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drm/i915: Silence the WARN if the user tries to GTT mmap an incoherent object

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If the user tries to mmap through the GTT an object that is marked as
snooped, we report an error rather than allow the GPU to hang the
machine. The choice of EINVAL, however, was unfortunate as we turn that
into a WARN rather than a quiet SIGBUS.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2014-05-28 16:16:41 +01:00 committed by Daniel Vetter
parent dbb42748ac
commit ddeff6ee42
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/i915_gem.c
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@ -1427,7 +1427,7 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
/* Access to snoopable pages through the GTT is incoherent. */
if (obj->cache_level != I915_CACHE_NONE && !HAS_LLC(dev)) {
ret = -EINVAL;
ret = -EFAULT;
goto unlock;
}