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Subject[PATCH 2/2] ixgbe: add missing rtnl_lock in PM resume path
Date
Upon resume from standby, ixgbe may trigger the ASSERT_RTNL() in
netif_set_real_num_tx_queues(). The call stack is:
netif_set_real_num_tx_queues
ixgbe_set_num_queues
ixgbe_init_interrupt_scheme
ixgbe_resume

Signed-off-by: Benjamin Poirier <bpoirier@suse.de>

---
Unlike patch 1 for igb, we cannot lock rtnl closer to the point where
netif_set_real_num_tx_queues() is called because ixgbe_init_interrupt_scheme()
is also called by the dcb code, already under rtnl.
---
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 3e26b1f..ff6edab 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -4836,7 +4836,9 @@ static int ixgbe_resume(struct pci_dev *pdev)

pci_wake_from_d3(pdev, false);

+ rtnl_lock();
err = ixgbe_init_interrupt_scheme(adapter);
+ rtnl_unlock();
if (err) {
e_dev_err("Cannot initialize interrupts for device\n");
return err;
--
1.7.7


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