From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756797AbZEFGmk (ORCPT ); Wed, 6 May 2009 02:42:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752023AbZEFGm3 (ORCPT ); Wed, 6 May 2009 02:42:29 -0400 Received: from kroah.org ([198.145.64.141]:46911 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751020AbZEFGm2 (ORCPT ); Wed, 6 May 2009 02:42:28 -0400 Date: Tue, 5 May 2009 22:21:20 -0700 From: Greg KH To: FUJITA Tomonori Cc: eric.valette@free.fr, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Subject: Re: DMA debug trace pointing to rtl8187 Message-ID: <20090506052120.GA6239@kroah.com> References: <49FDB9F8.3080400@free.fr> <20090506133131F.fujita.tomonori@lab.ntt.co.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090506133131F.fujita.tomonori@lab.ntt.co.jp> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 06, 2009 at 01:30:47PM +0900, FUJITA Tomonori wrote: > CC'ed linux-usb, > > The ehci_hcd driver uses buffers on the stack for DMA? No, it should not. But USB drivers are known to do this incorrectly. Those USB drivers should be fixed. > On Sun, 03 May 2009 17:36:24 +0200 > Eric Valette wrote: > > > ------------[ cut here ]------------ > > > > WARNING: at /usr/src/linux-2.6.22.9/lib/dma-debug.c:609 > > Hmm, the kernel version is wired. lib/dma-debug.c was added in > 2.6.30-rc. Very odd. What specific kernel version caused this warning? thanks, greg k-h