linux-kernel - Re: [PATCH] media: atomisp: pci: remove unneeded variable 'err'akari.ailus@...ux.intel.com,

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Date:   Wed, 28 Apr 2021 10:24:54 +0530
From:   SAURAV GIREPUNJE <saurav.girepunje@...il.com>
To:     Fabio Aiuto <fabioaiuto83@...il.com>
Cc:     mchehab@...nel.org, sakari.ailus@...ux.intel.com,
        gregkh@...uxfoundation.org, saurav.girepunje@...il.com,
        linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org, saurav.girepunje@...mail.com
Subject: Re: [PATCH] media: atomisp: pci: remove unneeded variable
 'err'akari.ailus@...ux.intel.com,

On Sun, Apr 18, 2021 at 05:07:09PM +0200, Fabio Aiuto wrote:
> On Sun, Apr 18, 2021 at 08:13:23PM +0530, Saurav Girepunje wrote:
> > Fix the following coccicheck warning:
> > 
> > drivers/staging/media/atomisp/pci/sh_css_mipi.c:39:5-8:
> > Unneeded variable: "err". Return "0" on line 44
> > 
> > Signed-off-by: Saurav Girepunje <saurav.girepunje@...gle.com>
> > ---
> >  drivers/staging/media/atomisp/pci/sh_css_mipi.c | 3 +--
> >  1 file changed, 1 insertion(+), 2 deletions(-)
> > 
> > diff --git a/drivers/staging/media/atomisp/pci/sh_css_mipi.c b/drivers/staging/media/atomisp/pci/sh_css_mipi.c
> > index d5ae7f0b5864..708903a31b08 100644
> > --- a/drivers/staging/media/atomisp/pci/sh_css_mipi.c
> > +++ b/drivers/staging/media/atomisp/pci/sh_css_mipi.c
> > @@ -36,12 +36,11 @@ ref_count_mipi_allocation[N_CSI_PORTS]; /* Initialized in mipi_init */
> >  int
> >  ia_css_mipi_frame_specify(const unsigned int size_mem_words,
> >  			  const bool contiguous) {
> > -	int err = 0;
> >  
> >  	my_css.size_mem_words = size_mem_words;
> >  	(void)contiguous;
> >  
> > -	return err;
> > +	return 0;
> >  }
> >  
> >  /*
> > -- 
> > 2.25.1
> > 
> > 
> 
> Hi Saurav,
> 
> this ia_css_mipi_frame_specify seems to be unused. On
> header file, before the prototype it is said that it could
> be removed only when all drivers moved to a new API.
> 
> Is that comment obsolete?
> 
> thank you,
> 
> fabio

yes this ia_css_mipi_frame_specify is unused. On header file 

/* Backward compatible for CSS API 2.0 only
 * TO BE REMOVED when all drivers move to CSS API 2.1.
 */

 deprecated{Use ia_css_mipi_buffer_config instead.}

new api also suggested on comment.

saurav