spi: davinci: use dma_mapping_error()

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

Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c
index d36c11b73a35ca656ab04e9c5ef0492f96950b32..02fb96797ac8b9ec52f41c8a13f93b290db0fc1c 100644 (file)
--- 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;
                }