[PATCH] igb: Fix a deadlock in igb_sriov_reinit

When igb_init_interrupt_scheme in igb_sriov_reinit is failed, the lock 
acquired by rtnl_lock() is not released, which causes a deadlock.
This patch adds rtnl_unlock() in error handling to fix it.

Signed-off-by: Jia-Ju Bai <redacted>
---
 drivers/net/ethernet/intel/igb/igb_main.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 2f70a9b..311d1ca 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c

@@ -7539,6 +7539,7 @@ static int igb_sriov_reinit(struct pci_dev *dev)
 
 	if (igb_init_interrupt_scheme(adapter, true)) {
 		dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
+		rtnl_unlock();
 		return -ENOMEM;
 	}
 

-- 
1.7.9.5

From: netdev-owner@vger.kernel.org [mailto:netdev-owner@vger.kernel.org]
On Behalf Of Jia-Ju Bai
Sent: Sunday, August 02, 2015 8:36 PM
To: Kirsher, Jeffrey T; Brandeburg, Jesse
Cc: intel-wired-lan@lists.osuosl.org; netdev@vger.kernel.org; linux-
kernel@vger.kernel.org; Jia-Ju Bai
Subject: [PATCH] igb: Fix a deadlock in igb_sriov_reinit

When igb_init_interrupt_scheme in igb_sriov_reinit is failed, the lock
acquired by rtnl_lock() is not released, which causes a deadlock.
This patch adds rtnl_unlock() in error handling to fix it.

Signed-off-by: Jia-Ju Bai <redacted>
---
 drivers/net/ethernet/intel/igb/igb_main.c |    1 +
 1 file changed, 1 insertion(+)

Tested-by: Aaron Brown <redacted>