drm/i915: Only refcount ppgtt if it actually is one
This essentially unbreaks non-ppgtt operation where we'd scribble over
random memory.
While at it give the vm_to_ppgtt function a proper prefix and make it
a bit more paranoid.
Reviewed-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 8061d45..e3e30cd 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4485,7 +4485,8 @@
vm = vma->vm;
- i915_ppgtt_put(vm_to_ppgtt(vm));
+ if (!i915_is_ggtt(vm))
+ i915_ppgtt_put(i915_vm_to_ppgtt(vm));
list_del(&vma->vma_link);