Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755871AbZGGTvV (ORCPT ); Tue, 7 Jul 2009 15:51:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755226AbZGGTvM (ORCPT ); Tue, 7 Jul 2009 15:51:12 -0400 Received: from mx-out.daemonmail.net ([216.104.160.38]:53321 "EHLO mx-out.daemonmail.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752125AbZGGTvL (ORCPT ); Tue, 7 Jul 2009 15:51:11 -0400 From: "Michael S. Zick" Reply-To: lkml@morethan.org To: Alan Stern Subject: Re: Null Pointer BUG in uhci_hcd Date: Tue, 7 Jul 2009 14:51:04 -0500 User-Agent: KMail/1.9.9 Cc: Oliver Neukum , Jiri Kosina , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200907071451.08164.lkml@morethan.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2075 Lines: 58 On Tue July 7 2009, Alan Stern wrote: > On Tue, 7 Jul 2009, Michael S. Zick wrote: > > > On Tue July 7 2009, Alan Stern wrote: > > > On Tue, 7 Jul 2009, Michael S. Zick wrote: > > > > > > > > It looks like there's a serious problem in your UHCI hardware. > > > > > According to the log you posted, it's not working at all. > > > > > > > > > > > > > I am using the x86-generic drivers - - > > > > > > Not a problem with the drivers, a problem in the hardware. > > > > > > > Or hardware that works as the manufacturer intended, but differently > > than expected. Same difference as "broken" when compared to "standard". > > No, hardware that doesn't work at all. As in "all reads return > 0xffffffff" -- that's just a guess but something like it would account > for what you saw. > > For more information enable CONFIG_USB_DEBUG and CONFIG_DEBUG_FS, then > see what's sitting in the usb/uhci/* files in debugfs. > Will add that to my list - - I need to do that to find/fix that error path message flood loop in ehci anyway. Mike > > Let me see if I can find it again; > > 1106:3038 translates to: PCI_DEVICE_ID_VIA_82C586_2 > > 1106:3104 translates to: PCI_DEVICE_ID_VIA_8235_USB_2 > > > > The first appears in (this device is the UHCI hub in the CX700 chipset): > > arch/powerpc/platforms/85xx/mpc85xx_cds.c: case PCI_DEVICE_ID_VIA_82C586_2: > > arch/mips/pci/fixup-lm2e.c:DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_2, > > include/linux/pci_ids.h:#define PCI_DEVICE_ID_VIA_82C586_2 0x3038 > > Those are simple interrupt routing fixups. Not related. > > > The second appears in: > > include/linux/pci_ids.h:#define PCI_DEVICE_ID_VIA_8235_USB_2 0x3104 > > > > Probably never used. > > Alan Stern > > > -- 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/