linux-kernel - Re: [PATCH v5 2/7] gpio: ep93xx: Fix single irqchip with multi gpiochips

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Date:   Tue, 9 Feb 2021 15:51:58 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Nikita Shubin <nikita.shubin@...uefel.me>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Alexander Sverdlin <alexander.sverdlin@...il.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 2/7] gpio: ep93xx: Fix single irqchip with multi gpiochips

On Tue, Feb 9, 2021 at 2:54 PM Nikita Shubin <nikita.shubin@...uefel.me> wrote:
> On Tuesday, 9 February 2021 15:46:19 MSK Andy Shevchenko wrote:
> >On Tue, Feb 9, 2021 at 2:35 PM Nikita Shubin
> <nikita.shubin@...uefel.me> wrote:
> >> On Monday, 8 February 2021 16:20:17 MSK Andy Shevchenko wrote:
> >> >On Mon, Feb 8, 2021 at 11:00 AM Nikita Shubin
> >> <nikita.shubin@...uefel.me> wrote:

...

> >> >> +       ic->name = devm_kasprintf(dev, GFP_KERNEL, "gpio-irq-%s",
> >> >> label);
> >> >
> >> >Is the label being NULL okay?
>
> You mean ENOMEM should be honored ? I think you are right about it.

Depending on what is the answer to the question below. If NULL label
is okay (and here is just optional) then simply comment it in the
code, otherwise check is missed.

> >> The label is taken from ep93xx_gpio_banks[], so unless we explicitly
> >> pass zero to ep93xx_init_irq_chip(), we are ok.
> >
> >Maybe I was unclear, let me rephrase: Is the *resulting* label being
> >NULL okay?

-- 
With Best Regards,
Andy Shevchenko