linux-kernel - [114/118] ixgbe: add missing rtnl

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Message-ID: <lsq.1368193181.655444496@decadent.org.uk>
Date:	Fri, 10 May 2013 14:39:41 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Benjamin Poirier" <bpoirier@...e.de>,
	"Stephen Ko" <stephen.s.ko@...el.com>,
	"Jeff Kirsher" <jeffrey.t.kirsher@...el.com>
Subject: [114/118] ixgbe: add missing rtnl_lock in PM resume path

3.2.45-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Benjamin Poirier <bpoirier@...e.de>

commit 34948a947d1a576c10afee6d14792fd237549577 upstream.

Upon resume from standby, ixgbe may trigger the ASSERT_RTNL() in
netif_set_real_num_tx_queues(). The call stack is:
	netif_set_real_num_tx_queues
	ixgbe_set_num_queues
	ixgbe_init_interrupt_scheme
	ixgbe_resume

Signed-off-by: Benjamin Poirier <bpoirier@...e.de>
Tested-by: Stephen Ko <stephen.s.ko@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -5418,7 +5418,9 @@ static int ixgbe_resume(struct pci_dev *
 
 	pci_wake_from_d3(pdev, false);
 
+	rtnl_lock();
 	err = ixgbe_init_interrupt_scheme(adapter);
+	rtnl_unlock();
 	if (err) {
 		e_dev_err("Cannot initialize interrupts for device\n");
 		return err;

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