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authorBenjamin Poirier <bpoirier@suse.de>2012-05-10 17:38:37 +0200
committerDavid S. Miller <davem@davemloft.net>2012-05-11 04:44:46 +0200
commitcfb8c3aa59302636c69890be10b2ef23a7ca83b2 (patch)
tree807db877df7d1ff7282d0966d9cf9a441d6fbf0f /drivers/net
parentipv4: Do not use dead fib_info entries. (diff)
downloadlinux-cfb8c3aa59302636c69890be10b2ef23a7ca83b2.tar.xz
linux-cfb8c3aa59302636c69890be10b2ef23a7ca83b2.zip
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/net')
-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 d22350055285..8683ca4748c8 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;
}