linux-kernel - Re: [PATCH v2 3/4] gpio: sifive: Get the parent IRQ's domain from its irq

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Message-ID: <ZLgbiIMVqYoe/OcN@smile.fi.intel.com>
Date:   Wed, 19 Jul 2023 20:21:12 +0300
From:   Andy Shevchenko <andy@...nel.org>
To:     Samuel Holland <samuel.holland@...ive.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v2 3/4] gpio: sifive: Get the parent IRQ's domain from
 its irq_data

On Wed, Jul 19, 2023 at 12:03:46PM -0500, Samuel Holland wrote:
> On 2023-07-19 11:54 AM, Andy Shevchenko wrote:
> > On Wed, Jul 19, 2023 at 09:34:44AM -0700, Samuel Holland wrote:

...

> > Also, can irq_get_irq_data() return NULL? Needs a comment on top
> > of that assignment or an additional check.
> 
> No, the earlier loop already verified the IRQ number was valid. I don't think it
> can later become invalid. In any case, we already dereference the result of
> irq_get_irq_data(irq_number[foo]) in sifive_gpio_child_to_parent_hwirq().

Thanks for explanation, just add a comment.

-- 
With Best Regards,
Andy Shevchenko