igb: fix rtnl race in PM resume path

[lisovros/linux_canprio.git] / drivers / net / ethernet / intel / igb / igb_main.c

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index d22350055285dbd7b8cfc9754ae578d0f7e06bd0..8683ca4748c882130cab85dc1fd7433cd2ce4375 100644 (file)
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -1111,9 +1111,12 @@ msi_only:
                adapter->flags |= IGB_FLAG_HAS_MSI;
 out:
        /* Notify the stack of the (possibly) reduced queue counts. */
+       rtnl_lock();
        netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
-       return netif_set_real_num_rx_queues(adapter->netdev,
-                                           adapter->num_rx_queues);
+       err = netif_set_real_num_rx_queues(adapter->netdev,
+               adapter->num_rx_queues);
+       rtnl_unlock();
+       return err;
 }
 
 /**
@@ -6796,18 +6799,7 @@ static int igb_resume(struct device *dev)
        pci_enable_wake(pdev, PCI_D3hot, 0);
        pci_enable_wake(pdev, PCI_D3cold, 0);
 
-       if (!rtnl_is_locked()) {
-               /*
-                * shut up ASSERT_RTNL() warning in
-                * netif_set_real_num_tx/rx_queues.
-                */
-               rtnl_lock();
-               err = igb_init_interrupt_scheme(adapter);
-               rtnl_unlock();
-       } else {
-               err = igb_init_interrupt_scheme(adapter);
-       }
-       if (err) {
+       if (igb_init_interrupt_scheme(adapter)) {
                dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
                return -ENOMEM;
        }