linux-kernel - Re: [PATCH v7 30/34] i2c: tegra: Clean up variable names

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Date:   Thu, 17 Sep 2020 14:21:05 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Jonathan Hunter <jonathanh@...dia.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-i2c@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 30/34] i2c: tegra: Clean up variable names

On Wed, Sep 09, 2020 at 01:40:02AM +0300, Dmitry Osipenko wrote:
> Rename "ret" variables to "err" in order to make code a bit more
> expressive, emphasizing that the returned value is an error code.
> Same vice versa, where appropriate.
> 
> Rename variable "reg" to "val" in order to better reflect the actual
> usage of the variable in the code and to make naming consistent with
> the rest of the code.
> 
> Use briefer names for a few members of the tegra_i2c_dev structure in
> order to improve readability of the code.
> 
> All dev/&pdev->dev are replaced with i2c_dev->dev in order to have uniform
> code style across the driver.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/i2c/busses/i2c-tegra.c | 173 ++++++++++++++++-----------------
>  1 file changed, 86 insertions(+), 87 deletions(-)

That's indeed a nice improvement. One thing did spring out at me,
though.

> diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
[...]
> @@ -1831,20 +1830,20 @@ static int __maybe_unused tegra_i2c_runtime_suspend(struct device *dev)
>  
>  	clk_bulk_disable(i2c_dev->nclocks, i2c_dev->clocks);
>  
> -	return pinctrl_pm_select_idle_state(i2c_dev->dev);
> +	return pinctrl_pm_select_idle_state(dev);
>  }
>  
>  static int __maybe_unused tegra_i2c_suspend(struct device *dev)
>  {
>  	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
> -	int err = 0;
> +	int ret = 0;
>  
>  	i2c_mark_adapter_suspended(&i2c_dev->adapter);
>  
>  	if (!pm_runtime_status_suspended(dev))
> -		err = tegra_i2c_runtime_suspend(dev);
> +		ret = tegra_i2c_runtime_suspend(dev);
>  
> -	return err;
> +	return ret;
>  }

Isn't this exactly the opposite of what the commit message says (and the
rest of the patch does)?

Thierry

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