netdev - [PATCH 1/1] driver/net: add missing rtnl lock/unlock for benet

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Date:	Tue, 15 Apr 2014 14:45:52 +0800
From:	"Li, Zhen-Hua" <zhen-hual@...com>
To:	Sathya Perla <sathya.perla@...lex.com>,
	Subbu Seetharaman <subbu.seetharaman@...lex.com>,
	Ajit Khaparde <ajit.khaparde@...lex.com>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Cc:	"Li, Zhen-Hua" <zhen-hual@...com>
Subject: [PATCH 1/1] driver/net: add missing rtnl lock/unlock for benet

From: "Li, Zhen-Hua" <zhen-hual@...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@...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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