[PATCH 1/2] spi: xilinx: Handle errors from platform_get_irq()

[Lars-Peter Clausen <lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org>]

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-Qo5EllUWu/uELgA04lAiVw@public.gmane.org>
---
 drivers/spi/spi-xilinx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index 3009121..334f423 100644
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -455,6 +455,9 @@ 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 && xspi->irq != -ENXIO)
+		return xspi->irq;
+
 	if (xspi->irq >= 0) {
 		/* Register for SPI Interrupt */
 		ret = devm_request_irq(&pdev->dev, xspi->irq, xilinx_spi_irq, 0,
-- 
2.1.4

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