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Date:   Wed, 18 Oct 2023 14:06:41 +0200 (CEST)
From:   Julia Lawall <julia.lawall@inria.fr>
To:     Dorcas AnonoLitunya <anonolitunya@gmail.com>
cc:     outreachy@lists.linux.dev, dan.carpenter@linaro.org,
        andi.shyti@linux.intel.com,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Sudip Mukherjee <sudipm.mukherjee@gmail.com>,
        Teddy Wang <teddy.wang@siliconmotion.com>,
        linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] staging: sm750fb: Remove unused return value in
 program_mode_registers()
In-Reply-To: <492e63bbc58147fb534930ef9e1fb5d844ae8769.1697619623.git.anonolitunya@gmail.com>
Message-ID: <4b7129ae-27f9-7ff4-845-9c327aff488c@inria.fr>
References: <cover.1697619623.git.anonolitunya@gmail.com> <492e63bbc58147fb534930ef9e1fb5d844ae8769.1697619623.git.anonolitunya@gmail.com>
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On Wed, 18 Oct 2023, 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@linuxfoundation.org>
> Signed-off-by: Dorcas AnonoLitunya <anonolitunya@gmail.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;

Is it still useful to have ret = -1?  Maybe the ret variable is not useful
at all any more, but one would have to check the parts of the function
that aren't shown.

julia

>  	}
> -	return ret;
>  }
>
>  int ddk750_set_mode_timing(struct mode_parameter *parm, enum clock_type clock)
> --
> 2.42.0.345.gaab89be2eb
>
>