linux-kernel - [PATCH 3.2 44/94] igb: do a reset on SR-IOV re-init if device is down

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Date:	Mon, 04 Aug 2014 17:48:32 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"Jeff Kirsher" <jeffrey.t.kirsher@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	"Aaron Brown" <aaron.f.brown@...el.com>,
	"Stefan Assmann" <sassmann@...nic.de>
Subject: [PATCH 3.2 44/94] igb: do a reset on SR-IOV re-init if device is down

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

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

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

commit 76252723e88681628a3dbb9c09c963e095476f73 upstream.

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.

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>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/ethernet/intel/igb/igb_main.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -6610,6 +6610,8 @@ static int __igb_shutdown(struct pci_dev
 
 	if (netif_running(netdev))
 		igb_close(netdev);
+	else
+		igb_reset(adapter);
 
 	igb_clear_interrupt_scheme(adapter);
 

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