dmaengine: fix xor sources continuation

the partial xor result must be kept until the next
tx is generated.

Cc: <stable@vger.kernel.org>
Signed-off-by: Xuelin Shi <xuelin.shi@freescale.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 3c562f5a60bb..e1bce26cd4f9 100644
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -78,8 +78,6 @@ do_async_xor(struct dma_chan *chan, struct dmaengine_unmap_data *unmap,
                 tx = dma->device_prep_dma_xor(chan, dma_dest, src_list,
                                               xor_src_cnt, unmap->len,
                                               dma_flags);
-                src_list[0] = tmp;
-
 
                 if (unlikely(!tx))
                         async_tx_quiesce(&submit->depend_tx);
@@ -92,6 +90,7 @@ do_async_xor(struct dma_chan *chan, struct dmaengine_unmap_data *unmap,
                                                       xor_src_cnt, unmap->len,
                                                       dma_flags);
                 }
+                src_list[0] = tmp;
 
                 dma_set_unmap(tx, unmap);
                 async_tx_submit(chan, tx, submit);