently.

.Dave.

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