From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754779AbYJCKCl (ORCPT ); Fri, 3 Oct 2008 06:02:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753239AbYJCKCd (ORCPT ); Fri, 3 Oct 2008 06:02:33 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:40267 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753234AbYJCKCd (ORCPT ); Fri, 3 Oct 2008 06:02:33 -0400 Date: Fri, 3 Oct 2008 12:02:11 +0200 From: Ingo Molnar To: Steven Noonan Cc: linux-kernel@vger.kernel.org, ath9k-devel@venema.h4ckr.net, lrodriguez@atheros.com Subject: Re: ath9k: panic on tip/master Message-ID: <20081003100211.GA29841@elte.hu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0041] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Steven Noonan wrote: > Hey folks, > > Just got a panic on tip. According to the stack trace, ath9k is what > decided to bomb. > > http://www.uplinklabs.net/~tycho/linux/ath9k_panic_tip_10.3.2008.jpg > > Note: Although it says 'sudo modprobe radeon' on the bash prompt above > the panic, I never got to hit 'enter' on that command before the panic > occurred. it appears to me that ath9k's eth_rx_input() takes a spinlock that is not initialized (or already destroyed by the allocator). this would be consistent with an IRQ storm hitting some race in the ath9k driver init sequence. For example if request_irq() is done before all structures that the IRQ handler relies on are properly initialized. i.e. this has the signature of a genuine ath9k bug. Ingo