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

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Message-ID: <d67c2091-3029-1cf1-5548-b9f3116cd139@canonical.com>
Date:   Wed, 2 Oct 2019 14:30:29 +0100
From:   Colin Ian King <colin.king@...onical.com>
To:     Dan Carpenter <dan.carpenter@...cle.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 02/10/2019 14:29, Dan Carpenter wrote:
> 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  My tree was out of date.

No problem. I appreciated you eyeballing my fixes.
> 
> regards,
> dan carpenter
>