drm/prime: drop reference on imported dma-buf come from gem

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / i915 / i915_gem_dmabuf.c

diff --git a/drivers/gpu/drm/i915/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
index 7be4241e824263efb8116533b680738ef74d449e..abeaafef6d7ef9986313be7ab8e0c2c5a992c065 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
@@ -266,7 +266,12 @@ struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
                obj = dma_buf->priv;
                /* is it from our device? */
                if (obj->base.dev == dev) {
+                       /*
+                        * Importing dmabuf exported from out own gem increases
+                        * refcount on gem itself instead of f_count of dmabuf.
+                        */
                        drm_gem_object_reference(&obj->base);
+                       dma_buf_put(dma_buf);
                        return &obj->base;
                }
        }