igb: delay VF reset notification until after interrupts are enabed

This update delays the VF reset notification until after interrupts are
enabled.  Otherwise there is a chance of having the VF try to reset itself too
soon and being ignored by the PF as a result.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index ea05604..24a119e 100644 (file)
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -1165,6 +1165,13 @@ int igb_up(struct igb_adapter *adapter)
        rd32(E1000_ICR);
        igb_irq_enable(adapter);
 
+       /* notify VFs that reset has been completed */
+       if (adapter->vfs_allocated_count) {
+               u32 reg_data = rd32(E1000_CTRL_EXT);
+               reg_data |= E1000_CTRL_EXT_PFRSTD;
+               wr32(E1000_CTRL_EXT, reg_data);
+       }
+
        netif_tx_start_all_queues(adapter->netdev);
 
        /* Fire a link change interrupt to start the watchdog. */
@@ -1948,6 +1955,13 @@ static int igb_open(struct net_device *netdev)
 
        igb_irq_enable(adapter);
 
+       /* notify VFs that reset has been completed */
+       if (adapter->vfs_allocated_count) {
+               u32 reg_data = rd32(E1000_CTRL_EXT);
+               reg_data |= E1000_CTRL_EXT_PFRSTD;
+               wr32(E1000_CTRL_EXT, reg_data);
+       }
+
        netif_tx_start_all_queues(netdev);
 
        /* Fire a link status change interrupt to start the watchdog. */
@@ -5785,19 +5799,18 @@ static int igb_set_vf_mac(struct igb_adapter *adapter,
 static void igb_vmm_control(struct igb_adapter *adapter)
 {
        struct e1000_hw *hw = &adapter->hw;
-       u32 reg_data;
 
-       if (!adapter->vfs_allocated_count)
+       /* replication is not supported for 82575 */
+       if (hw->mac.type == e1000_82575)
                return;
 
-       /* VF's need PF reset indication before they
-        * can send/receive mail */
-       reg_data = rd32(E1000_CTRL_EXT);
-       reg_data |= E1000_CTRL_EXT_PFRSTD;
-       wr32(E1000_CTRL_EXT, reg_data);
-
-       igb_vmdq_set_loopback_pf(hw, true);
-       igb_vmdq_set_replication_pf(hw, true);
+       if (adapter->vfs_allocated_count) {
+               igb_vmdq_set_loopback_pf(hw, true);
+               igb_vmdq_set_replication_pf(hw, true);
+       } else {
+               igb_vmdq_set_loopback_pf(hw, false);
+               igb_vmdq_set_replication_pf(hw, false);
+       }
 }
 
 /* igb_main.c */