[PATCH for v4.9 LTS 61/86] spi: davinci: use dma_mapping_error()

[Levin, Alexander (Sasha Levin)]

From: Kevin Hilman <khil...@baylibre.com>

[ Upstream commit c5a2a394835f473ae23931eda5066d3771d7b2f8 ]

The correct error checking for dma_map_single() is to use
dma_mapping_error().

Signed-off-by: Kevin Hilman <khil...@baylibre.com>
Signed-off-by: Mark Brown <broo...@kernel.org>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
---
 drivers/spi/spi-davinci.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c
index d36c11b73a35..02fb96797ac8 100644
--- a/drivers/spi/spi-davinci.c
+++ b/drivers/spi/spi-davinci.c
@@ -646,7 +646,7 @@ static int davinci_spi_bufs(struct spi_device *spi, struct 
spi_transfer *t)
                        buf = t->rx_buf;
                t->rx_dma = dma_map_single(&spi->dev, buf,
                                t->len, DMA_FROM_DEVICE);
-               if (!t->rx_dma) {
+               if (dma_mapping_error(&spi->dev, !t->rx_dma)) {
                        ret = -EFAULT;
                        goto err_rx_map;
                }
@@ -660,7 +660,7 @@ static int davinci_spi_bufs(struct spi_device *spi, struct 
spi_transfer *t)
                        buf = (void *)t->tx_buf;
                t->tx_dma = dma_map_single(&spi->dev, buf,
                                t->len, DMA_TO_DEVICE);
-               if (!t->tx_dma) {
+               if (dma_mapping_error(&spi->dev, t->tx_dma)) {
                        ret = -EFAULT;
                        goto err_tx_map;
                }
-- 
2.11.0