[PATCH 1/2] dmaengine: fsl-edma: Add lockdep assert for exported function
From: Krzysztof Kozlowski <krzk@kernel.org>
Date: 2020-06-11 12:17:51
Also in:
lkml
Subsystem:
dma generic offload engine subsystem, freescale edma driver, the rest · Maintainers:
Vinod Koul, Frank Li, Linus Torvalds
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@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