netdev - [PATCH net] ibmvnic: Disable irqs before exiting reset from closed state

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 30 Mar 2018 13:44:21 -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>
Subject: [PATCH net] ibmvnic: Disable irqs before exiting reset from closed
 state

When the driver is closed, all the associated irqs are disabled. In the
event that the driver exits a reset in the closed state, we should be
consistent with the state we are in directly after a close. So before we
exit the reset routine, all irqs should be disabled as well. This will
prevent the irqs from being enabled twice in this case and reporting a
number of noisy warning traces.

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 0389a7a..b492af6 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1167,19 +1167,11 @@ static void clean_tx_pools(struct ibmvnic_adapter *adapter)
 	}
 }

-static void ibmvnic_cleanup(struct net_device *netdev)
+static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
 {
-	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	struct net_device *netdev = adapter->netdev;
 	int i;

-	/* ensure that transmissions are stopped if called by do_reset */
-	if (adapter->resetting)
-		netif_tx_disable(netdev);
-	else
-		netif_tx_stop_all_queues(netdev);
-
-	ibmvnic_napi_disable(adapter);
-
 	if (adapter->tx_scrq) {
 		for (i = 0; i < adapter->req_tx_queues; i++)
 			if (adapter->tx_scrq[i]->irq) {
@@ -1198,6 +1190,21 @@ static void ibmvnic_cleanup(struct net_device *netdev)
 			}
 		}
 	}
+}
+
+static void ibmvnic_cleanup(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	/* ensure that transmissions are stopped if called by do_reset */
+	if (adapter->resetting)
+		netif_tx_disable(netdev);
+	else
+		netif_tx_stop_all_queues(netdev);
+
+	ibmvnic_napi_disable(adapter);
+	ibmvnic_disable_irqs(adapter);
+
 	clean_rx_pools(adapter);
 	clean_tx_pools(adapter);
 }
@@ -1772,6 +1779,7 @@ static int do_reset(struct ibmvnic_adapter *adapter,
 		}
 	}

+	ibmvnic_disable_irqs(adapter);
 	adapter->state = VNIC_CLOSED;

 	if (reset_state == VNIC_CLOSED)