netdev - [PATCH net-next] ibmvnic: Bail from ibmvnic

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Message-Id: <f4857e9e-31d9-faa0-43e2-0ec0dfeae7ad@linux.vnet.ibm.com>
Date:   Mon, 12 Mar 2018 13:47:51 -0500
From:   John Allen <jallen@...ux.vnet.ibm.com>
To:     netdev@...r.kernel.org
Cc:     Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>,
        Nathan Fontenot <nfont@...ux.vnet.ibm.com>
Subject: [PATCH net-next] ibmvnic: Bail from ibmvnic_open if driver is already
 open

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

Signed-off-by: John Allen <jallen@...ux.vnet.ibm.com>
---
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 7be4b06..98c4f75 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1057,6 +1057,9 @@ static int ibmvnic_open(struct net_device *netdev)

 	mutex_lock(&adapter->reset_lock);

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