diff options
| author | Daniel Silsby <dansilsby@gmail.com> | 2018-08-30 00:32:54 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2018-09-11 10:29:26 +0300 |
| commit | f3c045dffe738fb2de534a8156f540dff42c315e (patch) | |
| tree | 13e096af6c20fdccbe39ae0070f6108bd41778ad /drivers/dma/dma-jz4780.c | |
| parent | 5a6187d70f7fc0b55db49af4b2a0f35f34efd770 (diff) | |
| download | linux-f3c045dffe738fb2de534a8156f540dff42c315e.tar.xz | |
dmaengine: dma-jz4780: Simplify jz4780_dma_desc_residue()
Simple cleanup, no changes to actual logic here.
Signed-off-by: Daniel Silsby <dansilsby@gmail.com>
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Tested-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/dma-jz4780.c')
| -rw-r--r-- | drivers/dma/dma-jz4780.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c index bd3cecb800c5..d055602a92ca 100644 --- a/drivers/dma/dma-jz4780.c +++ b/drivers/dma/dma-jz4780.c @@ -610,22 +610,17 @@ static size_t jz4780_dma_desc_residue(struct jz4780_dma_chan *jzchan, struct jz4780_dma_desc *desc, unsigned int next_sg) { struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan); - unsigned int residue, count; + unsigned int count = 0; unsigned int i; - residue = 0; - for (i = next_sg; i < desc->count; i++) - residue += (desc->desc[i].dtc & GENMASK(23, 0)) << - jzchan->transfer_shift; + count += desc->desc[i].dtc & GENMASK(23, 0); - if (next_sg != 0) { - count = jz4780_dma_chn_readl(jzdma, jzchan->id, + if (next_sg != 0) + count += jz4780_dma_chn_readl(jzdma, jzchan->id, JZ_DMA_REG_DTC); - residue += count << jzchan->transfer_shift; - } - return residue; + return count << jzchan->transfer_shift; } static enum dma_status jz4780_dma_tx_status(struct dma_chan *chan, |