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drm/i915: Do not allow unwedging following a failed driver initialisation

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If we declare the driver wedged during early initialisation, we leave
the driver in an undefined state (with respect to GEM execution). As
this leads to unexpected behaviour if we allow the user to unwedge the
device (through debugfs, and performed by igt at test start), do not.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190103213340.1669-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2019-01-03 21:33:40 +00:00
parent 55277e1f31
commit 55c15512a9
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_gem.c
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@@ -3380,6 +3380,9 @@ bool i915_gem_unset_wedged(struct drm_i915_private *i915)
if (!test_bit(I915_WEDGED, &i915->gpu_error.flags))
return true;
if (!i915->gt.scratch) /* Never full initialised, recovery impossible */
return false;
GEM_TRACE("start\n");
/*