From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Grundler Subject: Re: pci bridge suspend/resume (Re: PCI not restored correctly after suspend to ram) Date: Tue, 23 Mar 2004 09:07:30 -0700 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <20040323160730.GA14114@colo.lackof.org> References: <200403180935.09436.stefan.doesinger@gym-leoben.asn-graz.ac.at> <1079761564.7274.730.camel@dhcppc4> <405C00C6.3010805@pobox.com> <20040320134542.GV25059@parcelfarce.linux.theplanet.co.uk> <20040320181000.GA8272@kroah.com> <20040322223425.GB3213@neo.rr.com> <20040323092338.A21352@flint.arm.linux.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20040323092338.A21352-f404yB8NqCZvn6HldHNs0ANdhmdF6hFW@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Russell King Cc: Adam Belay , Greg KH , Matthew Wilcox , Jeff Garzik , Len Brown , stefan.doesinger-dYJrdcitkgg0+Ua9VpOLR6Q1ief8SNuKXqFh9Ls21Oc@public.gmane.org, "linux-pci-jyMamyUUXNJG4ohzP4jBZS1Fcj925eT/@public.gmane.org" , ACPI Developers List-Id: linux-acpi@vger.kernel.org On Tue, Mar 23, 2004 at 09:23:38AM +0000, Russell King wrote: > There's also the problem of devices which don't have a driver loaded. > For instance, if you suspend and power down a cardbus bridge which > hasn't had yenta_socket loaded, you could loose the extra configuration > information in TI bridges necessary for IRQ routing, which we won't > be able to recover at a later point in time. > > Do we even care about this? Short of adding hooks to call BIOS, I don't see any "clean" way to deal with this. I gather BIOS is the only code that knows the IRQ routing info. If the IRQ routing info is advertised elsewhere by the BIOS/EFI, we could add code to (eg) yenta_socket to look for it. grant ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click