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drm/i915: disallow clip rects on gen5+ 

Unfortunately there has been dri1 userspace that used gem to manage
the gtt and hence also needed cliprects in the execbuf ioctl. So
we can't ever remove that code without breaking the ioctl abi.

But at least we can disable it on gen5+, because these horrible
versions of mesa have not supported these chips.

Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-04-26 23:28:11 +02:00
parent 09422b2e72
commit 6ebebc9206
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/i915/i915_gem_execbuffer.c
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@ -1116,6 +1116,11 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
return -EINVAL;
}
if (INTEL_INFO(dev)->gen >= 5) {
DRM_DEBUG("clip rectangles are only valid on pre-gen5\n");
return -EINVAL;
}
cliprects = kmalloc(args->num_cliprects * sizeof(*cliprects),
GFP_KERNEL);
if (cliprects == NULL) {