diff --git a/[refs] b/[refs]
index 7e3aa6f3cdfa..3a678503995f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a309218acee8606f7e235da20cc826eb06d9b0f6
+refs/heads/master: 4b652f0db3be891c7b76b109c3b55003b920fc96
diff --git a/trunk/drivers/dma/iovlock.c b/trunk/drivers/dma/iovlock.c
index 9f6fe46a9b87..c0a272c73682 100644
--- a/trunk/drivers/dma/iovlock.c
+++ b/trunk/drivers/dma/iovlock.c
@@ -183,6 +183,11 @@ dma_cookie_t dma_memcpy_to_iovec(struct dma_chan *chan, struct iovec *iov,
 					iov_byte_offset,
 					kdata,
 					copy);
+			/* poll for a descriptor slot */
+			if (unlikely(dma_cookie < 0)) {
+				dma_async_issue_pending(chan);
+				continue;
+			}
 
 			len -= copy;
 			iov[iovec_idx].iov_len -= copy;
@@ -248,6 +253,11 @@ dma_cookie_t dma_memcpy_pg_to_iovec(struct dma_chan *chan, struct iovec *iov,
 					page,
 					offset,
 					copy);
+			/* poll for a descriptor slot */
+			if (unlikely(dma_cookie < 0)) {
+				dma_async_issue_pending(chan);
+				continue;
+			}
 
 			len -= copy;
 			iov[iovec_idx].iov_len -= copy;