From 7abfe04c47d97243a7aeeb8fe211a15687bff67f Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Sat, 18 Feb 2017 10:42:02 +0100 Subject: [PATCH] spi: spi-ti-qspi: Fix error handling '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 Signed-off-by: Mark Brown --- 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 e784d0f64dc1..ad76a44fee6f 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -718,9 +718,10 @@ 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; } -- 2.30.2