dmaengine: jz4780: Use dma_get_slave_channel when requesting a specific channel
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@imgtec.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Cc: dmaengine@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index e4a291c..40baaf0 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -726,9 +726,14 @@
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)