qlcnic: Fix ethtool statistics collection

o Properly fill statistics data into buffer.
  Update buffer pointer properly after filling statistics data into buffer.
Signed-off-by: NShahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c

@@ -1071,8 +1071,7 @@ qlcnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
 	}
 }
 
-static void
-qlcnic_fill_stats(u64 *data, void *stats, int type)
+static u64 *qlcnic_fill_stats(u64 *data, void *stats, int type)
 {
 	if (type == QLCNIC_MAC_STATS) {
 		struct qlcnic_mac_statistics *mac_stats =
@@ -1121,6 +1120,7 @@ qlcnic_fill_stats(u64 *data, void *stats, int type)
 		*data++ = QLCNIC_FILL_STATS(esw_stats->local_frames);
 		*data++ = QLCNIC_FILL_STATS(esw_stats->numbytes);
 	}
+	return data;
 }
 
 static void qlcnic_get_ethtool_stats(struct net_device *dev,
@@ -1148,7 +1148,7 @@ static void qlcnic_get_ethtool_stats(struct net_device *dev,
 		/* Retrieve MAC statistics from firmware */
 		memset(&mac_stats, 0, sizeof(struct qlcnic_mac_statistics));
 		qlcnic_get_mac_stats(adapter, &mac_stats);
-		qlcnic_fill_stats(data, &mac_stats, QLCNIC_MAC_STATS);
+		data = qlcnic_fill_stats(data, &mac_stats, QLCNIC_MAC_STATS);
 	}
 
 	if (!(adapter->flags & QLCNIC_ESWITCH_ENABLED))
@@ -1160,7 +1160,7 @@ static void qlcnic_get_ethtool_stats(struct net_device *dev,
 	if (ret)
 		return;
 
-	qlcnic_fill_stats(data, &port_stats.rx, QLCNIC_ESW_STATS);
+	data = qlcnic_fill_stats(data, &port_stats.rx, QLCNIC_ESW_STATS);
 	ret = qlcnic_get_port_stats(adapter, adapter->ahw->pci_func,
 			QLCNIC_QUERY_TX_COUNTER, &port_stats.tx);
 	if (ret)