[PATCH] iio: adc: sophgo-saradc: Handle errors from optional IRQ lookup

[phucduc . bui]

From: bui duc phuc <phucduc.bui@xxxxxxxxx>

platform_get_irq_optional() returns a positive IRQ number on success or
a negative error code on failure. For an optional IRQ, -ENXIO indicates
that no optional IRQ is available. Other errors, such as -EPROBE_DEFER
and -EINVAL, should be propagated so that the caller can handle them
appropriately.

Propagate negative errors other than -ENXIO.

Signed-off-by: bui duc phuc <phucduc.bui@xxxxxxxxx>
---
 drivers/iio/adc/sophgo-cv1800b-adc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/adc/sophgo-cv1800b-adc.c b/drivers/iio/adc/sophgo-cv1800b-adc.c
index bdc3e1326a9a..c6eed09acfcd 100644
--- a/drivers/iio/adc/sophgo-cv1800b-adc.c
+++ b/drivers/iio/adc/sophgo-cv1800b-adc.c
@@ -182,6 +182,8 @@ static int cv1800b_adc_probe(struct platform_device *pdev)
 		return PTR_ERR(saradc->regs);
 
 	saradc->irq = platform_get_irq_optional(pdev, 0);
+	if (saradc->irq < 0 && saradc->irq != -ENXIO)
+		return saradc->irq;
 	if (saradc->irq > 0) {
 		init_completion(&saradc->completion);
 		ret = devm_request_irq(dev, saradc->irq,
-- 
2.43.0