When the DT requests a specific channel to use it is not necesssary
to scan through all DMA channels in the system. Just return the
requested channel using dma_get_slave_channel().
Signed-off-by: Alex Smith <alex.smith@xxxxxxxxxx>
Cc: Vinod Koul <vinod.koul@xxxxxxxxx>
Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@xxxxxxxxxx>
Cc: dmaengine@xxxxxxxxxxxxxxx
---
Changes in v3:
- None
Changes in v2:
- None
---
drivers/dma/dma-jz4780.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index 90b66186e8bc..05f2d468f396 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -726,9 +726,14 @@ static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec,
data.channel);
return NULL;
}
- }
- return dma_request_channel(mask, jz4780_dma_filter_fn, &data);
+ jzdma->chan[data.channel].transfer_type = data.transfer_type;
+
+ return dma_get_slave_channel(
+ &jzdma->chan[data.channel].vchan.chan);
+ } else {
+ return dma_request_channel(mask, jz4780_dma_filter_fn, &data);
+ }
}
static int jz4780_dma_probe(struct platform_device *pdev)
--
2.4.6
--
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