From: Mans Rullgard <mans@xxxxxxxxx> 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@xxxxxxxxx> Acked-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> --- drivers/dma/dw/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index cd7616e..4a823f4 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -763,6 +763,7 @@ 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; @@ -922,6 +923,7 @@ 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; -- 2.7.0 -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
