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

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Message-ID: <ZS/Wr9ShnEe3umeY@dorcaslitunya-virtual-machine>
Date:   Wed, 18 Oct 2023 15:59:27 +0300
From:   Dorcas Litunya <anonolitunya@...il.com>
To:     Julia Lawall <julia.lawall@...ia.fr>
Cc:     outreachy@...ts.linux.dev, dan.carpenter@...aro.org,
        andi.shyti@...ux.intel.com,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        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 02:06:41PM +0200, Julia Lawall wrote:
> 
> 
> 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@...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;
> 
> 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.
>
I agree Julia. I will remove the setting part for ret = -1 but keep the
ret variable just in case it is being used by parts of the function not
shown. Thanks for the feedback.

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