diff options
| author | Imre Deak <imre.deak@intel.com> | 2013-04-19 11:11:56 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2013-05-01 09:40:21 +1000 |
| commit | 011c2282c74db120f01a8414edc66c3f217f5511 (patch) | |
| tree | 5e43eb6b5d21e8aa29e88f0398fcdd7ca55abdb5 /drivers/gpu/drm/exynos | |
| parent | 219b47339ced80ca580bb6ce7d1636166984afa7 (diff) | |
drm: prime: fix refcounting on the dmabuf import error path
In commit be8a42ae60 we inroduced a refcount problem, where on the
drm_gem_prime_fd_to_handle() error path we'll call dma_buf_put() for
self imported dma buffers.
Fix this by taking a reference on the dma buffer in the .gem_import
hook instead of assuming the caller had taken one. Besides fixing the
bug this is also more logical.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/exynos')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_dmabuf.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c index ba0a3aa7854..ff7f2a886a3 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c @@ -235,7 +235,6 @@ struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev, * refcount on gem itself instead of f_count of dmabuf. */ drm_gem_object_reference(obj); - dma_buf_put(dma_buf); return obj; } } @@ -244,6 +243,7 @@ struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev, if (IS_ERR(attach)) return ERR_PTR(-EINVAL); + get_dma_buf(dma_buf); sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); if (IS_ERR_OR_NULL(sgt)) { @@ -298,6 +298,8 @@ err_unmap_attach: dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL); err_buf_detach: dma_buf_detach(dma_buf, attach); + dma_buf_put(dma_buf); + return ERR_PTR(ret); } |