From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753910Ab1GHIIQ (ORCPT ); Fri, 8 Jul 2011 04:08:16 -0400 Received: from caramon.arm.linux.org.uk ([78.32.30.218]:49747 "EHLO caramon.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751856Ab1GHIIL (ORCPT ); Fri, 8 Jul 2011 04:08:11 -0400 Date: Fri, 8 Jul 2011 09:07:51 +0100 From: Russell King To: Qin Dehua Cc: Dan Williams , linux-kernel@vger.kernel.org, santosh.shilimkar@ti.com, neilb@suse.de Subject: Re: PROBLEM: ARM-dma-mapping-fix-for-speculative-prefetching cause OOPS Message-ID: <20110708080751.GA14947@flint.arm.linux.org.uk> References: <20110630074301.GC27959@flint.arm.linux.org.uk> <20110630112804.GA21481@flint.arm.linux.org.uk> <20110707093928.GA15325@flint.arm.linux.org.uk> 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) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 08, 2011 at 12:38:38PM +0800, Qin Dehua wrote: > After doing the above changes, the kernel just report BUG_ON(dir == > DMA_BIDIRECTIONAL): That's really unfortunate. The only other thing I can think which may help is to enable all the raid5, async_tx and dmaengine debug code. And I hope you have DMA_API_DEBUG enabled in your .config ? -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: