4 files changed, 13 insertions, 7 deletions

diff --git a/crypto/async_tx/async_memcpy.c b/crypto/async_tx/async_memcpy.c
index 361b5e8239bc..9e62feffb374 100644
--- a/crypto/async_tx/async_memcpy.c
+++ b/crypto/async_tx/async_memcpy.c
@@ -67,6 +67,12 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
 
 		tx = device->device_prep_dma_memcpy(chan, dma_dest, dma_src,
 						    len, dma_prep_flags);
+		if (!tx) {
+			dma_unmap_page(device->dev, dma_dest, len,
+				       DMA_FROM_DEVICE);
+			dma_unmap_page(device->dev, dma_src, len,
+				       DMA_TO_DEVICE);
+		}
 	}
 
 	if (tx) {
diff --git a/crypto/async_tx/async_memset.c b/crypto/async_tx/async_memset.c
index 58e4a8752aee..05a4d1e00148 100644
--- a/crypto/async_tx/async_memset.c
+++ b/crypto/async_tx/async_memset.c
@@ -25,6 +25,7 @@
  */
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
+#include <linux/module.h>
 #include <linux/mm.h>
 #include <linux/dma-mapping.h>
 #include <linux/async_tx.h>
diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c
index 842120979374..7be34248b450 100644
--- a/crypto/async_tx/async_tx.c
+++ b/crypto/async_tx/async_tx.c
@@ -128,8 +128,8 @@ async_tx_channel_switch(struct dma_async_tx_descriptor *depend_tx,
 		}
 		device->device_issue_pending(chan);
 	} else {
-		if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR)
-			panic("%s: DMA_ERROR waiting for depend_tx\n",
+		if (dma_wait_for_async_tx(depend_tx) != DMA_SUCCESS)
+			panic("%s: DMA error waiting for depend_tx\n",
 			      __func__);
 		tx->tx_submit(tx);
 	}
@@ -280,8 +280,9 @@ void async_tx_quiesce(struct dma_async_tx_descriptor **tx)
 		 * we are referring to the correct operation
 		 */
 		BUG_ON(async_tx_test_ack(*tx));
-		if (dma_wait_for_async_tx(*tx) == DMA_ERROR)
-			panic("DMA_ERROR waiting for transaction\n");
+		if (dma_wait_for_async_tx(*tx) != DMA_SUCCESS)
+			panic("%s: DMA error waiting for transaction\n",
+			      __func__);
 		async_tx_ack(*tx);
 		*tx = NULL;
 	}
diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 154cc84381c2..8ade0a0481c6 100644
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -230,9 +230,7 @@ EXPORT_SYMBOL_GPL(async_xor);
 
 static int page_is_zero(struct page *p, unsigned int offset, size_t len)
 {
-	char *a = page_address(p) + offset;
-	return ((*(u32 *) a) == 0 &&
-		memcmp(a, a + 4, len - 4) == 0);
+	return !memchr_inv(page_address(p) + offset, 0, len);
 }
 
 static inline struct dma_chan *