mvebu: remove linux 4.4 support

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 0 insertions, 128 deletions

diff --git a/target/linux/mvebu/patches-4.4/042-net-mvneta-Fix-race-condition-during-stopping.patch b/target/linux/mvebu/patches-4.4/042-net-mvneta-Fix-race-condition-during-stopping.patch
deleted file mode 100644
index 9936ebf320..0000000000
--- a/target/linux/mvebu/patches-4.4/042-net-mvneta-Fix-race-condition-during-stopping.patch
+++ /dev/null
@@ -1,128 +0,0 @@
-From: Gregory CLEMENT <gregory.clement@free-electrons.com>
-Date: Thu, 4 Feb 2016 22:09:29 +0100
-Subject: [PATCH] net: mvneta: Fix race condition during stopping
-
-When stopping the port, the CPU notifier are still there whereas the
-mvneta_stop_dev function calls mvneta_percpu_disable() on each CPUs.
-It was possible to have a new CPU coming at this point which could be
-racy.
-
-This patch adds a flag preventing executing the code notifier for a new
-CPU when the port is stopping. It also uses the spinlock introduces
-previously. To avoid the deadlock, the lock has been moved outside the
-mvneta_percpu_elect function.
-
-Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
-
---- a/drivers/net/ethernet/marvell/mvneta.c
-+++ b/drivers/net/ethernet/marvell/mvneta.c
-@@ -374,6 +374,7 @@ struct mvneta_port {
- 	 * ensuring that the configuration remains coherent.
- 	 */
- 	spinlock_t lock;
-+	bool is_stopped;
- 
- 	/* Core clock */
- 	struct clk *clk;
-@@ -2853,16 +2854,14 @@ static void mvneta_percpu_disable(void *
- 	disable_percpu_irq(pp->dev->irq);
- }
- 
-+/* Electing a CPU must be done in an atomic way: it should be done
-+ * after or before the removal/insertion of a CPU and this function is
-+ * not reentrant.
-+ */
- static void mvneta_percpu_elect(struct mvneta_port *pp)
- {
- 	int elected_cpu = 0, max_cpu, cpu, i = 0;
- 
--	/* Electing a CPU must be done in an atomic way: it should be
--	 * done after or before the removal/insertion of a CPU and
--	 * this function is not reentrant.
--	 */
--	spin_lock(&pp->lock);
--
- 	/* Use the cpu associated to the rxq when it is online, in all
- 	 * the other cases, use the cpu 0 which can't be offline.
- 	 */
-@@ -2906,7 +2905,6 @@ static void mvneta_percpu_elect(struct m
- 		i++;
- 
- 	}
--	spin_unlock(&pp->lock);
- };
- 
- static int mvneta_percpu_notifier(struct notifier_block *nfb,
-@@ -2920,6 +2918,14 @@ static int mvneta_percpu_notifier(struct
- 	switch (action) {
- 	case CPU_ONLINE:
- 	case CPU_ONLINE_FROZEN:
-+		spin_lock(&pp->lock);
-+		/* Configuring the driver for a new CPU while the
-+		 * driver is stopping is racy, so just avoid it.
-+		 */
-+		if (pp->is_stopped) {
-+			spin_unlock(&pp->lock);
-+			break;
-+		}
- 		netif_tx_stop_all_queues(pp->dev);
- 
- 		/* We have to synchronise on tha napi of each CPU
-@@ -2957,6 +2963,7 @@ static int mvneta_percpu_notifier(struct
- 			MVNETA_CAUSE_LINK_CHANGE |
- 			MVNETA_CAUSE_PSC_SYNC_CHANGE);
- 		netif_tx_start_all_queues(pp->dev);
-+		spin_unlock(&pp->lock);
- 		break;
- 	case CPU_DOWN_PREPARE:
- 	case CPU_DOWN_PREPARE_FROZEN:
-@@ -2981,7 +2988,9 @@ static int mvneta_percpu_notifier(struct
- 	case CPU_DEAD:
- 	case CPU_DEAD_FROZEN:
- 		/* Check if a new CPU must be elected now this on is down */
-+		spin_lock(&pp->lock);
- 		mvneta_percpu_elect(pp);
-+		spin_unlock(&pp->lock);
- 		/* Unmask all ethernet port interrupts */
- 		on_each_cpu(mvneta_percpu_unmask_interrupt, pp, true);
- 		mvreg_write(pp, MVNETA_INTR_MISC_MASK,
-@@ -3033,7 +3042,7 @@ static int mvneta_open(struct net_device
- 	 */
- 	on_each_cpu(mvneta_percpu_enable, pp, true);
- 
--
-+	pp->is_stopped = false;
- 	/* Register a CPU notifier to handle the case where our CPU
- 	 * might be taken offline.
- 	 */
-@@ -3066,9 +3075,18 @@ static int mvneta_stop(struct net_device
- {
- 	struct mvneta_port *pp = netdev_priv(dev);
- 
-+	/* Inform that we are stopping so we don't want to setup the
-+	 * driver for new CPUs in the notifiers
-+	 */
-+	spin_lock(&pp->lock);
-+	pp->is_stopped = true;
- 	mvneta_stop_dev(pp);
- 	mvneta_mdio_remove(pp);
- 	unregister_cpu_notifier(&pp->cpu_notifier);
-+	/* Now that the notifier are unregistered, we can release le
-+	 * lock
-+	 */
-+	spin_unlock(&pp->lock);
- 	on_each_cpu(mvneta_percpu_disable, pp, true);
- 	free_percpu_irq(dev->irq, pp->ports);
- 	mvneta_cleanup_rxqs(pp);
-@@ -3339,7 +3357,9 @@ static int  mvneta_config_rss(struct mvn
- 	mvreg_write(pp, MVNETA_PORT_CONFIG, val);
- 
- 	/* Update the elected CPU matching the new rxq_def */
-+	spin_lock(&pp->lock);
- 	mvneta_percpu_elect(pp);
-+	spin_unlock(&pp->lock);
- 
- 	/* We have to synchronise on the napi of each CPU */
- 	for_each_online_cpu(cpu) {