net: mvneta: Add missing hotplug notifier transition

anna-marialx · davem330 · commit 0df83e7a6b58 · 2016-03-14T15:22:10.000-04:00
The mvneta_percpu_notifier() hotplug callback lacks handling of the
CPU_DOWN_FAILED case. That means, if CPU_DOWN_PREPARE failes, the
driver is not well configured on the CPU.

Add handling for CPU_DOWN_FAILED[_FROZEN] hotplug notifier transition
to setup the driver.

Cc: Thomas Petazzoni &lt;thomas.petazzoni@free-electrons.com&gt;
Cc: netdev@vger.kernel.org
Signed-off-by: Anna-Maria Gleixner &lt;anna-maria@linutronix.de&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
@@ -3328,6 +3328,8 @@ static int mvneta_percpu_notifier(struct notifier_block *nfb,
 	switch (action) {
 	case CPU_ONLINE:
 	case CPU_ONLINE_FROZEN:
+	case CPU_DOWN_FAILED:
+	case CPU_DOWN_FAILED_FROZEN:
 		spin_lock(&pp->lock);
 		/* Configuring the driver for a new CPU while the
 		 * driver is stopping is racy, so just avoid it.
