linux-kernel - Re: [PATCH] wireless, airo: waitbusy() won't delay

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Date:	Tue, 13 May 2008 17:43:13 -0400
From:	Dan Williams <dcbw@...hat.com>
To:	Roel Kluin <roel.kluin@...il.com>
Cc:	breed@...rs.sourceforge.net, linux-wireless@...r.kernel.org,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] wireless, airo: waitbusy() won't delay

On Tue, 2008-05-13 at 22:12 +0200, Roel Kluin wrote:
> There will be no delay even when COMMAND_BUSY (defined 0x8000) is set:
> 0x8000 & (delay < 10000) will evaluate to 0 - when delay is 0.
> 
> Signed-off-by: Roel Kluin <roel.kluin@...il.com>

Good catch.

Acked-by: Dan Williams <dcbw@...hat.com>

> ---
> diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c
> index 45f47c1..efb7444 100644
> --- a/drivers/net/wireless/airo.c
> +++ b/drivers/net/wireless/airo.c
> @@ -2904,7 +2904,7 @@ EXPORT_SYMBOL(init_airo_card);
>  
>  static int waitbusy (struct airo_info *ai) {
>  	int delay = 0;
> -	while ((IN4500 (ai, COMMAND) & COMMAND_BUSY) & (delay < 10000)) {
> +	while ((IN4500 (ai, COMMAND) & COMMAND_BUSY) && (delay < 10000)) {
>  		udelay (10);
>  		if ((++delay % 20) == 0)
>  			OUT4500(ai, EVACK, EV_CLEARCOMMANDBUSY);
> 
> 
> 
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