netdev - Re: [PATCH kernel 2.6.34-rc5] lib8390: to be SMP safe

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Date:	Fri, 7 May 2010 05:47:48 +0900
From:	Ken Kawasaki <ken_kawasaki@...ing.nifty.jp>
To:	netdev@...r.kernel.org
Subject: Re: [PATCH  kernel 2.6.34-rc5] lib8390: to be SMP safe


Sorry, I cancel this patch
and test it again.


Best Regards
Ken

> 
> lib8390:
> 	write the value "ENISR_ALL" to register "EN0_IMR"
> 	after enable_irq_lockdep_irqrestore. 
> 
> 	This patch avoids frequent transmit error on SMP system.
> 
> 
> Signed-off-by: Ken Kawasaki <ken_kawasaki@...ing.nifty.jp>
> 
> ---
> 
> --- linux-2.6.34-rc6/drivers/net/lib8390.c.orig	2010-05-02 16:49:57.000000000 +0900
> +++ linux-2.6.34-rc6/drivers/net/lib8390.c	2010-05-02 18:09:18.000000000 +0900
> @@ -367,9 +367,9 @@ static netdev_tx_t __ei_start_xmit(struc
>  				dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
>  		ei_local->irqlock = 0;
>  		netif_stop_queue(dev);
> -		ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
>  		spin_unlock(&ei_local->page_lock);
>  		enable_irq_lockdep_irqrestore(dev->irq, &flags);
> +		ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
>  		dev->stats.tx_errors++;
>  		return NETDEV_TX_BUSY;
>  	}
> @@ -407,10 +407,10 @@ static netdev_tx_t __ei_start_xmit(struc
>  
>  	/* Turn 8390 interrupts back on. */
>  	ei_local->irqlock = 0;
> -	ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
>  
>  	spin_unlock(&ei_local->page_lock);
>  	enable_irq_lockdep_irqrestore(dev->irq, &flags);
> +	ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
>  
>  	dev_kfree_skb (skb);
>  	dev->stats.tx_bytes += send_length;

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