| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.1 038/121] dmaengine: sprd: Fix the incorrect start for 2-stage destination channels | Date | Mon, 24 Jun 2019 17:56:10 +0800 |
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[ Upstream commit 3d626a97f0303e9c30d063434b749de3f0f91fb5 ]
The 2-stage destination channel will be triggered by source channel automatically, which means we should not trigger it by software request.
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 | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index 431e289d59a5..0f92e60529d1 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -510,7 +510,9 @@ static void sprd_dma_start(struct sprd_dma_chn *schan) sprd_dma_set_uid(schan); sprd_dma_enable_chn(schan); - if (schan->dev_id == SPRD_DMA_SOFTWARE_UID) + if (schan->dev_id == SPRD_DMA_SOFTWARE_UID && + schan->chn_mode != SPRD_DMA_DST_CHN0 && + schan->chn_mode != SPRD_DMA_DST_CHN1) sprd_dma_soft_request(schan); } -- 2.20.1
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