From d3273e10ad871e903456a875e1062514cd13a244 Mon Sep 17 00:00:00 2001 From: Alex Smith Date: Fri, 24 Jul 2015 17:24:23 +0100 Subject: [PATCH] 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 Cc: Vinod Koul Cc: Zubair Lutfullah Kakakhel Cc: dmaengine@vger.kernel.org Signed-off-by: Vinod Koul --- 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 e4a291c67e2a..40baaf00b971 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) -- 2.34.1