1 files changed, 11 insertions, 7 deletions

diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index b459a9034aac..79182dcb91b7 100644
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -44,20 +44,23 @@ do_async_xor(struct dma_chan *chan, struct page *dest, struct page **src_list,
         void *cb_param_orig = submit->cb_param;
         enum async_tx_flags flags_orig = submit->flags;
         enum dma_ctrl_flags dma_flags;
-        int xor_src_cnt;
+        int xor_src_cnt = 0;
         dma_addr_t dma_dest;
 
         /* map the dest bidrectional in case it is re-used as a source */
         dma_dest = dma_map_page(dma->dev, dest, offset, len, DMA_BIDIRECTIONAL);
         for (i = 0; i < src_cnt; i++) {
                 /* only map the dest once */
+                if (!src_list[i])
+                        continue;
                 if (unlikely(src_list[i] == dest)) {
-                        dma_src[i] = dma_dest;
+                        dma_src[xor_src_cnt++] = dma_dest;
                         continue;
                 }
-                dma_src[i] = dma_map_page(dma->dev, src_list[i], offset,
-                                          len, DMA_TO_DEVICE);
+                dma_src[xor_src_cnt++] = dma_map_page(dma->dev, src_list[i], offset,
+                                                      len, DMA_TO_DEVICE);
         }
+        src_cnt = xor_src_cnt;
 
         while (src_cnt) {
                 submit->flags = flags_orig;
@@ -123,7 +126,7 @@ do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
             int src_cnt, size_t len, struct async_submit_ctl *submit)
 {
         int i;
-        int xor_src_cnt;
+        int xor_src_cnt = 0;
         int src_off = 0;
         void *dest_buf;
         void **srcs;
@@ -135,8 +138,9 @@ do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
 
         /* convert to buffer pointers */
         for (i = 0; i < src_cnt; i++)
-                srcs[i] = page_address(src_list[i]) + offset;
-
+                if (src_list[i])
+                        srcs[xor_src_cnt++] = page_address(src_list[i]) + offset;
+        src_cnt = xor_src_cnt;
         /* set destination address */
         dest_buf = page_address(dest) + offset;