RFC: try this

[Dan Williams]

On Fri, 2008-05-30 at 12:36 +0200, Holger Schurig wrote:
> Hi Dan !
> 
> Can you try the following patch?

Yeah, can do on Monday when I'm back with that machine...  Looking
forward to it :)

Dan

> This survived for me the following maltratation:
> 
> * on host: scp iso1.iso laptop:/tmp
> * on laptop: scp iso2.iso host:/tmp
> * on laptop: while true; iwconfig eth1; sleep 0.1; done
> 
> all at the same time.
> 
> Index: wireless-testing/drivers/net/wireless/libertas/if_cs.c
> ===================================================================
> --- wireless-testing.orig/drivers/net/wireless/libertas/if_cs.c	2008-05-30 11:26:35.000000000 +0200
> +++ wireless-testing/drivers/net/wireless/libertas/if_cs.c	2008-05-30 11:30:09.000000000 +0200
> @@ -379,6 +379,8 @@ static irqreturn_t if_cs_interrupt(int i
>  
>  	/* Ask card interrupt cause register if there is something for us */
>  	cause = if_cs_read16(card, IF_CS_CARD_INT_CAUSE);
> +	lbs_deb_cs("cause 0x%04x\n", cause);
> +
>  	if (cause == 0) {
>  		/* Not for us */
>  		return IRQ_NONE;
> @@ -390,10 +392,6 @@ static irqreturn_t if_cs_interrupt(int i
>  		return IRQ_HANDLED;
>  	}
>  
> -	/* Clear interrupt cause */
> -	if_cs_write16(card, IF_CS_CARD_INT_CAUSE, cause & IF_CS_BIT_MASK);
> -	lbs_deb_cs("cause 0x%04x\n", cause);
> -
>  	if (cause & IF_CS_BIT_RX) {
>  		struct sk_buff *skb;
>  		lbs_deb_cs("rx packet\n");
> @@ -434,6 +432,9 @@ static irqreturn_t if_cs_interrupt(int i
>  		lbs_queue_event(priv, event >> 8 & 0xff);
>  	}
>  
> +	/* Clear interrupt cause */
> +	if_cs_write16(card, IF_CS_CARD_INT_CAUSE, cause & IF_CS_BIT_MASK);
> +
>  	lbs_deb_leave(LBS_DEB_CS);
>  	return IRQ_HANDLED;
>  }