From 553edb793e5be81a0d9bdb7b5aa2f9f1e0eb237b Mon Sep 17 00:00:00 2001 From: bui duc phuc Date: Fri, 7 Aug 2026 15:04:47 +0700 Subject: [PATCH] watchdog: stm32_iwdg: Propagate errors from optional IRQ lookup 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 Link: https://lore.kernel.org/r/20260807080447.35479-2-phucduc.bui@gmail.com Signed-off-by: Guenter Roeck --- drivers/watchdog/stm32_iwdg.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/watchdog/stm32_iwdg.c b/drivers/watchdog/stm32_iwdg.c index b356a272ff9a..a8d2db2d3cf8 100644 --- a/drivers/watchdog/stm32_iwdg.c +++ b/drivers/watchdog/stm32_iwdg.c @@ -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);