linux-kernel - Re: [PATCH v4 2/2] ALSA: core: Remove redundant variable and return the last statement

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Date:   Sun, 27 Feb 2022 21:20:45 -0800
From:   Joe Perches <joe@...ches.com>
To:     Meng Tang <tangmeng@...ontech.com>, perex@...ex.cz, tiwai@...e.com
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/2] ALSA: core: Remove redundant variable and return
 the last statement

On Mon, 2022-02-28 at 13:02 +0800, Meng Tang wrote:
> Return the result from file->f_op->open() directly instead of
> taking this in another redundant variable. Make the typical
> return the last statement, return early and reduce the indentation
> too.
> 
> Signed-off-by: Meng Tang <tangmeng@...ontech.com>
> Signed-off-by: Joe Perches <joe@...ches.com>

Hi Meng Tang.

For the next time: it's not necessary (or even good) to add a sign-off
for another person unless they specifically authorize one.

You wrote and are submitting these changes, I merely gave you simple
suggestions as to how you could improve them.

cheers, Joe

> ---
>  sound/sound_core.c | 24 ++++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)
> 
> diff --git a/sound/sound_core.c b/sound/sound_core.c
> index aa4a57e488e5..3332fe321737 100644
> --- a/sound/sound_core.c
> +++ b/sound/sound_core.c
> @@ -577,20 +577,20 @@ static int soundcore_open(struct inode *inode, struct file *file)
>  			new_fops = fops_get(s->unit_fops);
>  	}
>  	spin_unlock(&sound_loader_lock);
> -	if (new_fops) {
> -		/*
> -		 * We rely upon the fact that we can't be unloaded while the
> -		 * subdriver is there.
> -		 */
> -		int err = 0;
> -		replace_fops(file, new_fops);
>  
> -		if (file->f_op->open)
> -			err = file->f_op->open(inode,file);
> +	if (!new_fops)
> +		return -ENODEV;
>  
> -		return err;
> -	}
> -	return -ENODEV;
> +	/*
> +	 * We rely upon the fact that we can't be unloaded while the
> +	 * subdriver is there.
> +	 */
> +	replace_fops(file, new_fops);
> +
> +	if (!file->f_op->open)
> +		return -ENODEV;
> +
> +	return file->f_op->open(inode, file);
>  }
>  
>  MODULE_ALIAS_CHARDEV_MAJOR(SOUND_MAJOR);