Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1162270AbWKPE2Z (ORCPT ); Wed, 15 Nov 2006 23:28:25 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1162272AbWKPE2Z (ORCPT ); Wed, 15 Nov 2006 23:28:25 -0500 Received: from outbound-ash.frontbridge.com ([206.16.192.249]:45538 "EHLO outbound2-ash-R.bigfish.com") by vger.kernel.org with ESMTP id S1162270AbWKPE2Y convert rfc822-to-8bit (ORCPT ); Wed, 15 Nov 2006 23:28:24 -0500 X-BigFish: VP X-Server-Uuid: 89466532-923C-4A88-82C1-66ACAA0041DF X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Subject: RE: [PATCH] ALSA: hda-intel - Disable MSI support by default Date: Wed, 15 Nov 2006 20:25:01 -0800 Message-ID: <5986589C150B2F49A46483AC44C7BCA4907209@ssvlexmb2.amd.com> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [PATCH] ALSA: hda-intel - Disable MSI support by default Thread-Index: AccI+G+74GXGy7WIQ3ad7MeRPzzpxAAG1HgwAAeB11AAAR5gUA== From: "Lu, Yinghai" To: "Lu, Yinghai" , "Olivier Nicolas" , "Linus Torvalds" cc: "Mws" , "Jeff Garzik" , "Krzysztof Halasa" , "David Miller" , linux-kernel@vger.kernel.org, tiwai@suse.de X-OriginalArrivalTime: 16 Nov 2006 04:25:02.0825 (UTC) FILETIME=[2F820590:01C70937] X-WSS-ID: 694537941WC498782-01-01 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 543 Lines: 17 I think the root cause in hda_intel driver's self. It gets io-apic irq initialized at first, and it will use azx_acquire_irq to install handler after check if MSI can be enabled. And when it try to enable the MSI, that will start the int in the chip. Even handler for MSI is not installed. YH - 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/