RDMA/nes: Enable MC/UC after changing MTU

Re-enable multicast and unicast after changing MTU.

Signed-off-by: Bob Sharp <bsharp@neteffect.com>
Signed-off-by: Sweta Bhatt <sweta.bhatt@einfochips.com>
Signed-off-by: Chien Tung <ctung@neteffect.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/nes/nes_nic.c b/drivers/infiniband/hw/nes/nes_nic.c
index 1b0938c87774..77e258a57d4c 100644
--- a/drivers/infiniband/hw/nes/nes_nic.c
+++ b/drivers/infiniband/hw/nes/nes_nic.c
@@ -918,6 +918,10 @@ static int nes_netdev_change_mtu(struct net_device *netdev, int new_mtu)
         struct nes_device *nesdev = nesvnic->nesdev;
         int ret = 0;
         u8 jumbomode = 0;
+        u32 nic_active;
+        u32 nic_active_bit;
+        u32 uc_all_active;
+        u32 mc_all_active;
 
         if ((new_mtu < ETH_ZLEN) || (new_mtu > max_mtu))
                 return -EINVAL;
@@ -931,8 +935,24 @@ static int nes_netdev_change_mtu(struct net_device *netdev, int new_mtu)
         nes_nic_init_timer_defaults(nesdev, jumbomode);
 
         if (netif_running(netdev)) {
+                nic_active_bit = 1 << nesvnic->nic_index;
+                mc_all_active = nes_read_indexed(nesdev,
+                                NES_IDX_NIC_MULTICAST_ALL) & nic_active_bit;
+                uc_all_active = nes_read_indexed(nesdev,
+                                NES_IDX_NIC_UNICAST_ALL)  & nic_active_bit;
+
                 nes_netdev_stop(netdev);
                 nes_netdev_open(netdev);
+
+                nic_active = nes_read_indexed(nesdev,
+                                        NES_IDX_NIC_MULTICAST_ALL);
+                nic_active |= mc_all_active;
+                nes_write_indexed(nesdev, NES_IDX_NIC_MULTICAST_ALL,
+                                                        nic_active);
+
+                nic_active = nes_read_indexed(nesdev, NES_IDX_NIC_UNICAST_ALL);
+                nic_active |= uc_all_active;
+                nes_write_indexed(nesdev, NES_IDX_NIC_UNICAST_ALL, nic_active);
         }
 
         return ret;