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| author | Seung-Woo Kim <sw0312.kim@samsung.com> | 2012-09-27 15:30:06 +0900 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2013-01-08 14:41:53 +1000 |
| commit | be8a42ae60addd8b6092535c11b42d099d6470ec (patch) | |
| tree | f8fe5dc8c565f9ad02c7f129bf8ad091a4b0581e /drivers/gpu | |
| parent | f3215be950e40fede0dffb8534729fe0bf410727 (diff) | |
| download | op-kernel-dev-be8a42ae60addd8b6092535c11b42d099d6470ec.zip op-kernel-dev-be8a42ae60addd8b6092535c11b42d099d6470ec.tar.gz | |
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 <sw0312.kim@samsung.com>
Signed-off-by: Kyungmin.park <kyungmin.park@samsung.com>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Rob Clark <rob.clark@linaro.org>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_dmabuf.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_dmabuf.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_prime.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_prime.c | 1 |
4 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c index 315037a..9df9771 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c @@ -232,7 +232,12 @@ struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev, /* is it from our device? */ if (obj->dev == drm_dev) { + /* + * Importing dmabuf exported from out own gem increases + * refcount on gem itself instead of f_count of dmabuf. + */ drm_gem_object_reference(obj); + dma_buf_put(dma_buf); return obj; } } 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; } } diff --git a/drivers/gpu/drm/nouveau/nouveau_prime.c b/drivers/gpu/drm/nouveau/nouveau_prime.c index 3543fec..b8e05ae 100644 --- a/drivers/gpu/drm/nouveau/nouveau_prime.c +++ b/drivers/gpu/drm/nouveau/nouveau_prime.c @@ -193,6 +193,7 @@ struct drm_gem_object *nouveau_gem_prime_import(struct drm_device *dev, if (nvbo->gem) { if (nvbo->gem->dev == dev) { drm_gem_object_reference(nvbo->gem); + dma_buf_put(dma_buf); return nvbo->gem; } } diff --git a/drivers/gpu/drm/radeon/radeon_prime.c b/drivers/gpu/drm/radeon/radeon_prime.c index e095218..26c23bb 100644 --- a/drivers/gpu/drm/radeon/radeon_prime.c +++ b/drivers/gpu/drm/radeon/radeon_prime.c @@ -194,6 +194,7 @@ struct drm_gem_object *radeon_gem_prime_import(struct drm_device *dev, bo = dma_buf->priv; if (bo->gem_base.dev == dev) { drm_gem_object_reference(&bo->gem_base); + dma_buf_put(dma_buf); return &bo->gem_base; } } |
