From mboxrd@z Thu Jan 1 00:00:00 1970 From: Len Brown Subject: pci bridge suspend/resume (Re: PCI not restored correctly after suspend to ram) Date: 20 Mar 2004 00:46:04 -0500 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <1079761564.7274.730.camel@dhcppc4> References: <200403180935.09436.stefan.doesinger@gym-leoben.asn-graz.ac.at> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200403180935.09436.stefan.doesinger-dYJrdcitkgg0+Ua9VpOLR6Q1ief8SNuKXqFh9Ls21Oc@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: stefan.doesinger-dYJrdcitkgg0+Ua9VpOLR6Q1ief8SNuKXqFh9Ls21Oc@public.gmane.org, "linux-pci-jyMamyUUXNJG4ohzP4jBZS1Fcj925eT/@public.gmane.org" Cc: ACPI Developers List-Id: linux-acpi@vger.kernel.org Linux PCI list, Stefan noticed bits changing in the config space for his PCI/PCI bridge across a C3 suspend/resume. Is there any software in Linux responsible for preserving and restoring the PCI config space for PCI/PCI bridges across a suspend/resume? thanks, -Len -------- > 00:1e.0 PCI bridge: Intel Corp. 82801BAM/CAM PCI Bridge (rev 83) (prog-if 00 [Normal decode]) - 00: 86 80 48 24 07 01 80 88 83 00 04 06 00 00 01 00 + 00: 86 80 48 24 05 01 80 80 83 00 04 06 00 00 01 00 byte 4 bit 1 is memory access enable. I suspect it is a bug that this went away across suspend/resume. byte 7 bit2 is Target abort in the status register -- benign I think -- we can't set this bit anyway. - 10: 00 00 00 00 00 00 00 00 00 02 02 40 40 40 80 32 + 10: 00 00 00 00 00 00 00 00 00 02 02 40 40 40 80 22 byte 31 bit 4 is bit 12 of the bridge secondary status register -- target abort -- which we can't set and is 0 after reset, so this one looks benign also. ------------------------------------------------------- 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