carma-fpga: pass correct flags to ->device_prep_dma_memcpy()

DMA unmapping is handled by a driver so tell fsldma.c driver
(which is the DMA engine driver used by carma-fpga) to skip
unmapping destination and source buffers.

Cc: Ira W. Snyder <iws@ovro.caltech.edu>
Cc: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Dan Williams <djbw@fb.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/misc/carma/carma-fpga.c b/drivers/misc/carma/carma-fpga.c
index 8835eabb3b87..6b43f8c7b3be 100644
--- a/drivers/misc/carma/carma-fpga.c
+++ b/drivers/misc/carma/carma-fpga.c
@@ -631,6 +631,8 @@ static int data_submit_dma(struct fpga_device *priv, struct data_buf *buf)
         struct dma_async_tx_descriptor *tx;
         dma_cookie_t cookie;
         dma_addr_t dst, src;
+        unsigned long dma_flags = DMA_COMPL_SKIP_DEST_UNMAP |
+                                  DMA_COMPL_SKIP_SRC_UNMAP;
 
         dst_sg = buf->vb.sglist;
         dst_nents = buf->vb.sglen;
@@ -666,7 +668,7 @@ static int data_submit_dma(struct fpga_device *priv, struct data_buf *buf)
         src = SYS_FPGA_BLOCK;
         tx = chan->device->device_prep_dma_memcpy(chan, dst, src,
                                                   REG_BLOCK_SIZE,
-                                                  0);
+                                                  dma_flags);
         if (!tx) {
                 dev_err(priv->dev, "unable to prep SYS-FPGA DMA\n");
                 return -ENOMEM;