[PATCH linux dev-6.18 4/4] watchdog: aspeed: Propagate errors from optional IRQ lookup

[Vince Chang <vince_chang@aspeedtech.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 IRQ is available, while other errors should be propagated.

Propagate errors such as -EPROBE_DEFER and -EINVAL instead of continuing
probe without the IRQ.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Link: https://lore.kernel.org/r/20260807081652.38692-4-phucduc.bui@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
(cherry picked from commit 1f3c3fa76ddbc2eb92b60c5d4db24d7f702a7811)
Signed-off-by: Vince Chang <vince_chang@aspeedtech.com>
---
 drivers/watchdog/aspeed_wdt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c
index c9e79851504c..48454ac86074 100644
--- a/drivers/watchdog/aspeed_wdt.c
+++ b/drivers/watchdog/aspeed_wdt.c
@@ -429,6 +429,8 @@ static int aspeed_wdt_probe(struct platform_device *pdev)
 	if (wdt->cfg->irq_mask) {
 		int irq = platform_get_irq_optional(pdev, 0);
 
+		if (irq < 0 && irq != -ENXIO)
+			return irq;
 		if (irq > 0) {
 			ret = devm_request_irq(dev, irq, aspeed_wdt_irq,
 					       IRQF_SHARED, dev_name(dev),
-- 
2.43.0