From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Hancock Subject: Re: sata_sil24 0000:04:00.0: DMA-API: device driver frees DMA sg list with different entry count [map count=13] [unmap count=10] Date: Wed, 03 Jun 2009 17:33:21 -0600 Message-ID: <4A270841.7070107@gmail.com> References: <64bb37e0905261214g2957924ar837339367f320d4c@mail.gmail.com> <4A1C7DDB.9010605@gmail.com> <64bb37e0906031230m22234268k9fdcd43dc1d35f18@mail.gmail.com> <1244060503.11698.3.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from yw-out-2324.google.com ([74.125.46.29]:6978 "EHLO yw-out-2324.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752239AbZFCXdX (ORCPT ); Wed, 3 Jun 2009 19:33:23 -0400 In-Reply-To: <1244060503.11698.3.camel@localhost> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Kasper Sandberg Cc: Torsten Kaiser , Linux Kernel Mailing List , SCSI development list Kasper Sandberg wrote: > On Wed, 2009-06-03 at 21:30 +0200, Torsten Kaiser wrote: >> On Wed, May 27, 2009 at 1:40 AM, Robert Hancock wrote: >>> Torsten Kaiser wrote: >>>> On upgrading to 2.6.30-rc1 I enable the DMA-Debugging option >>>> CONFIG_DMA_API_DEBUG=y >>>> Since then I get the following or similar errors on each boot: >>> Please retest with a newer -rc, this patch likely fixes it: >>> >>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5825627c9463581fd9e70f8285685889ae5bb9bb >>> >> Still happens with 2.6.30-rc8 (see trace at the end of the email) >> > > > Does this actually give you any problems? should I be scared to give .30 > a test? If Torsten's diagnosis is correct it's a problem with the DMA debugging code, not an actual driver bug.