spi: xilinx: Handle errors from platform_get_irq()

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>

diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index 3009121..e62eb9a 100644 (file)
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -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);