From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH v2] gianfar: Fall back to software tcp/udp checksum on older controllers Date: Fri, 18 Mar 2011 15:15:09 -0700 (PDT) Message-ID: <20110318.151509.241430327.davem@davemloft.net> References: <598461.73809.qm@web37603.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: linux-kernel@vger.kernel.org, galak@kernel.crashing.org, cbouatmailru@gmail.com, mlcreech@gmail.com, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org To: oakad@yahoo.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:43740 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932338Ab1CRWOb (ORCPT ); Fri, 18 Mar 2011 18:14:31 -0400 In-Reply-To: <598461.73809.qm@web37603.mail.mud.yahoo.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Alex Dubov Date: Wed, 16 Mar 2011 20:57:13 -0700 (PDT) > As specified by errata eTSEC49 of MPC8548 and errata eTSEC12 of MPC83xx, > older revisions of gianfar controllers will be unable to calculate a TCP/UDP > packet checksum for some alignments of the appropriate FCB. This patch checks > for FCB alignment on such controllers and falls back to software checksumming > if the alignment is known to be bad. > > Signed-off-by: Alex Dubov Applied.