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

From: Stephen Hemminger <[email-masked]>
Date: Mon, 10 Aug 2009 08:27:21 -0700

On Sun, 09 Aug 2009 20:37:19 +0900
Mike McCormack <[email-masked]> 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.