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authorBenjamin Poirier <bpoirier@suse.de>2012-05-10 15:38:37 +0000
committerDavid S. Miller <davem@davemloft.net>2012-05-10 22:44:46 -0400
commitcfb8c3aa59302636c69890be10b2ef23a7ca83b2 (patch)
tree807db877df7d1ff7282d0966d9cf9a441d6fbf0f /drivers
parentdccd9ecc374462e5d6a5b8f8110415a86c2213d8 (diff)
igb: fix rtnl race in PM resume path
Since the caller (PM resume code) is not the one holding rtnl, when taking the 'else' branch rtnl may be released at any moment, thereby defeating the whole purpose of this code block. Signed-off-by: Benjamin Poirier <bpoirier@suse.de> Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/intel/igb/igb_main.c20
1 files changed, 6 insertions, 14 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index d2235005528..8683ca4748c 100644
--- 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;
}