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Subject[PATCH 09/14] dmaengine: dma-jz4780: Simplify jz4780_dma_desc_residue()
Date
From: Daniel Silsby <dansilsby@gmail.com>

Simple cleanup, no changes to actual logic here.

Signed-off-by: Daniel Silsby <dansilsby@gmail.com>
---
drivers/dma/dma-jz4780.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index 7b2e305e28fb..adada2a3a067 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -604,22 +604,17 @@ 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 & 0xffffff) <<
- jzchan->transfer_shift;
+ count += desc->desc[i].dtc & 0xffffff;

- 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,
--
2.18.0
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