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spi: spi-ti-qspi: Fix error handling

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'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.jaillet@wanadoo.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Christophe JAILLET 2017-02-18 10:42:02 +01:00 committed by Mark Brown
parent 582c97f686
commit 30fb27239f
1 changed files with 2 additions and 1 deletions
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3
drivers/spi/spi-ti-qspi.c
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@ -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;
}