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Subject[PATCH 6/8] dmaengine: mxs-dma: Let the core do the device node validation
Date
Let the DMA engine core do the device node validation instead of drivers.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
drivers/dma/mxs-dma.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 22cc7f6..8ce5e79 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -716,7 +716,6 @@ static int __init mxs_dma_init(struct mxs_dma_engine *mxs_dma)
}

struct mxs_dma_filter_param {
- struct device_node *of_node;
unsigned int chan_id;
};

@@ -727,9 +726,6 @@ static bool mxs_dma_filter_fn(struct dma_chan *chan, void *fn_param)
struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
int chan_irq;

- if (mxs_dma->dma_device.dev->of_node != param->of_node)
- return false;
-
if (chan->chan_id != param->chan_id)
return false;

@@ -752,13 +748,13 @@ static struct dma_chan *mxs_dma_xlate(struct of_phandle_args *dma_spec,
if (dma_spec->args_count != 1)
return NULL;

- param.of_node = ofdma->of_node;
param.chan_id = dma_spec->args[0];

if (param.chan_id >= mxs_dma->nr_channels)
return NULL;

- return dma_request_channel(mask, mxs_dma_filter_fn, &param);
+ return __dma_request_channel(&mask, mxs_dma_filter_fn, &param,
+ ofdma->of_node);
}

static int __init mxs_dma_probe(struct platform_device *pdev)
--
1.7.9.5
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