diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 26e9db8c1b954fa07a20f42956d2ada3efce7570..5782511c9459c2ef2e1b830d477a21a79f58e541 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -4804,7 +4804,8 @@ static irqreturn_t tg3_msi_1shot(int irq, void *dev_id)
 	struct tg3 *tp = tnapi->tp;
 
 	prefetch(tnapi->hw_status);
-	prefetch(&tnapi->rx_rcb[tnapi->rx_rcb_ptr]);
+	if (tnapi->rx_rcb)
+		prefetch(&tnapi->rx_rcb[tnapi->rx_rcb_ptr]);
 
 	if (likely(!tg3_irq_sync(tp)))
 		napi_schedule(&tnapi->napi);
@@ -4822,7 +4823,8 @@ static irqreturn_t tg3_msi(int irq, void *dev_id)
 	struct tg3 *tp = tnapi->tp;
 
 	prefetch(tnapi->hw_status);
-	prefetch(&tnapi->rx_rcb[tnapi->rx_rcb_ptr]);
+	if (tnapi->rx_rcb)
+		prefetch(&tnapi->rx_rcb[tnapi->rx_rcb_ptr]);
 	/*
 	 * Writing any value to intr-mbox-0 clears PCI INTA# and
 	 * chip-internal interrupt pending events.
@@ -5765,6 +5767,9 @@ static void tg3_free_rings(struct tg3 *tp)
 	for (j = 0; j < tp->irq_cnt; j++) {
 		struct tg3_napi *tnapi = &tp->napi[j];
 
+		if (!tnapi->tx_buffers)
+			continue;
+
 		for (i = 0; i < TG3_TX_RING_SIZE; ) {
 			struct tx_ring_info *txp;
 			struct sk_buff *skb;
@@ -5815,10 +5820,12 @@ static int tg3_init_rings(struct tg3 *tp)
 
 		tnapi->tx_prod = 0;
 		tnapi->tx_cons = 0;
-		memset(tnapi->tx_ring, 0, TG3_TX_RING_BYTES);
+		if (tnapi->tx_ring)
+			memset(tnapi->tx_ring, 0, TG3_TX_RING_BYTES);
 
 		tnapi->rx_rcb_ptr = 0;
-		memset(tnapi->rx_rcb, 0, TG3_RX_RCB_RING_BYTES(tp));
+		if (tnapi->rx_rcb)
+			memset(tnapi->rx_rcb, 0, TG3_RX_RCB_RING_BYTES(tp));
 	}
 
 	return tg3_rx_prodring_alloc(tp, &tp->prodring[0]);
@@ -5898,6 +5905,13 @@ static int tg3_alloc_consistent(struct tg3 *tp)
 
 		memset(tnapi->hw_status, 0, TG3_HW_STATUS_SIZE);
 
+		/*
+		 * If multivector RSS is enabled, vector 0 does not handle
+		 * rx or tx interrupts.  Don't allocate any resources for it.
+		 */
+		if (!i && (tp->tg3_flags3 & TG3_FLG3_ENABLE_RSS))
+			continue;
+
 		tnapi->rx_rcb = pci_alloc_consistent(tp->pdev,
 						     TG3_RX_RCB_RING_BYTES(tp),
 						     &tnapi->rx_rcb_mapping);
@@ -10166,8 +10180,13 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
 	struct tg3_napi *tnapi, *rnapi;
 	struct tg3_rx_prodring_set *tpr = &tp->prodring[0];
 
-	tnapi = &tp->napi[0];
-	rnapi = &tp->napi[0];
+	if (tp->irq_cnt > 1) {
+		tnapi = &tp->napi[1];
+		rnapi = &tp->napi[1];
+	} else {
+		tnapi = &tp->napi[0];
+		rnapi = &tp->napi[0];
+	}
 	coal_now = tnapi->coal_now | rnapi->coal_now;
 
 	if (loopback_mode == TG3_MAC_LOOPBACK) {