linux-kernel - Re: [PATCH] gpiolib: Fix irq_domain resource tracking for gpiochip_irqchip_add

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Message-ID: <ZIxuExRypHsUejFI@smile.fi.intel.com>
Date:   Fri, 16 Jun 2023 17:13:39 +0300
From:   Andy Shevchenko <andy@...nel.org>
To:     Michael Walle <mwalle@...nel.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiawen Wu <jiawenwu@...stnetic.com>
Subject: Re: [PATCH] gpiolib: Fix irq_domain resource tracking for
 gpiochip_irqchip_add_domain()

On Fri, Jun 16, 2023 at 09:30:06AM +0200, Michael Walle wrote:
> Up until commit 6a45b0e2589f ("gpiolib: Introduce
> gpiochip_irqchip_add_domain()") all irq_domains were allocated
> by gpiolib itself and thus gpiolib also takes care of freeing it.
> 
> With gpiochip_irqchip_add_domain() a user of gpiolib can associate an
> irq_domain with the gpio_chip. This irq_domain is not managed by
> gpiolib and therefore must not be freed by gpiolib.

With or without below nit-pick
Reviewed-by: Andy Shevchenko <andy@...nel.org>

...

>  	/* Remove all IRQ mappings and delete the domain */
> -	if (gc->irq.domain) {
> +	if (!gc->irq.domain_is_ext && gc->irq.domain) {

Looking at this, perhaps positive about allocation?

	domain_is_allocated?

-- 
With Best Regards,
Andy Shevchenko