dma-buf: Move code out of mutex-protected section in dma_buf_attach()

Some fields can be set without mutex protection. Initialize them before
locking the mutex.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c
index 97450a52172..8afe2dd1791 100644
--- a/drivers/base/dma-buf.c
+++ b/drivers/base/dma-buf.c
@@ -192,10 +192,11 @@ struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
         if (attach == NULL)
                 return ERR_PTR(-ENOMEM);
 
-        mutex_lock(&dmabuf->lock);
-
         attach->dev = dev;
         attach->dmabuf = dmabuf;
+
+        mutex_lock(&dmabuf->lock);
+
         if (dmabuf->ops->attach) {
                 ret = dmabuf->ops->attach(dmabuf, dev, attach);
                 if (ret)