Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756054AbYCVS3V (ORCPT ); Sat, 22 Mar 2008 14:29:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752656AbYCVS3F (ORCPT ); Sat, 22 Mar 2008 14:29:05 -0400 Received: from einhorn.in-berlin.de ([192.109.42.8]:53626 "EHLO einhorn.in-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752832AbYCVS3A (ORCPT ); Sat, 22 Mar 2008 14:29:00 -0400 X-Envelope-From: stefanr@s5r6.in-berlin.de Message-ID: <47E54FA6.3060809@s5r6.in-berlin.de> Date: Sat, 22 Mar 2008 19:27:50 +0100 From: Stefan Richter User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.12) Gecko/20080219 SeaMonkey/1.1.8 MIME-Version: 1.0 To: Thomas Meyer CC: "Rafael J. Wysocki" , LKML , Adrian Bunk , Andrew Morton , Linus Torvalds , Natalie Protasevich Subject: Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reported regressions from 2.6.24) References: <200803220259.48534.rjw@sisk.pl> <47E5350D.101@s5r6.in-berlin.de> <47E540E7.7030108@m3y3r.de> In-Reply-To: <47E540E7.7030108@m3y3r.de> X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1600 Lines: 40 Thomas Meyer wrote: > Stefan Richter schrieb: >> - Several or all of ohci1394's MMIO reads return ~0 (all bits set >> to one) --- or 0 --- where different values are expected. >> >> - In http://lkml.org/lkml/2008/2/23/244 we get to see a >> WARNING: at arch/x86/mm/ioremap.c:137 __ioremap+0xa7/0x16a() >> which is "WARN_ON_ONCE(page_is_ram(pfn));". >> After that, the failures start. >> But before that, "Unknown symbol" messages pop up when ohci1394 >> is loaded. These symbols are implemented by ieee1394 on which >> ohci1394 depends. ... >> Thomas, you wrote in http://lkml.org/lkml/2008/3/17/316 that the >> problem resurfaced. >> - Are the "Unknown symbol"s still there? These are not supposed to >> happen. > No. (See explanation above). >> - Is the "WARNING: at arch/x86/mm/ioremap.c" still there? > No. I couldn't reproduce this warning, yet. > >> - Can you reproduce it without the atheros driver? > Yes. > > See http://bugzilla.kernel.org/show_bug.cgi?id=10080. Thanks. Summary from today's bugzilla comments: No ioremap warning, but MMIO reads still give bogus values and let ohci1394 fail. ohci1394 still got the MMIO region 0x1'0000'0000 - 0x1'0000'07ff, FWIW. The length of the region is correct, but its contents bogus. -- Stefan Richter -=====-==--- --== =-==- http://arcgraph.de/sr/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/