From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arjan van de Ven <arjan@infradead.org>
Subject: Re: [PATCH] net: add driver for the NIC on Cell Blades
Date: Tue, 28 Jun 2005 15:53:18 +0200
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References: <200506281528.08834.arnd@arndb.de>
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Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	Utz Bacher <utz.bacher@de.ibm.com>, linuxppc64-dev@ozlabs.org,
	Jeff Garzik <jgarzik@pobox.com>, Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
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To: Arnd Bergmann <arnd@arndb.de>
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On Tue, 2005-06-28 at 15:28 +0200, Arnd Bergmann wrote:
> 
> +static void
> +spider_net_rx_irq_off(struct spider_net_card *card)
> +{
> +       u32 regvalue;
> +       unsigned long flags;
> +
> +       spin_lock_irqsave(&card->intmask_lock, flags);
> +       regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
> +       regvalue &= ~SPIDER_NET_RXINT;
> +       spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
> +       spin_unlock_irqrestore(&card->intmask_lock, flags);
> +}

I think you have a PCI posting bug here....