Patch "net: mvneta: Fix for_each_present_cpu usage" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

net: mvneta: Fix for_each_present_cpu usage

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
net-mvneta-fix-for_each_present_cpu-usage.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Gregory CLEMENT <[email protected]>
Date: Thu, 4 Feb 2016 22:09:23 +0100
Subject: net: mvneta: Fix for_each_present_cpu usage

From: Gregory CLEMENT <[email protected]>

commit 129219e4950a3fcf9323b3bbd8b224c7aa873985 upstream.

This patch convert the for_each_present in on_each_cpu, instead of applying on the present cpus it will be applied only on the online cpus. This fix a bug reported on
http://thread.gmane.org/gmane.linux.ports.arm.kernel/468173.

Using the macro on_each_cpu (instead of a for_each_* loop) also ensures that all the calls will be done all at once.

---
 drivers/net/ethernet/marvell/mvneta.c |    8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

@@ -2446,7 +2446,7 @@ static void mvneta_start_dev(struct mvne
 	mvneta_port_enable(pp);
 
 	/* Enable polling on the port */
-	for_each_present_cpu(cpu) {
+	for_each_online_cpu(cpu) {
 		struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu);
 
 		napi_enable(&port->napi);

@@ -2472,7 +2472,7 @@ static void mvneta_stop_dev(struct mvnet
 
 	phy_stop(pp->phy_dev);
 
-	for_each_present_cpu(cpu) {
+	for_each_online_cpu(cpu) {
 		struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu);
 
 		napi_disable(&port->napi);

@@ -2902,13 +2902,11 @@ err_cleanup_rxqs:
 static int mvneta_stop(struct net_device *dev)
 {
 	struct mvneta_port *pp = netdev_priv(dev);
-	int cpu;
 
 	mvneta_stop_dev(pp);
 	mvneta_mdio_remove(pp);
 	unregister_cpu_notifier(&pp->cpu_notifier);
-	for_each_present_cpu(cpu)
-		smp_call_function_single(cpu, mvneta_percpu_disable, pp, true);
+	on_each_cpu(mvneta_percpu_disable, pp, true);
 	free_percpu_irq(dev->irq, pp->ports);
 	mvneta_cleanup_rxqs(pp);
 	mvneta_cleanup_txqs(pp);

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/net-mvneta-fix-for_each_present_cpu-usage.patch