[v2,5/8] dmaengine: mmp_tdma: Let the core do the device node validation
diff mbox series

Message ID 5600ce71701aac33035d78bf038d97ca331bf18b.1558351667.git.baolin.wang@linaro.org
State New
Headers show
Series
  • Add matching device node validation in DMA engine core
Related show

Commit Message

Baolin Wang May 20, 2019, 11:32 a.m. UTC
Let the DMA engine core do the device node validation instead of drivers.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
 drivers/dma/mmp_tdma.c |   10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

Patch
diff mbox series

diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
index 0c56faa0..e76858b 100644
--- a/drivers/dma/mmp_tdma.c
+++ b/drivers/dma/mmp_tdma.c
@@ -586,18 +586,12 @@  static int mmp_tdma_chan_init(struct mmp_tdma_device *tdev,
 }
 
 struct mmp_tdma_filter_param {
-	struct device_node *of_node;
 	unsigned int chan_id;
 };
 
 static bool mmp_tdma_filter_fn(struct dma_chan *chan, void *fn_param)
 {
 	struct mmp_tdma_filter_param *param = fn_param;
-	struct mmp_tdma_chan *tdmac = to_mmp_tdma_chan(chan);
-	struct dma_device *pdma_device = tdmac->chan.device;
-
-	if (pdma_device->dev->of_node != param->of_node)
-		return false;
 
 	if (chan->chan_id != param->chan_id)
 		return false;
@@ -615,13 +609,13 @@  static struct dma_chan *mmp_tdma_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 >= TDMA_CHANNEL_NUM)
 		return NULL;
 
-	return dma_request_channel(mask, mmp_tdma_filter_fn, &param);
+	return __dma_request_channel(&mask, mmp_tdma_filter_fn, &param,
+				     ofdma->of_node);
 }
 
 static const struct of_device_id mmp_tdma_dt_ids[] = {