From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [PATCH] Re: 2.6.19.1, sata_sil: sata dvd writer doesn't work Date: Tue, 08 May 2007 16:52:52 +0200 Message-ID: <46408EC4.9080904@gmail.com> References: <46362672.7080103@gmx.net> <4636DCA9.9050803@gmail.com> <4636FBB7.3030605@gmx.net> <463AE631.9030701@gmail.com> <463B7903.4070206@gmx.net> <463EE239.8060709@gmail.com> <463F634E.2070103@gmx.net> <46408C4B.8020401@gmail.com> <20070508155119.4207bbc6@the-village.bc.nu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from wx-out-0506.google.com ([66.249.82.233]:28981 "EHLO wx-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S968055AbXEHOxD (ORCPT ); Tue, 8 May 2007 10:53:03 -0400 Received: by wx-out-0506.google.com with SMTP id h31so1748854wxd for ; Tue, 08 May 2007 07:53:02 -0700 (PDT) In-Reply-To: <20070508155119.4207bbc6@the-village.bc.nu> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Alan Cox Cc: Daniel Beichl , linux-ide@vger.kernel.org Alan Cox wrote: >>> A thing that crossed my mind was a timing issue. Perhaps the dmaing of < >>> 60 bytes is that >>> fast that the interrupt that causes it is not yet handled correctly. But >>> this is just a very wild guess. >> I don't think that can happen. Controllers are required to queue >> interrupt till FIFO is flushed. Can you post dmesg after such errors? > > Random finger in the air guess - the FIFO on the SIL DMA engine is 64 > bytes long ? Perhaps this is something Jeff can query with his contacts > at Silicon Image ? That sounds plausible. I have pretty good relationship with SIMG. I'll ask them. Thanks. -- tejun