linux-kernel - Re: [PATCH 2/3] tty: vcc: Drop unnecessary if block

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Date:   Fri, 15 Jan 2021 09:20:24 +0100
From:   Jiri Slaby <jirislaby@...nel.org>
To:     Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     "David S . Miller" <davem@...emloft.net>,
        linuxppc-dev@...ts.ozlabs.org, sparclinux@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] tty: vcc: Drop unnecessary if block

On 14. 01. 21, 18:57, Uwe Kleine-König wrote:
> If vcc_probe() succeeded dev_set_drvdata() is called with a non-NULL
> value, and if vcc_probe() failed vcc_remove() isn't called.
> 
> So there is no way dev_get_drvdata() can return NULL in vcc_remove() and
> the check can just go away.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

Reviewed-by: Jiri Slaby <jirislaby@...nel.org>

> ---
>   drivers/tty/vcc.c | 3 ---
>   1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c
> index 9ffd42e333b8..d9b0dc6deae9 100644
> --- a/drivers/tty/vcc.c
> +++ b/drivers/tty/vcc.c
> @@ -681,9 +681,6 @@ static int vcc_remove(struct vio_dev *vdev)
>   {
>   	struct vcc_port *port = dev_get_drvdata(&vdev->dev);
>   
> -	if (!port)
> -		return -ENODEV;
> -
>   	del_timer_sync(&port->rx_timer);
>   	del_timer_sync(&port->tx_timer);
>   
> 


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