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| author | Eric Long <eric.long@spreadtrum.com> | 2018-11-06 13:01:33 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2018-12-05 14:27:11 +0530 |
| commit | 13e8997924a0df7f0136d742aa829b791889d3ce (patch) | |
| tree | bce9d4a8157e6b529c5859fff7c97b5883d9ddf8 | |
| parent | d762ab33ccd03e8c1ad50b814d2deccec15b8c28 (diff) | |
dmaengine: sprd: Fix the last link-list configuration
We will pass sglen as 0 configure the last link-list configuration
when filling the descriptor, which will cause the incorrect link-list
configuration. Thus we should check if the sglen is 0 to configure
the correct link-list configuration.
Signed-off-by: Eric Long <eric.long@spreadtrum.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/dma/sprd-dma.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index 4f3587b826da..e6a74dc7da95 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -697,7 +697,8 @@ static int sprd_dma_fill_desc(struct dma_chan *chan, hw->cfg |= SPRD_DMA_LINKLIST_EN; /* link-list index */ - temp = (sg_index + 1) % sglen; + temp = sglen ? (sg_index + 1) % sglen : 0; + /* Next link-list configuration's physical address offset */ temp = temp * sizeof(*hw) + SPRD_DMA_CHN_SRC_ADDR; /* |