[PATCH 4/8] dmaengine: dma-jz4780: Let the core do the device node validation

[Baolin Wang]

Let the DMA engine core do the device node validation instead of drivers.

Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxx>
---
 drivers/dma/dma-jz4780.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index 9ce0a38..7e1d381 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -160,7 +160,6 @@ struct jz4780_dma_dev {
 };
 
 struct jz4780_dma_filter_data {
-	struct device_node *of_node;
 	uint32_t transfer_type;
 	int channel;
 };
@@ -765,8 +764,6 @@ static bool jz4780_dma_filter_fn(struct dma_chan *chan, void *param)
 	struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan);
 	struct jz4780_dma_filter_data *data = param;
 
-	if (jzdma->dma_device.dev->of_node != data->of_node)
-		return false;
 
 	if (data->channel > -1) {
 		if (data->channel != jzchan->id)
@@ -790,7 +787,6 @@ static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec,
 	if (dma_spec->args_count != 2)
 		return NULL;
 
-	data.of_node = ofdma->of_node;
 	data.transfer_type = dma_spec->args[0];
 	data.channel = dma_spec->args[1];
 
@@ -815,7 +811,8 @@ static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec,
 		return dma_get_slave_channel(
 			&jzdma->chan[data.channel].vchan.chan);
 	} else {
-		return dma_request_channel(mask, jz4780_dma_filter_fn, &data);
+		return __dma_request_channel(&mask, jz4780_dma_filter_fn, &data,
+					     ofdma->of_node);
 	}
 }
 
-- 
1.7.9.5