qlcnic: Fix panic while setting VF's MAC address

o "qlcnic_sriov" structure pointer should be accessed only
  when SR-IOV is enabled. Access this pointer after SR-IOV
  PF check.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@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 ee0c1d3..b9b88f3 100644 (file)
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c
@@ -1621,13 +1621,15 @@ int qlcnic_sriov_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
 {
        struct qlcnic_adapter *adapter = netdev_priv(netdev);
        struct qlcnic_sriov *sriov = adapter->ahw->sriov;
-       int i, num_vfs = sriov->num_vfs;
+       int i, num_vfs;
        struct qlcnic_vf_info *vf_info;
        u8 *curr_mac;
 
        if (!qlcnic_sriov_pf_check(adapter))
                return -EOPNOTSUPP;
 
+       num_vfs = sriov->num_vfs;
+
        if (!is_valid_ether_addr(mac) || vf >= num_vfs)
                return -EINVAL;