[Bug 108782] Android: i965/brw_draw affected by segfault in intel_disable_rb_aux_buffer()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108782

--- Comment #2 from Mauro Rossi <issor.oruam at gmail.com> ---
The HW is Lenovo T460 with Intel HD Graphics 530 (Skylake GT2)

As other info I'm using kernels 4.19 and 4.20rc, latest libdrm and the problem
appears in both mesa 18.3 branch and in master

Do you have any significant changes to deal with separate RenderThread in
Android-IA(Celadon)?

I've also tried to comment the if (rendering) {...} at line 532 in brw_draw.c,
but, obviously, I get the same result textures are rendered 'black',
do you know if bool rendering effectively represent all cases where
intel_disable_rb_aux_buffer() should be called
or if there are some factors to take into account?

What should be the behavior in brw_draw.c @line 366 when irb->mt is null and
evaluation of irb->mt->bo causes the segfault?

Available for testing patches/hacks.

Mauro

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