[Intel-gfx] [PATCH] drm/i915: Don't allow objects to get bound while VT switched.

[Eric Anholt]

This avoids a BUG_ON in the enter_vt path due to objects being in the GTT
when we shouldn't have ever let them be (as we're not supposed to touch the
device during that time).

This was triggered by a change in the 2D driver to use the GTT mapping of
objects after pinning them to improve software fallback performance.

Signed-off-by: Eric Anholt <eric at anholt.net>
---
 drivers/gpu/drm/i915/i915_gem.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 24fe8c1..c3eb5c4 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1161,6 +1161,8 @@ i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment)
 	struct drm_mm_node *free_space;
 	int page_count, ret;
 
+	if (dev_priv->mm.suspended)
+		return -EBUSY;
 	if (alignment == 0)
 		alignment = PAGE_SIZE;
 	if (alignment & (PAGE_SIZE - 1)) {
-- 
1.5.6.5