linux-kernel - Re: [PATCH 2/2] add device function for usb serial console

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Message-ID: <491C40C2.7000302@ru.mvista.com>
Date:	Thu, 13 Nov 2008 17:59:14 +0300
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Kevin Hao <kexin.hao@...driver.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, gregkh@...e.de,
	Alan Cox <alan@...hat.com>, linux-usb@...r.kernel.org
Subject: Re: [PATCH 2/2] add device function for usb serial console

Hello.

Kevin Hao wrote:

> Add device funtion for usb serial console, so we can open /dev/console
> when we use a usb serial device as console.

> Signed-off-by: Kevin Hao <kexin.hao@...driver.com>

> diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c
> index 5b95009..1dbb203 100644
> --- a/drivers/usb/serial/console.c
> +++ b/drivers/usb/serial/console.c
> @@ -241,12 +241,25 @@ static void usb_console_write(struct console *co,
>  	}
>  }
>  
> +static struct tty_driver *usb_console_device(struct console *co, int *index)
> +{
> +	struct tty_driver **p = (struct tty_driver **)co->data;
> +
> +	if (!*p)
> +		return NULL;
> +
> +	*index = co->index;
> +	return (struct tty_driver *)(*p);

    Type cast not needed here.

WBR, Sergei
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