igb: do a reset on SR-IOV re-init if device is down

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@vger.kernel.org>
Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 57a96e00df8c..a9537ba7a5a0 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);