2.6.24.4

 drivers

 dma

diff --git a/drivers/dma/ioat_dma.c b/drivers/dma/ioat_dma.c
index 45e7b46..8cf542b 100644
--- a/drivers/dma/ioat_dma.c
+++ b/drivers/dma/ioat_dma.c
@@ -726,6 +726,7 @@ static struct dma_async_tx_descriptor *ioat1_dma_prep_memcpy(
 
    if (new) {
       new->len = len;
+      new->async_tx.ack = 0;
       return &new->async_tx;
    } else
       return NULL;
@@ -749,6 +750,7 @@ static struct dma_async_tx_descriptor *ioat2_dma_prep_memcpy(
 
    if (new) {
       new->len = len;
+      new->async_tx.ack = 0;
       return &new->async_tx;
    } else
       return NULL;