[PATCH 1/2] dmaengine: fsl-edma: Add lockdep assert for exported function

[Krzysztof Kozlowski]

Add lockdep assert for an exported function expected to be called under
spin lock.  Since this function is called in different modules, the
lockdep assert will be self-documenting note about need for locking.

Signed-off-by: Krzysztof Kozlowski <k...@kernel.org>
---
 drivers/dma/fsl-edma-common.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index 5697c3622699..4550818cca4a 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -589,6 +589,8 @@ void fsl_edma_xfer_desc(struct fsl_edma_chan *fsl_chan)
 {
        struct virt_dma_desc *vdesc;
 
+       lockdep_assert_held(&fsl_chan->vchan.lock);
+
        vdesc = vchan_next_desc(&fsl_chan->vchan);
        if (!vdesc)
                return;
-- 
2.7.4