linux-kernel - Re: [PATCH v3 12/12] gpio: rockchip: replace mutex

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Message-ID: <Ztc03cbpPjPZatoL@smile.fi.intel.com>
Date: Tue, 3 Sep 2024 19:10:05 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Ye Zhang <ye.zhang@...k-chips.com>
Cc: linus.walleij@...aro.org, brgl@...ev.pl, heiko@...ech.de,
	linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
	mika.westerberg@...ux.intel.com, tao.huang@...k-chips.com,
	finley.xiao@...k-chips.com, tim.chen@...k-chips.com,
	elaine.zhang@...k-chips.com
Subject: Re: [PATCH v3 12/12] gpio: rockchip: replace mutex_lock() with
 guard()

On Tue, Sep 03, 2024 at 03:36:49PM +0800, Ye Zhang wrote:
> Replacing mutex_lock with guard() simplifies the code and helps avoid

mutex_lock()

avoiding

> deadlocks.

...

> --- a/drivers/gpio/gpio-rockchip.c
> +++ b/drivers/gpio/gpio-rockchip.c

+ cleanup.h

...

>  	}
> -	mutex_lock(&bank->deferred_lock);
> +	guard(mutex)(&bank->deferred_lock);

Make it surrounded by blank lines.

> +	ret = rockchip_get_bank_data(bank);
> +	if (ret)
> +		goto err_disabled_clk;

-- 
With Best Regards,
Andy Shevchenko