linux-kernel - Re: [PATCH] char: mxser: remove unnesesary NULL check

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Date:	Fri, 23 Jul 2010 21:18:51 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	Kulikov Vasiliy <segooon@...il.com>
CC:	kernel-janitors@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Alan Cox <alan@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] char: mxser: remove unnesesary NULL check

On 07/23/2010 06:34 PM, Kulikov Vasiliy wrote:
> mxser_transmit_chars(tty, port) is called only from mxser_interrupt().
> NULL check is performed in mxser_interrupt() so it is redundant here.
> 
> Signed-off-by: Kulikov Vasiliy <segooon@...il.com>

Acked-by: Jiri Slaby <jirislaby@...il.com>

> ---
>  drivers/char/mxser.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
> index d2692d4..3fc89da 100644
> --- a/drivers/char/mxser.c
> +++ b/drivers/char/mxser.c
> @@ -2193,7 +2193,7 @@ static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port
>  	port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
>  	port->icount.tx += (cnt - port->xmit_cnt);
>  
> -	if (port->xmit_cnt < WAKEUP_CHARS && tty)
> +	if (port->xmit_cnt < WAKEUP_CHARS)
>  		tty_wakeup(tty);
>  
>  	if (port->xmit_cnt <= 0) {


-- 
js
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