netdev - [PATCH net-next 1/2] ibmvnic: print reset reason as a string

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Date:   Mon, 12 Apr 2021 02:41:27 -0500
From:   Lijun Pan <lijunp213@...il.com>
To:     netdev@...r.kernel.org
Cc:     Lijun Pan <lijunp213@...il.com>
Subject: [PATCH net-next 1/2] ibmvnic: print reset reason as a string

The reset reason can be added or deleted over different versions
of the source code. Print a string instead of a number.

Signed-off-by: Lijun Pan <lijunp213@...il.com>
---
 drivers/net/ethernet/ibm/ibmvnic.c | 35 ++++++++++++++++++++++++------
 1 file changed, 28 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 473411542911..5c89dd7fa3de 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1911,6 +1911,26 @@ static int ibmvnic_set_mac(struct net_device *netdev, void *p)
 	return rc;
 }
 
+static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason)
+{
+	switch (reason) {
+	case VNIC_RESET_FAILOVER:
+		return "FAILOVER";
+	case VNIC_RESET_MOBILITY:
+		return "MOBILITY";
+	case VNIC_RESET_FATAL:
+		return "FATAL";
+	case VNIC_RESET_NON_FATAL:
+		return "NON_FATAL";
+	case VNIC_RESET_TIMEOUT:
+		return "TIMEOUT";
+	case VNIC_RESET_CHANGE_PARAM:
+		return "CHANGE_PARAM";
+	default:
+		return "UNKNOWN";
+	}
+}
+
 /*
  * do_reset returns zero if we are able to keep processing reset events, or
  * non-zero if we hit a fatal error and must halt.
@@ -1924,9 +1944,9 @@ static int do_reset(struct ibmvnic_adapter *adapter,
 	int i, rc;
 
 	netdev_dbg(adapter->netdev,
-		   "[S:%d FOP:%d] Reset reason %d, reset_state %d\n",
+		   "[S:%d FOP:%d] Reset reason: %s, reset_state %d\n",
 		   adapter->state, adapter->failover_pending,
-		   rwi->reset_reason, reset_state);
+		   reset_reason_to_string(rwi->reset_reason), reset_state);
 
 	adapter->reset_reason = rwi->reset_reason;
 	/* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */
@@ -2139,8 +2159,8 @@ static int do_hard_reset(struct ibmvnic_adapter *adapter,
 	struct net_device *netdev = adapter->netdev;
 	int rc;
 
-	netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
-		   rwi->reset_reason);
+	netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n",
+		   reset_reason_to_string(rwi->reset_reason));
 
 	/* read the state and check (again) after getting rtnl */
 	reset_state = adapter->state;
@@ -2363,8 +2383,8 @@ static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
 	list_for_each(entry, &adapter->rwi_list) {
 		tmp = list_entry(entry, struct ibmvnic_rwi, list);
 		if (tmp->reset_reason == reason) {
-			netdev_dbg(netdev, "Skipping matching reset, reason=%d\n",
-				   reason);
+			netdev_dbg(netdev, "Skipping matching reset, reason=%s\n",
+				   reset_reason_to_string(reason));
 			ret = EBUSY;
 			goto err;
 		}
@@ -2384,7 +2404,8 @@ static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
 	}
 	rwi->reset_reason = reason;
 	list_add_tail(&rwi->list, &adapter->rwi_list);
-	netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
+	netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n",
+		   reset_reason_to_string(reason));
 	schedule_work(&adapter->ibmvnic_reset);
 
 	ret = 0;
-- 
2.23.0