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dmaengine: dma-jz4780: Simplify jz4780_dma_desc_residue()

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Simple cleanup, no changes to actual logic here.

Signed-off-by: Daniel Silsby <[email protected]>
Signed-off-by: Paul Cercueil <[email protected]>
Tested-by: Mathieu Malaterre <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This commit is contained in:
Daniel Silsby
2018-09-11 12:59:26 +05:30
committed by Vinod Koul
parent 5a6187d70f
commit f3c045dffe
1 changed files with 5 additions and 10 deletions
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drivers/dma/dma-jz4780.c
+5 -10
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@@ -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,