drm/i915: Dont enable CS_PARSER_ERROR interrupts at all
authorDaniel Vetter <daniel.vetter@ffwll.ch>
Wed, 1 Apr 2015 11:43:46 +0000 (13:43 +0200)
committerJani Nikula <jani.nikula@intel.com>
Tue, 14 Apr 2015 14:03:12 +0000 (17:03 +0300)
commit37ef01ab5d24d1d520dc79f6a98099d451c2a901
treeed1e53e3d615e3189d81151e03ed7eec350b57e0
parente0d6149b3debce1a7e17dfda7c2829935917dc58
drm/i915: Dont enable CS_PARSER_ERROR interrupts at all

We stopped handling them in

commit aaecdf611a05cac26a94713bad25297e60225c29
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Nov 4 15:52:22 2014 +0100

    drm/i915: Stop gathering error states for CS error interrupts

but just clearing is apparently not enough: A sufficiently dead gpu
left behind by firmware (*cough* coreboot *cough*) can keep the gpu in
an endless loop of such interrupts, eventually leading to the nmi
firing. And definitely to what looks like a machine hang.

Since we don't even enable these interrupts on gen5+ let's do the same
on earlier platforms.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=93171
Tested-by: Mono <mono-for-kernel-org@donderklumpen.de>
Tested-by: info@gluglug.org.uk
Cc: stable@vger.kernel.org
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
drivers/gpu/drm/i915/i915_irq.c