linux-kernel - [PATCH 4.19 156/421] Revert "ibmvnic: remove duplicate napi

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Message-Id: <20210719144951.869225723@linuxfoundation.org>
Date:   Mon, 19 Jul 2021 16:49:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Cristobal Forno <cforno12@...ux.ibm.com>,
        Abdul Haleem <abdhalee@...ibm.com>,
        Dany Madden <drt@...ux.ibm.com>,
        Sukadev Bhattiprolu <sukadev@...ux.ibm.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 156/421] Revert "ibmvnic: remove duplicate napi_schedule call in open function"

From: Dany Madden <drt@...ux.ibm.com>

[ Upstream commit 2ca220f92878470c6ba03f9946e412323093cc94 ]

This reverts commit 7c451f3ef676c805a4b77a743a01a5c21a250a73.

When a vnic interface is taken down and then up, connectivity is not
restored. We bisected it to this commit. Reverting this commit until
we can fully investigate the issue/benefit of the change.

Fixes: 7c451f3ef676 ("ibmvnic: remove duplicate napi_schedule call in open function")
Reported-by: Cristobal Forno <cforno12@...ux.ibm.com>
Reported-by: Abdul Haleem <abdhalee@...ibm.com>
Signed-off-by: Dany Madden <drt@...ux.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.ibm.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/ibm/ibmvnic.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 9f72cd3b1d24..0eb06750a5d6 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1099,6 +1099,11 @@ static int __ibmvnic_open(struct net_device *netdev)
 
 	netif_tx_start_all_queues(netdev);
 
+	if (prev_state == VNIC_CLOSED) {
+		for (i = 0; i < adapter->req_rx_queues; i++)
+			napi_schedule(&adapter->napi[i]);
+	}
+
 	adapter->state = VNIC_OPEN;
 	return rc;
 }
-- 
2.30.2