| Message ID | 1453663322-14474-3-git-send-email-mans@mansr.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index cc7c1acc8188..03ec88f1c161 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -764,6 +764,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, lli_set(prev, ctllo, DWC_CTLL_INT_EN); prev->lli.llp = 0; + lli_clear(prev, ctllo, DWC_CTLL_LLP_D_EN | DWC_CTLL_LLP_S_EN); first->txd.flags = flags; first->total_len = len; @@ -923,6 +924,7 @@ slave_sg_fromdev_fill_desc: lli_set(prev, ctllo, DWC_CTLL_INT_EN); prev->lli.llp = 0; + lli_clear(prev, ctllo, DWC_CTLL_LLP_D_EN | DWC_CTLL_LLP_S_EN); first->total_len = total_len; return &first->txd;
The datasheet requires that the LLP_[SD]_EN bits be cleared whenever LLP.LOC is zero, i.e. in the last descriptor of a multi-block chain. Make the driver do this. Signed-off-by: Mans Rullgard <mans@mansr.com> --- drivers/dma/dw/core.c | 2 ++ 1 file changed, 2 insertions(+)