linux-kernel - Re: [PATCH 16/20] misc: genwqe: card_base: Remove set but unused variable 'rc'

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Message-ID: <20200630074224.GH1179328@dell>
Date:   Tue, 30 Jun 2020 08:42:24 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     haver <haver@...ux.vnet.ibm.com>
Cc:     arnd@...db.de, gregkh@...uxfoundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Michael Jung <mijung@....net>,
        Michael Ruettger <michael@...ra.de>,
        Frank Haverkamp <haver@...ux.ibm.com>,
        Joerg-Stephan Vogt <jsvogt@...ibm.com>
Subject: Re: [PATCH 16/20] misc: genwqe: card_base: Remove set but unused
 variable 'rc'

On Tue, 30 Jun 2020, haver wrote:

> On 2020-06-29 16:04, Lee Jones wrote:
> > Variable 'rc' hasn't been checked since the driver's inception
> > in 2013.  If it hasn't caused any issues since then, it's unlikely
> > to in the future.  Let's take it out for now.
> > 
> > Fixes the following W=1 kernel build warning(s):
> > 
> >  drivers/misc/genwqe/card_base.c: In function
> > ‘genwqe_health_check_stop’:
> > 
> > /home/lee/projects/linux/kernel/drivers/misc/genwqe/card_base.c:1046:6:
> > warning: variable ‘rc’ set but not used
> > [-Wunused-but-set-variable]
> >  1046 | int rc;
> >  | ^~
> > 
> > Cc: Michael Jung <mijung@....net>
> > Cc: Michael Ruettger <michael@...ra.de>
> > Cc: Frank Haverkamp <haver@...ux.ibm.com>
> > Cc: Joerg-Stephan Vogt <jsvogt@...ibm.com>
> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
> > ---
> >  drivers/misc/genwqe/card_base.c | 4 +---
> >  1 file changed, 1 insertion(+), 3 deletions(-)
> > 
> > diff --git a/drivers/misc/genwqe/card_base.c
> > b/drivers/misc/genwqe/card_base.c
> > index 1dc6c7c5cbce9..bceebf49de2d5 100644
> > --- a/drivers/misc/genwqe/card_base.c
> > +++ b/drivers/misc/genwqe/card_base.c
> > @@ -1043,12 +1043,10 @@ static int genwqe_health_thread_running(struct
> > genwqe_dev *cd)
> > 
> >  static int genwqe_health_check_stop(struct genwqe_dev *cd)
> >  {
> > -	int rc;
> > -
> >  	if (!genwqe_health_thread_running(cd))
> >  		return -EIO;
> > 
> > -	rc = kthread_stop(cd->health_thread);
> > +	kthread_stop(cd->health_thread);
> >  	cd->health_thread = NULL;
> >  	return 0;
> >  }
> 
> Good idea. Let's remove it Thanks for the contribution.

No problem, and you are welcome.

> Signed-off-by: Frank Haverkamp <haver@...ux.ibm.com>

Just as an aside, this should be Acked-by, unless you either
contributed to the patch directly or are in the delivery path i.e. you
plan to pick the patch and send it to, say Linus, via a pull-request.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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