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spi: xilinx: Handle errors from platform_get_irq()

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The Xilinx SPI driver can operate without an IRQ, but not every error
returned by platform_get_irq() means that no IRQ was specified. It will
also return an error if the IRQ specification is invalid or the IRQ
provider is not yet available (EPROBE_DEFER).

So instead of ignoring all errors only ignore ENXIO, which means no IRQ was
specified, and propagate all other errors to device driver core.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2016-07-15 11:04:18 +02:00 committed by Mark Brown
parent 1a695a905c
commit 4db9bf548b
1 changed files with 4 additions and 1 deletions
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5
drivers/spi/spi-xilinx.c
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@ -455,7 +455,10 @@ static int xilinx_spi_probe(struct platform_device *pdev)
xspi->buffer_size = xilinx_spi_find_buffer_size(xspi);
xspi->irq = platform_get_irq(pdev, 0);
if (xspi->irq >= 0) {
if (xspi->irq < 0 && xspi->irq != -ENXIO) {
ret = xspi->irq;
goto put_master;
} else if (xspi->irq >= 0) {
/* Register for SPI Interrupt */
ret = devm_request_irq(&pdev->dev, xspi->irq, xilinx_spi_irq, 0,
dev_name(&pdev->dev), xspi);