linux-kernel - Re: [PATCH] pwm: sun4i: redundant assignment to variable pval

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Date:   Wed, 2 Oct 2019 16:29:33 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>, linux-pwm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pwm: sun4i: redundant assignment to variable pval

On Wed, Oct 02, 2019 at 04:25:06PM +0300, Dan Carpenter wrote:
> On Wed, Oct 02, 2019 at 11:08:44AM +0100, Colin King wrote:
> > From: Colin Ian King <colin.king@...onical.com>
> > 
> > Variable pval is being assigned a value that is never read. The
> > assignment is redundant and hence can be removed.
> > 
> > Addresses-Coverity: ("Unused value")
> > Signed-off-by: Colin Ian King <colin.king@...onical.com>
> > ---
> >  drivers/pwm/pwm-sun4i.c | 1 -
> >  1 file changed, 1 deletion(-)
> > 
> > diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
> > index 6f5840a1a82d..53970d4ba695 100644
> > --- a/drivers/pwm/pwm-sun4i.c
> > +++ b/drivers/pwm/pwm-sun4i.c
> > @@ -156,7 +156,6 @@ static int sun4i_pwm_calculate(struct sun4i_pwm_chip *sun4i_pwm,
> >  	if (sun4i_pwm->data->has_prescaler_bypass) {
> >  		/* First, test without any prescaler when available */
> >  		prescaler = PWM_PRESCAL_MASK;
> > -		pval = 1;
> >  		/*
> >  		 * When not using any prescaler, the clock period in nanoseconds
> >  		 * is not an integer so round it half up instead of
> 
> Are you sure?  It looks used to me.

Ah.  Never mind.  My tree was out of date.

regards,
dan carpenter