netdev - [PATCH] Davinci: Do not reset EMAC TX overruns counter on read

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Message-ID: <4D77918C.9050800@corelatus.se>
Date:	Wed, 09 Mar 2011 15:41:16 +0100
From:	Thomas Lange <thomas@...elatus.se>
To:	netdev@...r.kernel.org
CC:	"davinci-linux-open-source@...ux.davincidsp.com" 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	davem@...emloft.net, anantgole@...com, chaithrika@...com
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@...elatus.se>
---
  drivers/net/davinci_emac.c |    2 +-
  1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 2a628d1..922c8c5 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;
-- 
1.7.2.5

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