libertas: convert to internal net_device_stats

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/libertas/wext.c b/drivers/net/wireless/libertas/wext.c
index f16d136..8bc19074 100644
--- a/drivers/net/wireless/libertas/wext.c
+++ b/drivers/net/wireless/libertas/wext.c
@@ -830,7 +830,7 @@
 	quality = rssi_qual;
 
 	/* Quality by TX errors */
-	priv->wstats.discard.retries = priv->stats.tx_errors;
+	priv->wstats.discard.retries = dev->stats.tx_errors;
 
 	memset(&log, 0, sizeof(log));
 	log.hdr.size = cpu_to_le16(sizeof(log));