1 files changed, 8 insertions, 3 deletions

diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 56b5f98da463..db279872ef3d 100644
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -69,6 +69,7 @@ do_async_xor(struct dma_chan *chan, struct page *dest, struct page **src_list,
                  */
                 if (src_cnt > xor_src_cnt) {
                         submit->flags &= ~ASYNC_TX_ACK;
+                        submit->flags |= ASYNC_TX_FENCE;
                         dma_flags = DMA_COMPL_SKIP_DEST_UNMAP;
                         submit->cb_fn = NULL;
                         submit->cb_param = NULL;
@@ -78,7 +79,8 @@ do_async_xor(struct dma_chan *chan, struct page *dest, struct page **src_list,
                 }
                 if (submit->cb_fn)
                         dma_flags |= DMA_PREP_INTERRUPT;
-
+                if (submit->flags & ASYNC_TX_FENCE)
+                        dma_flags |= DMA_PREP_FENCE;
                 /* Since we have clobbered the src_list we are committed
                  * to doing this asynchronously.  Drivers force forward progress
                  * in case they can not provide a descriptor
@@ -264,12 +266,15 @@ async_xor_val(struct page *dest, struct page **src_list, unsigned int offset,
                 dma_src = (dma_addr_t *) src_list;
 
         if (dma_src && device && src_cnt <= device->max_xor) {
-                unsigned long dma_prep_flags;
+                unsigned long dma_prep_flags = 0;
                 int i;
 
                 pr_debug("%s: (async) len: %zu\n", __func__, len);
 
-                dma_prep_flags = submit->cb_fn ? DMA_PREP_INTERRUPT : 0;
+                if (submit->cb_fn)
+                        dma_prep_flags |= DMA_PREP_INTERRUPT;
+                if (submit->flags & ASYNC_TX_FENCE)
+                        dma_prep_flags |= DMA_PREP_FENCE;
                 for (i = 0; i < src_cnt; i++)
                         dma_src[i] = dma_map_page(device->dev, src_list[i],
                                                   offset, len, DMA_TO_DEVICE);