[PATCH v4] spi: atmel: Fix PDC transfer setup bug

[Ville Baillie]

Commit 5fa5e6dec762 ("spi: atmel: Switch to transfer_one transfer
method") refactored the code and changed a conditional causing
atmel_spi_dma_map_xfer to never be called in PDC mode. This causes the
driver to silently fail.

This patch changes the conditional to match the behaviour of the
previous commit before the refactor.

Signed-off-by: Ville Baillie <villeb at bytesnap.co.uk>
---
 drivers/spi/spi-atmel.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 788dcdf25f00..f872cf196c2f 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -1301,7 +1301,7 @@ static int atmel_spi_one_transfer(struct spi_master *master,
 	 * DMA map early, for performance (empties dcache ASAP) and
 	 * better fault reporting.
 	 */
-	if ((!master->cur_msg_mapped)
+	if ((!master->cur_msg->is_dma_mapped)
 		&& as->use_pdc) {
 		if (atmel_spi_dma_map_xfer(as, xfer) < 0)
 			return -ENOMEM;
@@ -1381,7 +1381,7 @@ static int atmel_spi_one_transfer(struct spi_master *master,
 		}
 	}
 
-	if (!master->cur_msg_mapped
+	if (!master->cur_msg->is_dma_mapped
 		&& as->use_pdc)
 		atmel_spi_dma_unmap_xfer(master, xfer);
 
-- 
2.17.1