Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
  async_xor: dma_map destination DMA_BIDIRECTIONAL
  dmaengine: protect 'id' from concurrent registrations
  ioat: wait for self-test completion

1 files changed, 13 insertions, 3 deletions

diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index c7a9306d951d..6be317262200 100644
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -85,18 +85,28 @@ iop_adma_run_tx_complete_actions(struct iop_adma_desc_slot *desc,
                         enum dma_ctrl_flags flags = desc->async_tx.flags;
                         u32 src_cnt;
                         dma_addr_t addr;
+                        dma_addr_t dest;
 
+                        src_cnt = unmap->unmap_src_cnt;
+                        dest = iop_desc_get_dest_addr(unmap, iop_chan);
                         if (!(flags & DMA_COMPL_SKIP_DEST_UNMAP)) {
-                                addr = iop_desc_get_dest_addr(unmap, iop_chan);
-                                dma_unmap_page(dev, addr, len, DMA_FROM_DEVICE);
+                                enum dma_data_direction dir;
+
+                                if (src_cnt > 1) /* is xor? */
+                                        dir = DMA_BIDIRECTIONAL;
+                                else
+                                        dir = DMA_FROM_DEVICE;
+
+                                dma_unmap_page(dev, dest, len, dir);
                         }
 
                         if (!(flags & DMA_COMPL_SKIP_SRC_UNMAP)) {
-                                src_cnt = unmap->unmap_src_cnt;
                                 while (src_cnt--) {
                                         addr = iop_desc_get_src_addr(unmap,
                                                                      iop_chan,
                                                                      src_cnt);
+                                        if (addr == dest)
+                                                continue;
                                         dma_unmap_page(dev, addr, len,
                                                        DMA_TO_DEVICE);
                                 }