diff -urN linux-2.6.19.ref/drivers/net/b44.c linux-2.6.19/drivers/net/b44.c
--- linux-2.6.19.ref/drivers/net/b44.c	2006-12-04 21:34:14.000000000 +0100
+++ linux-2.6.19/drivers/net/b44.c	2006-12-04 21:34:19.000000000 +0100
@@ -1445,6 +1445,7 @@
 {
 	struct b44 *bp = netdev_priv(dev);
 	struct sockaddr *addr = p;
+ 	u32 val;
 
 	if (netif_running(dev))
 		return -EBUSY;
@@ -1455,7 +1456,11 @@
 	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
 
 	spin_lock_irq(&bp->lock);
-	__b44_set_mac_addr(bp);
+
+   	val = br32(bp, B44_RXCONFIG);
+   	if (!(val & RXCONFIG_CAM_ABSENT))
+		__b44_set_mac_addr(bp);
+
 	spin_unlock_irq(&bp->lock);
 
 	return 0;
@@ -1797,7 +1802,7 @@
 
 	val = br32(bp, B44_RXCONFIG);
 	val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
-	if (dev->flags & IFF_PROMISC) {
+	if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
 		val |= RXCONFIG_PROMISC;
 		bw32(bp, B44_RXCONFIG, val);
 	} else {
diff -urN linux-2.6.19.ref/drivers/net/b44.h linux-2.6.19/drivers/net/b44.h
--- linux-2.6.19.ref/drivers/net/b44.h	2006-12-04 21:34:14.000000000 +0100
+++ linux-2.6.19/drivers/net/b44.h	2006-12-04 21:34:19.000000000 +0100
@@ -129,6 +129,7 @@
 #define  RXCONFIG_FLOW		0x00000020 /* Flow Control Enable */
 #define  RXCONFIG_FLOW_ACCEPT	0x00000040 /* Accept Unicast Flow Control Frame */
 #define  RXCONFIG_RFILT		0x00000080 /* Reject Filter */
+#define  RXCONFIG_CAM_ABSENT	0x00000100 /* CAM Absent */
 #define B44_RXMAXLEN	0x0404UL /* EMAC RX Max Packet Length */
 #define B44_TXMAXLEN	0x0408UL /* EMAC TX Max Packet Length */
 #define B44_MDIO_CTRL	0x0410UL /* EMAC MDIO Control */