If there is no mappable GGTT aperture, trying to use it for
copy_(from|to)_user is a dangerous experience. Report ENODEV to indicate
the operation is not supported to the upper layer.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index bb0c12975f38..a1f1ffe18682 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -61,6 +61,9 @@ insert_mappable_node(struct i915_ggtt *ggtt, struct drm_mm_node *node, u32 size)
{
int err;
+ if (!i915_ggtt_has_aperture(ggtt))
+ return -ENODEV;
+
err = mutex_lock_interruptible(&ggtt->vm.mutex);
if (err)
return err;
--
2.20.1
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