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 <[email protected]> --- 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 7067b6ddc1db..ca7cafc82f6b 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -751,6 +751,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, prev->lli.ctllo |= DWC_CTLL_INT_EN; prev->lli.llp = 0; + prev->lli.ctllo &= ~(DWC_CTLL_LLP_D_EN | DWC_CTLL_LLP_S_EN); first->txd.flags = flags; first->total_len = len; @@ -912,6 +913,7 @@ slave_sg_fromdev_fill_desc: prev->lli.ctllo |= DWC_CTLL_INT_EN; prev->lli.llp = 0; + prev->lli.ctllo &= ~(DWC_CTLL_LLP_D_EN | DWC_CTLL_LLP_S_EN); first->total_len = total_len; return &first->txd; -- 2.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
