From: Jia-Ju Bai <baijiaju1990@163.com>
Date: Mon, 3 Aug 2015 03:36:26 +0000 (+0800)
Subject: igb: Fix a deadlock in igb_sriov_reinit
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=3eb14ea8d9584e96680729c2c7a9129bafa13a39;p=openwrt%2Fstaging%2Fblogic.git

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 <baijiaju1990@163.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 8d22298236ad..17c1c842c33d 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -7413,6 +7413,7 @@ static int igb_resume(struct device *dev)
 
 	if (igb_init_interrupt_scheme(adapter, true)) {
 		dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
+		rtnl_unlock();
 		return -ENOMEM;
 	}