Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[karo-tx-linux.git] / drivers / dma / pch_dma.c

diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c
index 92b679024fedd9e033e9cbae311f7f8d7f221142..c064c89420d06080a737ea48356501aeeae869cd 100644 (file)
--- a/drivers/dma/pch_dma.c
+++ b/drivers/dma/pch_dma.c
@@ -259,11 +259,6 @@ static void pdc_dostart(struct pch_dma_chan *pd_chan, struct pch_dma_desc* desc)
                return;
        }
 
-       channel_writel(pd_chan, DEV_ADDR, desc->regs.dev_addr);
-       channel_writel(pd_chan, MEM_ADDR, desc->regs.mem_addr);
-       channel_writel(pd_chan, SIZE, desc->regs.size);
-       channel_writel(pd_chan, NEXT, desc->regs.next);
-
        dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> dev_addr: %x\n",
                pd_chan->chan.chan_id, desc->regs.dev_addr);
        dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> mem_addr: %x\n",
@@ -273,10 +268,16 @@ static void pdc_dostart(struct pch_dma_chan *pd_chan, struct pch_dma_desc* desc)
        dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> next: %x\n",
                pd_chan->chan.chan_id, desc->regs.next);
 
-       if (list_empty(&desc->tx_list))
+       if (list_empty(&desc->tx_list)) {
+               channel_writel(pd_chan, DEV_ADDR, desc->regs.dev_addr);
+               channel_writel(pd_chan, MEM_ADDR, desc->regs.mem_addr);
+               channel_writel(pd_chan, SIZE, desc->regs.size);
+               channel_writel(pd_chan, NEXT, desc->regs.next);
                pdc_set_mode(&pd_chan->chan, DMA_CTL0_ONESHOT);
-       else
+       } else {
+               channel_writel(pd_chan, NEXT, desc->txd.phys);
                pdc_set_mode(&pd_chan->chan, DMA_CTL0_SG);
+       }
 
        val = dma_readl(pd, CTL2);
        val |= 1 << (DMA_CTL2_START_SHIFT_BITS + pd_chan->chan.chan_id);