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Date: Wed, 27 May 2009 02:10:12 -0400 From: Mike Frysinger <vapier@...too.org> To: netdev@...r.kernel.org Cc: uclinux-dist-devel@...ckfin.uclinux.org, Sonic Zhang <sonic.zhang@...log.com>, Mike Frysinger <vapier.adi@...il.com>, Bryan Wu <cooloney@...nel.org> Subject: [PATCH 2/5] netdev: bfin_mac: fix malformed UDP packet transmission when polling with KGDB From: Sonic Zhang <sonic.zhang@...log.com> Make sure data is really written into the registers before enabling DMA. Otherwise, the EMAC DMA controller may transfer out a malformed packet. This patch may also fix netperf bugs or scp bugs. Signed-off-by: Sonic Zhang <sonic.zhang@...log.com> Signed-off-by: Mike Frysinger <vapier.adi@...il.com> Signed-off-by: Bryan Wu <cooloney@...nel.org> --- drivers/net/bfin_mac.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c index 1905532..626715c 100644 --- a/drivers/net/bfin_mac.c +++ b/drivers/net/bfin_mac.c @@ -688,6 +688,9 @@ static int bfin_mac_hard_start_xmit(struct sk_buff *skb, } } + /* Make sure data is really written into registers before enabling DMA */ + SSYNC(); + /* enable this packet's dma */ current_tx_ptr->desc_a.config |= DMAEN; -- 1.6.3.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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