qlcnic: Fix SR-IOV configuration

o Interface needs to be brought down and up while configuring SR-IOV.
  Protect interface up/down using rtnl_lock()/rtnl_unlock()

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c
index 330d9a8..686f460 100644 (file)
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c
@@ -397,6 +397,7 @@ static int qlcnic_pci_sriov_disable(struct qlcnic_adapter *adapter)
 {
        struct net_device *netdev = adapter->netdev;
 
+       rtnl_lock();
        if (netif_running(netdev))
                __qlcnic_down(adapter, netdev);
 
@@ -407,12 +408,15 @@ static int qlcnic_pci_sriov_disable(struct qlcnic_adapter *adapter)
        /* After disabling SRIOV re-init the driver in default mode
           configure opmode based on op_mode of function
         */
-       if (qlcnic_83xx_configure_opmode(adapter))
+       if (qlcnic_83xx_configure_opmode(adapter)) {
+               rtnl_unlock();
                return -EIO;
+       }
 
        if (netif_running(netdev))
                __qlcnic_up(adapter, netdev);
 
+       rtnl_unlock();
        return 0;
 }
 
@@ -533,6 +537,7 @@ static int qlcnic_pci_sriov_enable(struct qlcnic_adapter *adapter, int num_vfs)
                return -EIO;
        }
 
+       rtnl_lock();
        if (netif_running(netdev))
                __qlcnic_down(adapter, netdev);
 
@@ -555,6 +560,7 @@ static int qlcnic_pci_sriov_enable(struct qlcnic_adapter *adapter, int num_vfs)
                __qlcnic_up(adapter, netdev);
 
 error:
+       rtnl_unlock();
        return err;
 }