diff options
| author | Alex Smith <alex.smith@imgtec.com> | 2015-07-24 18:24:23 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2015-08-18 18:58:49 +0200 |
| commit | d3273e10ad871e903456a875e1062514cd13a244 (patch) | |
| tree | 69f4276a6a873a400c9b94c9161cfa5c0dfde728 | |
| parent | dmaengine: jz4780: Fix error handling/signedness issues (diff) | |
| download | linux-d3273e10ad871e903456a875e1062514cd13a244.tar.xz linux-d3273e10ad871e903456a875e1062514cd13a244.zip | |
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>
| -rw-r--r-- | drivers/dma/dma-jz4780.c | 9 |
1 files 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) |