1 files changed, 0 insertions, 5 deletions

diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c
index 3c8c0232ce43..5641b9c8d50c 100644
--- a/drivers/base/dma-buf.c
+++ b/drivers/base/dma-buf.c
@@ -258,9 +258,7 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,
         if (WARN_ON(!attach || !attach->dmabuf))
                 return ERR_PTR(-EINVAL);
 
-        mutex_lock(&attach->dmabuf->lock);
         sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);
-        mutex_unlock(&attach->dmabuf->lock);
 
         return sg_table;
 }
@@ -282,10 +280,7 @@ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,
         if (WARN_ON(!attach || !attach->dmabuf || !sg_table))
                 return;
 
-        mutex_lock(&attach->dmabuf->lock);
         attach->dmabuf->ops->unmap_dma_buf(attach, sg_table,
                                                 direction);
-        mutex_unlock(&attach->dmabuf->lock);
-
 }
 EXPORT_SYMBOL_GPL(dma_buf_unmap_attachment);