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path: root/drivers/base/dma-buf.c
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Diffstat (limited to 'drivers/base/dma-buf.c')
-rw-r--r--drivers/base/dma-buf.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c
index 965833acf0d2..198edd8a9f0a 100644
--- a/drivers/base/dma-buf.c
+++ b/drivers/base/dma-buf.c
@@ -185,7 +185,7 @@ struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
struct dma_buf_attachment *attach;
int ret;
- if (WARN_ON(!dmabuf || !dev || !dmabuf->ops))
+ if (WARN_ON(!dmabuf || !dev))
return ERR_PTR(-EINVAL);
attach = kzalloc(sizeof(struct dma_buf_attachment), GFP_KERNEL);
@@ -224,7 +224,7 @@ EXPORT_SYMBOL_GPL(dma_buf_attach);
*/
void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)
{
- if (WARN_ON(!dmabuf || !attach || !dmabuf->ops))
+ if (WARN_ON(!dmabuf || !attach))
return;
mutex_lock(&dmabuf->lock);
@@ -255,12 +255,11 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,
might_sleep();
- if (WARN_ON(!attach || !attach->dmabuf || !attach->dmabuf->ops))
+ if (WARN_ON(!attach || !attach->dmabuf))
return ERR_PTR(-EINVAL);
mutex_lock(&attach->dmabuf->lock);
- if (attach->dmabuf->ops->map_dma_buf)
- sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);
+ sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);
mutex_unlock(&attach->dmabuf->lock);
return sg_table;
@@ -278,13 +277,11 @@ EXPORT_SYMBOL_GPL(dma_buf_map_attachment);
void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,
struct sg_table *sg_table)
{
- if (WARN_ON(!attach || !attach->dmabuf || !sg_table
- || !attach->dmabuf->ops))
+ if (WARN_ON(!attach || !attach->dmabuf || !sg_table))
return;
mutex_lock(&attach->dmabuf->lock);
- if (attach->dmabuf->ops->unmap_dma_buf)
- attach->dmabuf->ops->unmap_dma_buf(attach, sg_table);
+ attach->dmabuf->ops->unmap_dma_buf(attach, sg_table);
mutex_unlock(&attach->dmabuf->lock);
}