Re: [PATCH 1/2] watchdog: orion_wdt: Propagate -EPROBE_DEFER from IRQ lookup

Guenter Roeck <[email protected]> Thu, 6 Aug 2026 02:30:58 -0700

Newsgroups	org.kernel.vger.linux-watchdog,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>

On 8/5/26 23:28, [email protected] wrote:
> From: bui duc phuc <[email protected]>
> 
> Return -EPROBE_DEFER from platform_get_irq_optional() so the driver is
> re-probed when the interrupt resource becomes available instead of
> continuing probe without an IRQ.
> 
> Signed-off-by: bui duc phuc <[email protected]>
> ---
>   drivers/watchdog/orion_wdt.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c
> index 0e145f762f6f..8595073a8179 100644
> --- a/drivers/watchdog/orion_wdt.c
> +++ b/drivers/watchdog/orion_wdt.c
> @@ -606,6 +606,8 @@ static int orion_wdt_probe(struct platform_device *pdev)
>   
>   	/* Request the IRQ only after the watchdog is disabled */
>   	irq = platform_get_irq_optional(pdev, 0);
> +	if (irq == -EPROBE_DEFER)
> +		return irq;

I think this should be

	if (irq < 0 && irq != -ENXIO)
		return irq;

Guenter

>   	if (irq > 0) {
>   		/*
>   		 * Not all supported platforms specify an interrupt for the