net: korina: optimize rx descriptor flags processing

Signed-off-by: Roman Yeryomin <roman@advem.lv>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/korina.c

@@ -363,11 +363,18 @@ static int korina_rx(struct net_device *dev, int limit)
 		if ((KORINA_RBSIZE - (u32)DMA_COUNT(rd->control)) == 0)
 			break;
 
+		/* check that this is a whole packet
+		 * WARNING: DMA_FD bit incorrectly set
+		 * in Rc32434 (errata ref #077) */
+		if (!(devcs & ETH_RX_LD))
+			goto next;
+
+		if (!(devcs & ETH_RX_ROK)) {
 			/* Update statistics counters */
+			dev->stats.rx_errors++;
+			dev->stats.rx_dropped++;
 			if (devcs & ETH_RX_CRC)
 				dev->stats.rx_crc_errors++;
-		if (devcs & ETH_RX_LOR)
-			dev->stats.rx_length_errors++;
 			if (devcs & ETH_RX_LE)
 				dev->stats.rx_length_errors++;
 			if (devcs & ETH_RX_OVR)
@@ -375,17 +382,11 @@ static int korina_rx(struct net_device *dev, int limit)
 			if (devcs & ETH_RX_CV)
 				dev->stats.rx_frame_errors++;
 			if (devcs & ETH_RX_CES)
-			dev->stats.rx_length_errors++;
-		if (devcs & ETH_RX_MP)
-			dev->stats.multicast++;
+				dev->stats.rx_frame_errors++;
+
+			goto next;
+		}
 
-		if ((devcs & ETH_RX_LD) != ETH_RX_LD) {
-			/* check that this is a whole packet
-			 * WARNING: DMA_FD bit incorrectly set
-			 * in Rc32434 (errata ref #077) */
-			dev->stats.rx_errors++;
-			dev->stats.rx_dropped++;
-		} else if ((devcs & ETH_RX_ROK)) {
 		pkt_len = RCVPKT_LENGTH(devcs);
 
 		/* must be the (first and) last
@@ -414,8 +415,8 @@ static int korina_rx(struct net_device *dev, int limit)
 			dev->stats.multicast++;
 
 		lp->rx_skb[lp->rx_next_done] = skb_new;
-		}
 
+next:
 		rd->devcs = 0;
 
 		/* Restore descriptor's curr_addr */