[PATCH 2/2] rtc: cmos: Propagate errors from optional IRQ lookup

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

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, while other errors should be propagated.

Propagate all error codes returned by platform_get_irq_optional() other
than -ENXIO, while preserving -1 for the case where no optional IRQ is
available.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 drivers/rtc/rtc-cmos.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index fa04ece151b8..0a2c7383c8cd 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -1436,7 +1436,9 @@ static int __init cmos_platform_probe(struct platform_device *pdev)
 	else
 		resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	irq = platform_get_irq_optional(pdev, 0);
-	if (irq < 0) {
+	if (irq < 0 && irq != -ENXIO)
+		return irq;
+	if (irq == -ENXIO) {
 		irq = -1;
 #ifdef CONFIG_X86
 		/*
-- 
2.43.0