[Intel-gfx] [PATCH] drm/i915: Don't try to deref an unbound VMA

[Ben Widawsky]

This was actually correct in the original series, and is also fixed
later in the patch series, but was broken in this middle state.

I'm not really certain how I didn't hit it sooner.

This patch should be squashed into:
commit 8f588cfc349bbbd8ae62a13679b9efba41645064
Author: Ben Widawsky <ben at bwidawsk.net>
Date:   Wed Jul 17 12:19:03 2013 -0700

    drm/i915: Create VMAs

CC: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_gem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index a9fa2bb..c9487bb 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3314,7 +3314,7 @@ int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
 		return -EBUSY;
 	}
 
-	if (!i915_gem_valid_gtt_space(dev, &vma->node, cache_level)) {
+	if (vma && !i915_gem_valid_gtt_space(dev, &vma->node, cache_level)) {
 		ret = i915_gem_object_unbind(obj);
 		if (ret)
 			return ret;
-- 
1.8.3.3