[Intel-wired-lan] [PATCH v1 2/9] fm10k: Fix multicast mode sync issues

[Jacob Keller]

From: Ngai-Mint Kwan <ngai-mint.kwan at intel.com>

Multicast mode checking is no longer a requirement to perform unicast
and multicast address syncs. Specifically, a device operating in
promiscuous and/or all multicast mode is not excluded. The issue occurs
when the netdev is pre-configured to either multicast mode and is
enabled for the first time. The multicast-group table in the Switch
Manager will be missing obvious multicast entries associated to this
netdev.

Changes were also made to disallow unicast and multicast syncs with
VLAN 0. The Switch Manager considers VLAN 0 to be an invalid entry.
Requests with VLAN 0 by the netdev are only generated when the driver is
freshly installed and the default VID is not set.

Signed-off-by: Ngai-Mint Kwan <ngai-mint.kwan at intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller at intel.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k_netdev.c | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
index 32778dda8c12..bf229d54c20c 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
@@ -877,7 +877,7 @@ static int __fm10k_uc_sync(struct net_device *dev,
 		return -EADDRNOTAVAIL;
 
 	/* update table with current entries */
-	for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 0;
+	for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 1;
 	     vid < VLAN_N_VID;
 	     vid = fm10k_find_next_vlan(interface, vid)) {
 		err = hw->mac.ops.update_uc_addr(hw, glort, addr,
@@ -940,7 +940,7 @@ static int __fm10k_mc_sync(struct net_device *dev,
 	u16 vid, glort = interface->glort;
 
 	/* update table with current entries */
-	for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 0;
+	for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 1;
 	     vid < VLAN_N_VID;
 	     vid = fm10k_find_next_vlan(interface, vid)) {
 		hw->mac.ops.update_mc_addr(hw, glort, addr, vid, sync);
@@ -995,11 +995,8 @@ static void fm10k_set_rx_mode(struct net_device *dev)
 	}
 
 	/* synchronize all of the addresses */
-	if (xcast_mode != FM10K_XCAST_MODE_PROMISC) {
-		__dev_uc_sync(dev, fm10k_uc_sync, fm10k_uc_unsync);
-		if (xcast_mode != FM10K_XCAST_MODE_ALLMULTI)
-			__dev_mc_sync(dev, fm10k_mc_sync, fm10k_mc_unsync);
-	}
+	__dev_uc_sync(dev, fm10k_uc_sync, fm10k_uc_unsync);
+	__dev_mc_sync(dev, fm10k_mc_sync, fm10k_mc_unsync);
 
 	fm10k_mbx_unlock(interface);
 }
@@ -1037,7 +1034,7 @@ void fm10k_restore_rx_state(struct fm10k_intfc *interface)
 	hw->mac.ops.update_vlan(hw, 0, 0, true);
 
 	/* update table with current entries */
-	for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 0;
+	for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 1;
 	     vid < VLAN_N_VID;
 	     vid = fm10k_find_next_vlan(interface, vid)) {
 		hw->mac.ops.update_vlan(hw, vid, 0, true);
@@ -1049,11 +1046,8 @@ void fm10k_restore_rx_state(struct fm10k_intfc *interface)
 	hw->mac.ops.update_xcast_mode(hw, glort, xcast_mode);
 
 	/* synchronize all of the addresses */
-	if (xcast_mode != FM10K_XCAST_MODE_PROMISC) {
-		__dev_uc_sync(netdev, fm10k_uc_sync, fm10k_uc_unsync);
-		if (xcast_mode != FM10K_XCAST_MODE_ALLMULTI)
-			__dev_mc_sync(netdev, fm10k_mc_sync, fm10k_mc_unsync);
-	}
+	__dev_uc_sync(netdev, fm10k_uc_sync, fm10k_uc_unsync);
+	__dev_mc_sync(netdev, fm10k_mc_sync, fm10k_mc_unsync);
 
 	fm10k_mbx_unlock(interface);
 
-- 
2.8.0.rc1.177.g5628860