From: Eric Long eric.long@unisoc.com
[ 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.long@unisoc.com Signed-off-by: Baolin Wang baolin.wang@linaro.org Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@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;