[PATCH net-next v2] ibmvnic: Bail from ibmvnic_open if driver is already open

[John Allen]

If the driver is already in the "open" state, don't attempt the procedure
for opening the driver.

Signed-off-by: John Allen <jal...@linux.vnet.ibm.com>
---
v2: Unlock reset_lock mutex before returning.

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c 
b/drivers/net/ethernet/ibm/ibmvnic.c
index 7be4b06..9a5e8ac 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1057,6 +1057,11 @@ static int ibmvnic_open(struct net_device *netdev)

        mutex_lock(&adapter->reset_lock);

+       if (adapter->state == VNIC_OPEN) {
+               mutex_unlock(&adapter->reset_lock);
+               return 0;
+       }
+
        if (adapter->state != VNIC_CLOSED) {
                rc = ibmvnic_login(netdev);
                if (rc) {