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watchdog: stm32_iwdg: Propagate errors from optional IRQ lookup

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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/20260807080447.35479-2-phucduc.bui@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
bui duc phuc
2026-08-10 09:00:05 -07:00
committed by Guenter Roeck
parent ac4bf51d4d
commit 553edb793e
1 changed files with 4 additions and 1 deletions
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drivers/watchdog/stm32_iwdg.c
+4 -1
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@@ -287,8 +287,11 @@ static int stm32_iwdg_irq_init(struct platform_device *pdev,
return 0;
irq = platform_get_irq_optional(pdev, 0);
if (irq <= 0)
if (irq < 0) {
if (irq != -ENXIO)
return irq;
return 0;
}
if (of_property_read_bool(np, "wakeup-source")) {
ret = devm_device_init_wakeup(dev);