[ Upstream commit 89d03b3c126d683f7b2cd5b07178493993d12448 ]
The maximum value of block length is 0xffff, so if the configured transfer
length
is more than 0xffff, that will cause block length overflow to lead a
configuration
error.
Thus we can set block length as the maximum burst length to avoid this issue,
since
the maximum burst length will not be a big value which is more than 0xffff.
Signed-off-by: Eric Long <eric.l...@unisoc.com>
Signed-off-by: Baolin Wang <baolin.w...@linaro.org>
Signed-off-by: Vinod Koul <vk...@kernel.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/dma/sprd-dma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index 0f92e60529d1..a01c23246632 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -778,7 +778,7 @@ static int sprd_dma_fill_desc(struct dma_chan *chan,
temp |= slave_cfg->src_maxburst & SPRD_DMA_FRG_LEN_MASK;
hw->frg_len = temp;
- hw->blk_len = len & SPRD_DMA_BLK_LEN_MASK;
+ hw->blk_len = slave_cfg->src_maxburst & SPRD_DMA_BLK_LEN_MASK;
hw->trsc_len = len & SPRD_DMA_TRSC_LEN_MASK;
temp = (dst_step & SPRD_DMA_TRSF_STEP_MASK) <<
SPRD_DMA_DEST_TRSF_STEP_OFFSET;
--
2.20.1
