[PATCH] dmaengine: sh: fix some NULL dereferences

[Dan Carpenter]

The dma_free_coherent() function needs a valid device pointer or it will
crash.

Fixes: 550c591a89a1 ("dmaengine: sh: Add DMAC driver for RZ/G2L SoC")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
This means that remove() has not been tested.

 drivers/dma/sh/rz-dmac.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c
index 11986a8d22fc..7c1db6a5b365 100644
--- a/drivers/dma/sh/rz-dmac.c
+++ b/drivers/dma/sh/rz-dmac.c
@@ -921,7 +921,7 @@ static int rz_dmac_probe(struct platform_device *pdev)
 	for (i = 0; i < channel_num; i++) {
 		struct rz_dmac_chan *channel = &dmac->channels[i];
 
-		dma_free_coherent(NULL,
+		dma_free_coherent(&pdev->dev,
 				  sizeof(struct rz_lmdesc) * DMAC_NR_LMDESC,
 				  channel->lmdesc.base,
 				  channel->lmdesc.base_dma);
@@ -938,7 +938,7 @@ static int rz_dmac_remove(struct platform_device *pdev)
 	for (i = 0; i < dmac->n_channels; i++) {
 		struct rz_dmac_chan *channel = &dmac->channels[i];
 
-		dma_free_coherent(NULL,
+		dma_free_coherent(&pdev->dev,
 				  sizeof(struct rz_lmdesc) * DMAC_NR_LMDESC,
 				  channel->lmdesc.base,
 				  channel->lmdesc.base_dma);
-- 
2.20.1