net: ena: fix missing lock during device destruction
authorNetanel Belgazal <netanel@amazon.com>
Sun, 9 Sep 2018 08:15:24 +0000 (08:15 +0000)
committerDavid S. Miller <davem@davemloft.net>
Sun, 9 Sep 2018 14:59:56 +0000 (07:59 -0700)
acquire the rtnl_lock during device destruction to avoid
using partially destroyed device.

ena_remove() shares almost the same logic as ena_destroy_device(),
so use ena_destroy_device() and avoid duplications.

Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/amazon/ena/ena_netdev.c

index a68c2a8..b9ce2a6 100644 (file)
@@ -3421,24 +3421,18 @@ static void ena_remove(struct pci_dev *pdev)
 
        unregister_netdev(netdev);
 
-       /* Reset the device only if the device is running. */
+       /* If the device is running then we want to make sure the device will be
+        * reset to make sure no more events will be issued by the device.
+        */
        if (test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
-               ena_com_dev_reset(ena_dev, adapter->reset_reason);
-
-       ena_free_mgmnt_irq(adapter);
+               set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
 
-       ena_disable_msix(adapter);
+       rtnl_lock();
+       ena_destroy_device(adapter, true);
+       rtnl_unlock();
 
        free_netdev(netdev);
 
-       ena_com_mmio_reg_read_request_destroy(ena_dev);
-
-       ena_com_abort_admin_commands(ena_dev);
-
-       ena_com_wait_for_abort_completion(ena_dev);
-
-       ena_com_admin_destroy(ena_dev);
-
        ena_com_rss_destroy(ena_dev);
 
        ena_com_delete_debug_area(ena_dev);