linux-kernel - Re: [PATCH 2/2] staging: sm750fb: Remove unused return value in program_mode

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Message-ID: <2023101846-synopses-paralyses-d1ee@gregkh>
Date:   Wed, 18 Oct 2023 11:26:33 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Dorcas AnonoLitunya <anonolitunya@...il.com>
Cc:     outreachy@...ts.linux.dev, julia.lawall@...ia.fr,
        dan.carpenter@...aro.org, andi.shyti@...ux.intel.com,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>,
        Teddy Wang <teddy.wang@...iconmotion.com>,
        linux-fbdev@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] staging: sm750fb: Remove unused return value in
 program_mode_registers()

On Wed, Oct 18, 2023 at 12:07:38PM +0300, Dorcas AnonoLitunya wrote:
> Modifies the return type of program_mode_registers()
> to void from int as the return value is being ignored in
> all subsequent function calls.
> 
> This improves code readability and maintainability.
> 
> Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Dorcas AnonoLitunya <anonolitunya@...il.com>
> ---
>  drivers/staging/sm750fb/ddk750_mode.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/staging/sm750fb/ddk750_mode.c b/drivers/staging/sm750fb/ddk750_mode.c
> index 83ace6cc9583..e15039238232 100644
> --- a/drivers/staging/sm750fb/ddk750_mode.c
> +++ b/drivers/staging/sm750fb/ddk750_mode.c
> @@ -73,8 +73,8 @@ display_control_adjust_sm750le(struct mode_parameter *mode_param,
>  }
>  
>  /* only timing related registers will be  programed */
> -static int program_mode_registers(struct mode_parameter *mode_param,
> -				  struct pll_value *pll)
> +static void program_mode_registers(struct mode_parameter *mode_param,
> +				   struct pll_value *pll)
>  {
>  	int ret = 0;
>  	int cnt = 0;
> @@ -202,7 +202,6 @@ static int program_mode_registers(struct mode_parameter *mode_param,
>  	} else {
>  		ret = -1;

Why are you still setting the 'ret' variable if you are not doing
anything with it anymore?

>  	}
> -	return ret;

Are you sure that the caller shouldn't be checking for errors instead of
dropping the return value?  If so, document that in the changelog too.

thanks,

greg k-h