On 2020/06/11 20:18 Krzysztof Kozlowski <krzk@xxxxxxxxxx> wrote:
> 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 <krzk@xxxxxxxxxx>
Reviewed-by: Robin Gong <yibin.gong@xxxxxxx>
> ---
> 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
