Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261336AbVA1AQh (ORCPT ); Thu, 27 Jan 2005 19:16:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261345AbVA1APS (ORCPT ); Thu, 27 Jan 2005 19:15:18 -0500 Received: from caramon.arm.linux.org.uk ([212.18.232.186]:3346 "EHLO caramon.arm.linux.org.uk") by vger.kernel.org with ESMTP id S261335AbVA1AOm (ORCPT ); Thu, 27 Jan 2005 19:14:42 -0500 Date: Fri, 28 Jan 2005 00:14:30 +0000 From: Russell King To: "David S. Miller" Cc: jgarzik@pobox.com, linux-kernel@vger.kernel.org, netdev@oss.sgi.com, greg@kroah.com, akpm@osdl.org Subject: Re: [ANN] removal of certain net drivers coming soon: eepro100, xircom_tulip_cb, iph5526 Message-ID: <20050128001430.C22695@flint.arm.linux.org.uk> Mail-Followup-To: "David S. Miller" , jgarzik@pobox.com, linux-kernel@vger.kernel.org, netdev@oss.sgi.com, greg@kroah.com, akpm@osdl.org References: <41F952F4.7040804@pobox.com> <20050127225725.F3036@flint.arm.linux.org.uk> <20050127153114.72be03e2.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <20050127153114.72be03e2.davem@davemloft.net>; from davem@davemloft.net on Thu, Jan 27, 2005 at 03:31:14PM -0800 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1192 Lines: 25 On Thu, Jan 27, 2005 at 03:31:14PM -0800, David S. Miller wrote: > Therefore the only missing sync would be of the new RX descriptor > when linking things in like that, ie. at the end of e100_rx_alloc_skb() > if rx->prev->skb is non-NULL. And that is inherently unsafe, since the chip may be modifying the RFD while the CPU is accessing it. Adding extra sync calls does not fix it because as far as I can see, there's nothing to tell the chip "don't write to this RFD because any changes the CPU is making right now will overwrite the chips own changes." The fact of the matter is that eepro100.c works on ARM, e100.c doesn't. There's a message from me back on 30th June 2004 at about 10:30 BST on this very list which generated almost no interest from anyone... -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 PCMCIA - http://pcmcia.arm.linux.org.uk/ 2.6 Serial core - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/