Hi Joonyoung,
Thank you for the patch.
On Friday 05 July 2013 15:32:35 Joonyoung Shim wrote:
> From drm gem CMA helper, it wasn't fixed dma_buf refcount problem fixed
> by commit 011c228. This patch solves it.
Please add a "Cc:stable@xxxxxxxxxxxxxxx" here.
> Signed-off-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/drm_gem_cma_helper.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c
> b/drivers/gpu/drm/drm_gem_cma_helper.c index ce06397..3f3a12b 100644
> --- a/drivers/gpu/drm/drm_gem_cma_helper.c
> +++ b/drivers/gpu/drm/drm_gem_cma_helper.c
> @@ -554,7 +554,6 @@ struct drm_gem_object *drm_gem_cma_dmabuf_import(struct
> drm_device *drm, * refcount on gem itself instead of f_count of dmabuf.
> */
> drm_gem_object_reference(obj);
> - dma_buf_put(dma_buf);
> return obj;
> }
> }
> @@ -573,6 +572,8 @@ struct drm_gem_object *drm_gem_cma_dmabuf_import(struct
> drm_device *drm, goto error_gem_free;
> }
>
> + get_dma_buf(dma_buf);
> +
As a side note, you have probably placed the get_dma_buf() call here to mimic
the drm_prime.c code, but would there be anything wrong by placing it right
before returning the GEM object ? The dma_buf_put() call could then be removed
from the error path.
> sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
> if (IS_ERR_OR_NULL(sgt)) {
> ret = sgt ? PTR_ERR(sgt) : -ENOMEM;
> @@ -597,6 +598,7 @@ error_buf_unmap:
> dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL);
> error_buf_detach:
> dma_buf_detach(dma_buf, attach);
> + dma_buf_put(dma_buf);
> error_gem_free:
> drm_gem_cma_free_object(&cma_obj->base);
> return ERR_PTR(ret);
--
Regards,
Laurent Pinchart
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