vlan: unnecessary to check if vlan_pcpu_stats is NULL

if allocating memory for vlan_pcpu_stats failed, the device can not be operated

Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/8021q/vlan_dev.c

@@ -706,38 +706,36 @@ static void vlan_ethtool_get_drvinfo(struct net_device *dev,
 
 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
 {
+	struct vlan_pcpu_stats *p;
+	u32 rx_errors = 0, tx_dropped = 0;
+	int i;
 
-	if (vlan_dev_priv(dev)->vlan_pcpu_stats) {
-		struct vlan_pcpu_stats *p;
-		u32 rx_errors = 0, tx_dropped = 0;
-		int i;
+	for_each_possible_cpu(i) {
+		u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
+		unsigned int start;
 
-		for_each_possible_cpu(i) {
-			u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
-			unsigned int start;
+		p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
+		do {
+			start = u64_stats_fetch_begin_irq(&p->syncp);
+			rxpackets	= p->rx_packets;
+			rxbytes		= p->rx_bytes;
+			rxmulticast	= p->rx_multicast;
+			txpackets	= p->tx_packets;
+			txbytes		= p->tx_bytes;
+		} while (u64_stats_fetch_retry_irq(&p->syncp, start));
 
-			p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
-			do {
-				start = u64_stats_fetch_begin_irq(&p->syncp);
-				rxpackets	= p->rx_packets;
-				rxbytes		= p->rx_bytes;
-				rxmulticast	= p->rx_multicast;
-				txpackets	= p->tx_packets;
-				txbytes		= p->tx_bytes;
-			} while (u64_stats_fetch_retry_irq(&p->syncp, start));
-
-			stats->rx_packets	+= rxpackets;
-			stats->rx_bytes		+= rxbytes;
-			stats->multicast	+= rxmulticast;
-			stats->tx_packets	+= txpackets;
-			stats->tx_bytes		+= txbytes;
-			/* rx_errors & tx_dropped are u32 */
-			rx_errors	+= p->rx_errors;
-			tx_dropped	+= p->tx_dropped;
-		}
-		stats->rx_errors  = rx_errors;
-		stats->tx_dropped = tx_dropped;
+		stats->rx_packets	+= rxpackets;
+		stats->rx_bytes		+= rxbytes;
+		stats->multicast	+= rxmulticast;
+		stats->tx_packets	+= txpackets;
+		stats->tx_bytes		+= txbytes;
+		/* rx_errors & tx_dropped are u32 */
+		rx_errors	+= p->rx_errors;
+		tx_dropped	+= p->tx_dropped;
 	}
+	stats->rx_errors  = rx_errors;
+	stats->tx_dropped = tx_dropped;
+
 	return stats;
 }