[PATCH] fs_enet: Adjust BDs after tx error
davem at davemloft.net
Sat May 29 17:16:36 EST 2010
From: Mark Ware <mware at elphinstone.net>
Date: Thu, 27 May 2010 11:12:12 +1000
> This patch fixes an occasional transmit lockup in the mac-fcc which
> occurs after a tx error. The test scenario had the local port set
> to autoneg and the other end fixed at 100FD, resulting in a large
> number of late collisions.
> According to the MPC8280RM 220.127.116.11 (also 8272RM 18.104.22.168), after
> a tx error occurs, TBPTR may sometimes point beyond BDs still marked
> as ready. This patch walks back through the BDs and points TBPTR to
> the earliest one marked as ready.
> Tested on a custom board with a MPC8280.
> Signed-off-by: Mark Ware <mware at elphinstone.net>
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