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Subject[PATCH 1/1] driver/net: add missing rtnl lock/unlock for benet
Date
From: "Li, Zhen-Hua" <zhen-hual@hp.com>

In benet driver, netif_device_detach and netif_device_attach should be
called between rtnl_lock and rtnl_unlock.

Signed-off-by: Li, Zhen-Hua <zhen-hual@hp.com>
---
drivers/net/ethernet/emulex/benet/be_main.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 3e6df47..9c44b3f 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -4555,8 +4555,11 @@ static void be_func_recovery_task(struct work_struct *work)
rtnl_unlock();

status = lancer_recover_func(adapter);
- if (!status)
+ if (!status) {
+ rtnl_lock();
netif_device_attach(adapter->netdev);
+ rtnl_unlock();
+ }
}

/* In Lancer, for all errors other than provisioning error (-EAGAIN),
@@ -4784,12 +4787,12 @@ static int be_suspend(struct pci_dev *pdev, pm_message_t state)
be_intr_set(adapter, false);
cancel_delayed_work_sync(&adapter->func_recovery_work);

+ rtnl_lock();
netif_device_detach(netdev);
if (netif_running(netdev)) {
- rtnl_lock();
be_close(netdev);
- rtnl_unlock();
}
+ rtnl_unlock();
be_clear(adapter);

pci_save_state(pdev);
@@ -4804,7 +4807,9 @@ static int be_resume(struct pci_dev *pdev)
struct be_adapter *adapter = pci_get_drvdata(pdev);
struct net_device *netdev = adapter->netdev;

+ rtnl_lock();
netif_device_detach(netdev);
+ rtnl_unlock();

status = pci_enable_device(pdev);
if (status)
@@ -4832,7 +4837,9 @@ static int be_resume(struct pci_dev *pdev)

schedule_delayed_work(&adapter->func_recovery_work,
msecs_to_jiffies(1000));
+ rtnl_lock();
netif_device_attach(netdev);
+ rtnl_unlock();

if (adapter->wol_en)
be_setup_wol(adapter, false);
@@ -4853,7 +4860,9 @@ static void be_shutdown(struct pci_dev *pdev)
cancel_delayed_work_sync(&adapter->work);
cancel_delayed_work_sync(&adapter->func_recovery_work);

+ rtnl_lock();
netif_device_detach(adapter->netdev);
+ rtnl_unlock();

be_cmd_reset_function(adapter);

@@ -4957,7 +4966,9 @@ static void be_eeh_resume(struct pci_dev *pdev)

schedule_delayed_work(&adapter->func_recovery_work,
msecs_to_jiffies(1000));
+ rtnl_lock();
netif_device_attach(netdev);
+ rtnl_unlock();
return;
err:
dev_err(&adapter->pdev->dev, "EEH resume failed\n");
--
1.7.10.4


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