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 g6B0BmRw025284 for ; Wed, 10 Jul 2002 17:11:48 -0700 Received: (from majordomo@localhost) by oss.sgi.com (8.12.5/8.12.3/Submit) id g6B0BmMf025282 for linux-mips-outgoing; Wed, 10 Jul 2002 17:11:48 -0700 X-Authentication-Warning: oss.sgi.com: majordomo set sender to owner-linux-mips@oss.sgi.com using -f Received: from av.mvista.com (gateway-1237.mvista.com [12.44.186.158]) by oss.sgi.com (8.12.5/8.12.5) with SMTP id g6B0BfRw025233; Wed, 10 Jul 2002 17:11:41 -0700 Received: from mvista.com (av [127.0.0.1]) by av.mvista.com (8.9.3/8.9.3) with ESMTP id RAA25088; Wed, 10 Jul 2002 17:15:58 -0700 Message-ID: <3D2CCC83.6090304@mvista.com> Date: Wed, 10 Jul 2002 17:08:35 -0700 From: Jun Sun User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.2.1) Gecko/20010901 X-Accept-Language: en-us MIME-Version: 1.0 To: Alan Cox CC: linux-mips@oss.sgi.com, Ralf Baechle , marcelo@conectiva.com.br Subject: Re: [2.4 PATCH] pcnet32.c - tx underflow error References: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, hits=0.0 required=5.0 tests= version=2.20 X-Spam-Level: Sender: owner-linux-mips@oss.sgi.com Precedence: bulk Alan Cox wrote: >>This patch fixes a tx underflow error for 79c973 chip. It essentially delay >>the transmission until the whole packet is received into the on-chip sdram. >> >>The patch is already accepted by Marcelo for the 2.4 tree, I think. >> > > Which slows the stuff down for people with real computers. BTW, I have seen this problem on four boards (including Malta, two NEC boards and a Hitachi board). Not surprisingly the problem mostly happens when you connect to 100Mb/s network. 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. :-) Jun