ixgbe: Allow Priority Flow Control settings to survive a device reset

When changing DCB parameters, ixgbe needs to have the MAC reset.  The way
the flow control code is setup today, PFC will be disabled on a reset.
This patch adds a new flow control type for PFC, and then has the netlink
layer take care of toggling which type of flow control to enable.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe_dcb_nl.c b/drivers/net/ixgbe/ixgbe_dcb_nl.c
index 8a9939ee2927..0a8731f1f237 100644
--- a/drivers/net/ixgbe/ixgbe_dcb_nl.c
+++ b/drivers/net/ixgbe/ixgbe_dcb_nl.c
@@ -130,6 +130,7 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
                 adapter->tx_ring = NULL;
                 adapter->rx_ring = NULL;
 
+                adapter->hw.fc.requested_mode = ixgbe_fc_pfc;
                 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
                 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
                 ixgbe_init_interrupt_scheme(adapter);
@@ -138,6 +139,7 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
         } else {
                 /* Turn off DCB */
                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
+                        adapter->hw.fc.requested_mode = ixgbe_fc_default;
                         if (netif_running(netdev))
                                 netdev->netdev_ops->ndo_stop(netdev);
                         ixgbe_reset_interrupt_capability(adapter);