netdev - Re: [PATCH 2/5] netdev: bfin_mac: fix malformed UDP packet transmission when polling with KGDB

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Message-Id: <20090529.042726.135473158.davem@davemloft.net>
Date:	Fri, 29 May 2009 04:27:26 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	vapier.adi@...il.com
Cc:	netdev@...r.kernel.org, uclinux-dist-devel@...ckfin.uclinux.org,
	sonic.zhang@...log.com, cooloney@...nel.org
Subject: Re: [PATCH 2/5] netdev: bfin_mac: fix malformed UDP packet
 transmission when polling with KGDB

From: Mike Frysinger <vapier.adi@...il.com>
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".
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