netdev - [PATCH net-next] ibmvnic: Fix reset return from closed state

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Message-Id: <d5b220af-d4f7-ec43-a601-28c1d4c0692e@linux.vnet.ibm.com>
Date:   Wed, 14 Mar 2018 10:41:29 -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>,
        Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next] ibmvnic: Fix reset return from closed state

The case in which we handle a reset from the state where the device is
closed seems to be bugged for all types of reset. For most types of reset
we currently exit the reset routine correctly, but don't set the state to
indicate that we are back in the "closed" state. For some specific cases,
we don't exit the reset routine at all and resetting will cause a closed
device to be opened.

This patch fixes the problem by unconditionally checking the reset_state
and correctly setting the adapter state before returning.

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..b103a7e 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1714,12 +1714,14 @@ static int do_reset(struct ibmvnic_adapter *adapter,
 			rc = reset_rx_pools(adapter);
 			if (rc)
 				return rc;
-
-			if (reset_state == VNIC_CLOSED)
-				return 0;
 		}
 	}

+	adapter->state = VNIC_CLOSED;
+
+	if (reset_state == VNIC_CLOSED)
+		return 0;
+
 	rc = __ibmvnic_open(netdev);
 	if (rc) {
 		if (list_empty(&adapter->rwi_list))