commit 60aeba23101f34a690a0b0a048ffde3d023d4f3b
author Thomas Lange <thomas@corelatus.se> Wed Mar 09 04:41:16 2011 +0000
committer David S. Miller <davem@davemloft.net> Mon Mar 14 15:04:50 2011 -0700
tree bff2e733d6bc1e6b51799018df683e89bf8b29f0
parent 0b32211164da2b100553cb45e4e862f09c5cab11

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

diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 7018bfe..082d6ea 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -1730,7 +1730,7 @@
 		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;