From: Ben Widawsky Date: Wed, 14 Aug 2013 01:09:06 +0000 (-0700) Subject: drm/i915: Remove node only when allocated X-Git-Tag: firefly_0821_release~176^2~5263^2~28^2~41 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=433544bd25b06cb6dcdb79b6da8d748a0220898e;p=firefly-linux-kernel-4.4.55.git drm/i915: Remove node only when allocated VMAs can be created and not bound. One may think of it as lazy cleanup, and safely gloss over the conditions which manufacture it. In either case, when the object backing the i915 vma is destroyed, we must cleanup the vma without stumbling into a bunch of pitfalls that assume the vma is bound. NOTE: I was pretty certain the above condition could only happen when we introduced the use of VMAs being looked up at execbuf, and already existing. Paulo has hit this though, so I must be missing something. As I believe the patch is correct anyway, therefore I won't scratch my head too hard. v2: use goto destroy as a compromise (Chris) Cc: Chris Wilson Cc: Paulo Zanoni Signed-off-by: Ben Widawsky Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 5f48ecc77ec2..910fbaff0e99 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2619,6 +2619,9 @@ int i915_vma_unbind(struct i915_vma *vma) if (list_empty(&vma->vma_link)) return 0; + if (!drm_mm_node_allocated(&vma->node)) + goto destroy; + if (obj->pin_count) return -EBUSY; @@ -2656,6 +2659,8 @@ int i915_vma_unbind(struct i915_vma *vma) obj->map_and_fenceable = true; drm_mm_remove_node(&vma->node); + +destroy: i915_gem_vma_destroy(vma); /* Since the unbound list is global, only move to that list if