From be8a42ae60addd8b6092535c11b42d099d6470ec Mon Sep 17 00:00:00 2001 From: Seung-Woo Kim Date: Thu, 27 Sep 2012 15:30:06 +0900 Subject: drm/prime: drop reference on imported dma-buf come from gem Increasing ref counts of both dma-buf and gem for imported dma-buf come from gem makes memory leak. release function of dma-buf cannot be called because f_count of dma-buf increased by importing gem and gem ref count cannot be decrease because of exported dma-buf. So I add dma_buf_put() for imported gem come from its own gem into each drivers having prime_import and prime_export capabilities. With this, only gem ref count is increased if importing gem exported from gem of same driver. Signed-off-by: Seung-Woo Kim Signed-off-by: Kyungmin.park Cc: Inki Dae Cc: Daniel Vetter Cc: Rob Clark Cc: Alex Deucher Cc: stable Signed-off-by: Dave Airlie --- drivers/gpu/drm/i915/i915_gem_dmabuf.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to '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 7be4241..abeaafe 100644 --- 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; } } -- cgit v1.1