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authorDaniel Silsby <dansilsby@gmail.com>2018-08-30 00:32:54 +0300
committerVinod Koul <vkoul@kernel.org>2018-09-11 10:29:26 +0300
commitf3c045dffe738fb2de534a8156f540dff42c315e (patch)
tree13e096af6c20fdccbe39ae0070f6108bd41778ad /drivers/dma/dma-jz4780.c
parent5a6187d70f7fc0b55db49af4b2a0f35f34efd770 (diff)
downloadlinux-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.c15
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,