dmaengine: mxs-dma: Let the core do the device node validation

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

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 22cc7f6..8ce5e79 100644 (file)
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -716,7 +716,6 @@ err_out:
 }
 
 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)