linux-kernel - Re: [PATCH v2 10/10] gpiolib: remove gpiochip_is

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Message-ID: <ZWi8X7pQpUm-nIpN@smile.fi.intel.com>
Date:   Thu, 30 Nov 2023 18:46:23 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v2 10/10] gpiolib: remove gpiochip_is_requested()

On Thu, Nov 30, 2023 at 02:46:30PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> We have no external users of gpiochip_is_requested(). Let's remove it
> and replace its internal calls with direct testing of the REQUESTED flag.

...

> -	cpy = kstrdup(label, GFP_KERNEL);
> -	if (!cpy)
> -		return ERR_PTR(-ENOMEM);
> +	scoped_guard(spinlock_irqsave, &gpio_lock) {
> +		if (!test_bit(FLAG_REQUESTED, &desc->flags))
> +			return NULL;

> +		cpy = kstrdup(desc->label, GFP_KERNEL);
> +		if (!cpy)
> +			return ERR_PTR(-ENOMEM);

You just introduced these lines earlier in the series, and here you moved
them again. With guard() instead it may be kept in a better shape.

> +	}

-- 
With Best Regards,
Andy Shevchenko