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 <i...@ovro.caltech.edu>
Cc: Tomasz Figa <t.f...@samsung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnier...@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.p...@samsung.com>
---
drivers/misc/carma/carma-fpga.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/carma/carma-fpga.c b/drivers/misc/carma/carma-fpga.c
index 8835eab..6b43f8c 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;
--
1.8.0
--
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