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| author | Eric Long <eric.long@unisoc.com> | 2019-05-06 10:28:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-25 06:34:48 +0300 |
| commit | 544671fac56e69b646664311c9790b89dfb3d328 (patch) | |
| tree | 03687ee8197b115642e42a7c143da9d82f048e39 /drivers/dma | |
| parent | 3ef397924060d1431a1a2e4aa09964276da97d92 (diff) | |
| download | linux-544671fac56e69b646664311c9790b89dfb3d328.tar.xz | |
dmaengine: sprd: Fix block length overflow
[ 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>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/sprd-dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
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; |