From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH 2/5] netdev: bfin_mac: fix malformed UDP packet transmission when polling with KGDB Date: Fri, 29 May 2009 04:27:26 -0700 (PDT) Message-ID: <20090529.042726.135473158.davem@davemloft.net> References: <8bd0f97a0905290346v542e83cdg321241f0b4d95d9e@mail.gmail.com> <20090529.035224.124353374.davem@davemloft.net> <8bd0f97a0905290420g454c3affr21b6f05e5971d93@mail.gmail.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, uclinux-dist-devel@blackfin.uclinux.org, sonic.zhang@analog.com, cooloney@kernel.org To: vapier.adi@gmail.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:49886 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752664AbZE2L10 (ORCPT ); Fri, 29 May 2009 07:27:26 -0400 In-Reply-To: <8bd0f97a0905290420g454c3affr21b6f05e5971d93@mail.gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Mike Frysinger Date: Fri, 29 May 2009 07:20:18 -0400 > that isnt how the DMA is being used here. there is no register to > read back because the DMA controller is doing the reading indirectly. > but along those lines, it's not entirely clear which DMA registers > this SSYNC is supposed to be protecting because all of the updates are > happening on the descriptors in external memory, not the DMA registers > themselves. i'll have Sonic clarify. Yes, that's really confusing because the commit message says "registers".