[PATCH] spi: spi-ti-qspi: Fix error handling

[Christophe JAILLET]

'dma_request_chan_by_mask()' can not return NULL.
Try to keep the logic in 'no_dma:' by resetting 'qspi->rx_chan' in case
of error.

Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
---
 drivers/spi/spi-ti-qspi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c
index ec6fb09e2e17..0fefa6423ff4 100644
--- a/drivers/spi/spi-ti-qspi.c
+++ b/drivers/spi/spi-ti-qspi.c
@@ -714,9 +714,10 @@ static int ti_qspi_probe(struct platform_device *pdev)
        dma_cap_set(DMA_MEMCPY, mask);
 
        qspi->rx_chan = dma_request_chan_by_mask(&mask);
-       if (!qspi->rx_chan) {
+       if (IS_ERR(qspi->rx_chan)) {
                dev_err(qspi->dev,
                        "No Rx DMA available, trying mmap mode\n");
+               qspi->rx_chan = NULL;
                ret = 0;
                goto no_dma;
        }
-- 
2.9.3