Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261938AbTKGXHm (ORCPT ); Fri, 7 Nov 2003 18:07:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261930AbTKGWXm (ORCPT ); Fri, 7 Nov 2003 17:23:42 -0500 Received: from fmr04.intel.com ([143.183.121.6]:56036 "EHLO caduceus.sc.intel.com") by vger.kernel.org with ESMTP id S264072AbTKGLDn (ORCPT ); Fri, 7 Nov 2003 06:03:43 -0500 Subject: Re: Shared ACPI/USB IRQ working in 2.6 but not in 2.4 From: Len Brown To: Marcelo Tosatti Cc: linux-kernel@vger.kernel.org, Greg KH , David van Hoose In-Reply-To: References: Content-Type: text/plain Organization: Message-Id: <1068203016.2684.976.camel@dhcppc4> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.3 Date: 07 Nov 2003 06:03:36 -0500 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1668 Lines: 53 The details of this issue are here: http://bugzilla.kernel.org/show_bug.cgi?id=1283 Looks like the IOAPIC is in a different state in 2.4 and 2.6 before ACPI programs it. Also 2.6 has sis_apic_bug code that 2.4 does not -- though I don't know yet if it actually runs on this box. cheers, -Len On Thu, 2003-11-06 at 07:05, Marcelo Tosatti wrote: > Hi, > > David van Hoose started having problems with USB on 2.4.23-pre5. USB > device and acpi were now using irq 20: > > host/usb-ohci.c: USB OHCI at membase 0xe081a000, IRQ 20 > > /proc/interrupts: > > 20: 1 IO-APIC-level acpi, usb-ohci > > > Which makes the USB device not work. > > With -pre4 the USB device was using interrupt 9, because acpi failed to > find the correct IRQ: > > pci_irq-0302 [18] acpi_pci_irq_derive : Unable to derive IRQ for device 00:03.0 > PCI: No IRQ known for interrupt pin A of device 00:03.0 > host/usb-ohci.c: USB OHCI at membase 0xe081a000, IRQ 9 > > Now 2.6 assigns interrupt 20 to acpi and usb-ohci just like in > 2.4.23-pre5+, but the USB device works! > > Anyone has an idea why the interrupt sharing works with 2.6 but not with > 2.4? > > > > > - > 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/ - 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/