From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from oss.sgi.com (localhost [127.0.0.1]) by oss.sgi.com (8.12.5/8.12.5) with ESMTP id g6B88VRw016464 for ; Thu, 11 Jul 2002 01:08:31 -0700 Received: (from majordomo@localhost) by oss.sgi.com (8.12.5/8.12.3/Submit) id g6B88VaM016463 for linux-mips-outgoing; Thu, 11 Jul 2002 01:08:31 -0700 X-Authentication-Warning: oss.sgi.com: majordomo set sender to owner-linux-mips@oss.sgi.com using -f Received: from elvis.franken.de (mail@dns.franken.de [193.175.24.33]) by oss.sgi.com (8.12.5/8.12.5) with SMTP id g6B88NRw016454; Thu, 11 Jul 2002 01:08:24 -0700 Received: from tsbogend by elvis.franken.de with local (Exim 3.22 #1) id 17SZ47-0003wd-00; Thu, 11 Jul 2002 10:12:43 +0200 Date: Thu, 11 Jul 2002 10:12:43 +0200 From: Thomas Bogendoerfer To: Alan Cox Cc: Jun Sun , linux-mips@oss.sgi.com, Ralf Baechle , marcelo@conectiva.com.br Subject: Re: [2.4 PATCH] pcnet32.c - tx underflow error Message-ID: <20020711081243.GA14912@elvis.franken.de> Reply-To: tsbogend@alpha.franken.de References: <3D2CCC83.6090304@mvista.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.3.25i X-Spam-Status: No, hits=-4.4 required=5.0 tests=IN_REP_TO version=2.20 X-Spam-Level: Sender: owner-linux-mips@oss.sgi.com Precedence: bulk On Thu, Jul 11, 2002 at 03:16:03AM +0100, Alan Cox wrote: > > I even suspect this is the default setting on PCI cards on PC. Can someone > > verify? If that is the case, that will explain why driver never sets this > > bit. Maybe we don't have any "real computers" after all. :-) > > Most PC hardware can deliver that kind of DMA guarantee. UDMA100 doesn't > work very well otherwise. I've seen this problem on a lot of PC hardware, too. The best fix would be to enable full packet mode, when the driver sees too much TX underruns. Thomas.