linux-kernel - [PATCH] igb: Fix a deadlock in igb_sriov

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Message-Id: <1438572986-32708-1-git-send-email-baijiaju1990@163.com>
Date:	Mon,  3 Aug 2015 11:36:26 +0800
From:	Jia-Ju Bai <baijiaju1990@....com>
To:	jeffrey.t.kirsher@...el.com, jesse.brandeburg@...el.com
Cc:	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Jia-Ju Bai <baijiaju1990@....com>
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 <baijiaju1990@....com>
---
 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


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