spi: davinci: fix up dma_mapping_error() incorrect patch

commit aabb797b4c1204b2e8518538b2616e476f2bac92, which is commit
c5a2a394835f473ae23931eda5066d3771d7b2f8 upstream had an error in it.

Ben writes:
	The '!' needs to be deleted.  This appears to have been fixed upstream
	by:

	commit 8aedbf580d21121d2a032e4c8ea12d8d2d85e275
	Author: Fabien Parent <fparent@baylibre.com>
	Date:   Thu Feb 23 19:01:56 2017 +0100

	    spi: davinci: Use SPI framework to handle DMA mapping

	which is not suitable for stable.

So I'm just fixing this up directly.

Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c
index 02fb967..0d8f43a 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 (dma_mapping_error(&spi->dev, !t->rx_dma)) {
+               if (dma_mapping_error(&spi->dev, t->rx_dma)) {
                        ret = -EFAULT;
                        goto err_rx_map;
                }