lkml.org 
[lkml]   [2018]   [Jul]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 12/18] 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>
Tested-by: Mathieu Malaterre <malat@debian.org>
---
drivers/dma/dma-jz4780.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)

v2: No change

v3: No change

diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index fa926de082ba..cc2a86844db4 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -608,22 +608,17 @@ 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,
--
2.11.0
\
 
 \ /
  Last update: 2018-07-21 13:09    [W:0.136 / U:0.384 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site