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>

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,