bonding: Fix 802.3ad no carrier on "no partner found" instance

	Modify carrier state determination for 802.3ad mode to comply
with section 43.3.9 of IEEE 802.3, which requires that "Links that are
not successful candidates for aggregation (e.g., links that are attached
to other devices that cannot perform aggregation or links that have been
manually configured to be non-aggregatable) are enabled to operate as
individual IEEE 802.3 links."

	Bug reported by Laurent Chavey <chavey@google.com>.  This patch
is an updated version of his patch that changes the wording of
commentary and adds an update to the driver version.

Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Laurent Chavey <chavey@google.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 4 insertions, 5 deletions

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 7e03f41ae2c..f829e4ad8b4 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -2303,19 +2303,18 @@ void bond_3ad_handle_link_change(struct slave *slave, char link)
 }
 
 /*
- * set link state for bonding master: if we have an active partnered
+ * set link state for bonding master: if we have an active 
  * aggregator, we're up, if not, we're down.  Presumes that we cannot
  * have an active aggregator if there are no slaves with link up.
  *
+ * This behavior complies with IEEE 802.3 section 43.3.9.
+ *
  * Called by bond_set_carrier(). Return zero if carrier state does not
  * change, nonzero if it does.
  */
 int bond_3ad_set_carrier(struct bonding *bond)
 {
-	struct aggregator *agg;
-
-	agg = __get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator));
-	if (agg && MAC_ADDRESS_COMPARE(&agg->partner_system, &null_mac_addr)) {
+	if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) {
 		if (!netif_carrier_ok(bond->dev)) {
 			netif_carrier_on(bond->dev);
 			return 1;