From 60aeba23101f34a690a0b0a048ffde3d023d4f3b Mon Sep 17 00:00:00 2001
From: Thomas Lange <thomas@corelatus.se>
Date: Wed, 9 Mar 2011 04:41:16 +0000
Subject: [PATCH] Davinci: Do not reset EMAC TX overruns counter on read

Don't reset tx_fifo_errors when reading out current EMAC stats.
  (tx_fifo_errors shows up as TX overruns in netdev stats.)

Without this correction, the old counter value is lost every time
stats are read out.

Signed-off-by: Thomas Lange <thomas@corelatus.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/davinci_emac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 7018bfe408a4..082d6ea69920 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -1730,7 +1730,7 @@ static struct net_device_stats *emac_dev_getnetstats(struct net_device *ndev)
 		emac_read(EMAC_TXCARRIERSENSE);
 	emac_write(EMAC_TXCARRIERSENSE, stats_clear_mask);
 
-	ndev->stats.tx_fifo_errors = emac_read(EMAC_TXUNDERRUN);
+	ndev->stats.tx_fifo_errors += emac_read(EMAC_TXUNDERRUN);
 	emac_write(EMAC_TXUNDERRUN, stats_clear_mask);
 
 	return &ndev->stats;
-- 
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