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From: Greg KH <greg@kroah.com>
To: Brian King <brking@us.ibm.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: userspace pci config space accesses
Date: Wed, 28 Apr 2004 15:52:36 -0700	[thread overview]
Message-ID: <20040428225236.GA27250@kroah.com> (raw)
In-Reply-To: <409026CE.8050905@us.ibm.com>

On Wed, Apr 28, 2004 at 04:49:02PM -0500, Brian King wrote:
> I recently ran into a problem where lspci was trying to read pci config 
> space
> of a pci adapter while the device driver for that adapter was running BIST
> on it. On ppc64, this resulted in a PCI error and puts the slot into an 
> error state making it unusable for the remainder of that system boot.
> Should there be some blocking in place so that userspace pci config
> reads will not occur in these windows or is using tools like lspci
> user beware?

There already is a pci_config_lock that should be grabbed when accessing
pci config space.  It sounds like the driver needs to play a bit nicer
when it's running a self test :)

What driver is doing this?

thanks,

greg k-h

  reply	other threads:[~2004-04-28 22:54 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-04-28 21:49 userspace pci config space accesses Brian King
2004-04-28 22:52 ` Greg KH [this message]
2004-04-28 23:26   ` Brian King
2004-04-28 23:38     ` Greg KH
2004-04-29  0:38       ` Brian King
2004-04-29 10:11         ` Arjan van de Ven
2004-05-01  5:50         ` Greg KH

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