Re: [PATCH 2/4] ipmi: bt-bmc: Handle -ENXIO from optional IRQ lookup

[Corey Minyard]

On Mon, Aug 17, 2026 at 05:50:39PM +0700, phucduc.bui@xxxxxxxxx wrote:
> From: bui duc phuc <phucduc.bui@xxxxxxxxx>
> 
> platform_get_irq_optional() can return -ENXIO when no IRQ resource is
> available, as well as other negative error codes.
> 
> The probe path supports running without an IRQ by falling back to
> the timer. Treat -ENXIO as the no-IRQ case while propagating other
> errors to the caller.

This is obviously wrong, it will pass -ENXIO into devm_request_irq()
if returned.

-corey

> 
> Signed-off-by: bui duc phuc <phucduc.bui@xxxxxxxxx>
> ---
>  drivers/char/ipmi/bt-bmc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/char/ipmi/bt-bmc.c b/drivers/char/ipmi/bt-bmc.c
> index 7d3944bda8db..4c5457c88503 100644
> --- a/drivers/char/ipmi/bt-bmc.c
> +++ b/drivers/char/ipmi/bt-bmc.c
> @@ -380,7 +380,7 @@ static int bt_bmc_config_irq(struct bt_bmc *bt_bmc,
>  	u32 reg;
>  
>  	bt_bmc->irq = platform_get_irq_optional(pdev, 0);
> -	if (bt_bmc->irq < 0)
> +	if (bt_bmc->irq < 0 && bt_bmc->irq != -ENXIO)
>  		return bt_bmc->irq;
>  
>  	rc = devm_request_irq(dev, bt_bmc->irq, bt_bmc_irq, IRQF_SHARED,
> -- 
> 2.43.0
>