linux-kernel - Re: [PATCH][next] pwm: core: remove redundant assignment to pointer pwm

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Date:   Tue, 6 Jul 2021 17:58:20 +0200
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Colin King <colin.king@...onical.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Lee Jones <lee.jones@...aro.org>, linux-pwm@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH][next] pwm: core: remove redundant assignment to pointer
 pwm

Hello,

[adding Andy and Rafael to Cc:]

On Tue, Jul 06, 2021 at 04:11:32PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The pointer pwm is being initialized with a value that is never read and
> it is being updated later with a new value. The initialization is
> redundant and can be removed.
> 
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/pwm/core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
> index a28c8639af5b..35e894f4a379 100644
> --- a/drivers/pwm/core.c
> +++ b/drivers/pwm/core.c
> @@ -846,7 +846,7 @@ EXPORT_SYMBOL_GPL(of_pwm_get);
>   */
>  static struct pwm_device *acpi_pwm_get(const struct fwnode_handle *fwnode)
>  {
> -	struct pwm_device *pwm = ERR_PTR(-ENODEV);
> +	struct pwm_device *pwm;
>  	struct fwnode_reference_args args;
>  	struct pwm_chip *chip;
>  	int ret;

LGTM:

Acked-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

and if you want:

Fixes: e5c38ba9f281 ("pwm: core: Reuse fwnode_to_pwmchip() in ACPI case")

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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