netdev - Re: [PATCH] sky2: Serialize access to PCI config space

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Message-ID: <20090810082721.74edeb1d@nehalam>
Date:	Mon, 10 Aug 2009 08:27:21 -0700
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	Mike McCormack <mikem@...g3k.org>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] sky2: Serialize access to PCI config space

On Sun, 09 Aug 2009 20:37:19 +0900
Mike McCormack <mikem@...g3k.org> wrote:

> 
> Disable NAPI when powering up or down the phy, as sky2_err_intr
>  may also access the PCI config space.
> 

Also access to PCI config is done through shared memory, so each
access is atomic. The only issue is the stupid config write bit;
this bit really doesn't protect from anything useful.
Probably better to just always leave it TST_CFG_WRITE_ON.
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