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qlcnic: Do not disable SR-IOV when VFs are assigned to VMs

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o While disabling SR-IOV when VFs are assigned to VMs causes host crash
  so return -EPERM when user request to disable SR-IOV using pci sysfs in
  case of VFs are assigned to VMs.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Manish Chopra 2014-04-14 10:02:23 -04:00 committed by David S. Miller
parent 4f03022777
commit 696f1943a1
1 changed files with 10 additions and 0 deletions
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10
drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c
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@ -461,6 +461,16 @@ static int qlcnic_pci_sriov_disable(struct qlcnic_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
if (pci_vfs_assigned(adapter->pdev)) {
netdev_err(adapter->netdev,
"SR-IOV VFs belonging to port %d are assigned to VMs. SR-IOV can not be disabled on this port\n",
adapter->portnum);
netdev_info(adapter->netdev,
"Please detach SR-IOV VFs belonging to port %d from VMs, and then try to disable SR-IOV on this port\n",
adapter->portnum);
return -EPERM;
}
rtnl_lock();
if (netif_running(netdev))
__qlcnic_down(adapter, netdev);