linux-kernel - Re: [PATCH] staging: fieldbus: anybuss: Remove unnecessary variables

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Message-ID: <20190523072220.GC24998@kroah.com>
Date:   Thu, 23 May 2019 09:22:20 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Nishka Dasgupta <nishka.dasgupta@...oo.com>
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: fieldbus: anybuss: Remove unnecessary variables

On Thu, May 23, 2019 at 12:05:01PM +0530, Nishka Dasgupta wrote:
> In the functions export_reset_0 and export_reset_1 in arcx-anybus.c,
> the only operation performed before return is passing the variable cd
> (which takes the value of a function call on one of the parameters) as
> argument to another function. Hence the variable cd can be removed.
> Issue found using Coccinelle.
> 
> Signed-off-by: Nishka Dasgupta <nishka.dasgupta@...oo.com>
> ---
>  drivers/staging/fieldbus/anybuss/arcx-anybus.c | 8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/staging/fieldbus/anybuss/arcx-anybus.c b/drivers/staging/fieldbus/anybuss/arcx-anybus.c
> index 2ecffa42e561..e245f940a5c4 100644
> --- a/drivers/staging/fieldbus/anybuss/arcx-anybus.c
> +++ b/drivers/staging/fieldbus/anybuss/arcx-anybus.c
> @@ -87,16 +87,12 @@ static int anybuss_reset(struct controller_priv *cd,
>  
>  static void export_reset_0(struct device *dev, bool assert)
>  {
> -	struct controller_priv *cd = dev_get_drvdata(dev);
> -
> -	anybuss_reset(cd, 0, assert);
> +	anybuss_reset(dev_get_drvdata(dev), 0, assert);
>  }

While your patch is "correct", it's not the nicest thing.  The way the
code looks today is to make it obvious we are passing a pointer to a
struct controller_priv() into anybuss_reset().  But with your change, it
looks like we are passing any random void pointer to it.

So I'd prefer the original code please.

Also, you forgot to cc: Sven on this patch, please always use the output
of scripts/get_maintainer.pl.

thanks,

greg k-h