netdev - [PATCH net 07/15] ibmvnic: delay next reset if hard reset failed

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Message-Id: <20201120224049.46933-8-ljp@linux.ibm.com>
Date:   Fri, 20 Nov 2020 16:40:41 -0600
From:   Lijun Pan <ljp@...ux.ibm.com>
To:     netdev@...r.kernel.org
Cc:     sukadev@...ux.ibm.com, drt@...ux.ibm.com
Subject: [PATCH net 07/15] ibmvnic: delay next reset if hard reset failed

From: Sukadev Bhattiprolu <sukadev@...ux.ibm.com>

If auto-priority failover is enabled, the backing device needs time
to settle if hard resetting fails for any reason. So add a delay of
60 seconds before retrying the hard-reset.

Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.ibm.com>
---
 drivers/net/ethernet/ibm/ibmvnic.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 6f775ca4bea1..b0a93556a51b 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -2280,6 +2280,14 @@ static void __ibmvnic_reset(struct work_struct *work)
 				rc = do_hard_reset(adapter, rwi, reset_state);
 				rtnl_unlock();
 			}
+			if (rc) {
+				/* give backing device time to settle down */
+				netdev_dbg(adapter->netdev,
+					   "[S:%d] Hard reset failed, waiting 60 secs\n",
+					   adapter->state);
+				set_current_state(TASK_UNINTERRUPTIBLE);
+				schedule_timeout(60 * HZ);
+			}
 		} else if (!(rwi->reset_reason == VNIC_RESET_FATAL &&
 				adapter->from_passive_init)) {
 			rc = do_reset(adapter, rwi, reset_state);
-- 
2.23.0