linux-kernel - [PATCH 5.15 077/139] ibmvnic: schedule failover only if vioctl fails

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Message-Id: <20220228172355.825625607@linuxfoundation.org>
Date:   Mon, 28 Feb 2022 18:24:11 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Cris Forno <cforno12@...look.com>,
        Sukadev Bhattiprolu <sukadev@...ux.ibm.com>,
        Dany Madden <drt@...ux.ibm.com>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 5.15 077/139] ibmvnic: schedule failover only if vioctl fails

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

commit 277f2bb14361790a70e4b3c649e794b75a91a597 upstream.

If client is unable to initiate a failover reset via H_VIOCTL hcall, then
it should schedule a failover reset as a last resort. Otherwise, there is
no need to do a last resort.

Fixes: 334c42414729 ("ibmvnic: improve failover sysfs entry")
Reported-by: Cris Forno <cforno12@...look.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.ibm.com>
Signed-off-by: Dany Madden <drt@...ux.ibm.com>
Link: https://lore.kernel.org/r/20220221210545.115283-1-drt@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/ibm/ibmvnic.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -5733,10 +5733,14 @@ static ssize_t failover_store(struct dev
 		   be64_to_cpu(session_token));
 	rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
 				H_SESSION_ERR_DETECTED, session_token, 0, 0);
-	if (rc)
+	if (rc) {
 		netdev_err(netdev,
 			   "H_VIOCTL initiated failover failed, rc %ld\n",
 			   rc);
+		goto last_resort;
+	}
+
+	return count;
 
 last_resort:
 	netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n");