netdev - [net] igb: do a reset on SR-IOV re-init if device is down

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Date:	Thu, 10 Jul 2014 03:29:39 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	davem@...emloft.net
Cc:	Stefan Assmann <sassmann@...nic.de>, netdev@...r.kernel.org,
	nhorman@...hat.com, sassmann@...hat.com,
	stable <stable@...r.kernel.org>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net] igb: do a reset on SR-IOV re-init if device is down

From: Stefan Assmann <sassmann@...nic.de>

To properly re-initialize SR-IOV it is necessary to reset the device
even if it is already down. Not doing this may result in Tx unit hangs.

Cc: stable <stable@...r.kernel.org>
Signed-off-by: Stefan Assmann <sassmann@...nic.de>
Tested-by: Aaron Brown <aaron.f.brown@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 57a96e0..a9537ba 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -7592,6 +7592,8 @@ static int igb_sriov_reinit(struct pci_dev *dev)
 
 	if (netif_running(netdev))
 		igb_close(netdev);
+	else
+		igb_reset(adapter);
 
 	igb_clear_interrupt_scheme(adapter);
 
-- 
1.9.3

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