mvebu: remove linux 4.4 support

[openwrt/staging/lynxis/omap.git] / target / linux / mvebu / patches-4.4 / 038-net-mvneta-Fix-the-CPU-choice-in-mvneta_percpu_elect.patch

diff --git a/target/linux/mvebu/patches-4.4/038-net-mvneta-Fix-the-CPU-choice-in-mvneta_percpu_elect.patch b/target/linux/mvebu/patches-4.4/038-net-mvneta-Fix-the-CPU-choice-in-mvneta_percpu_elect.patch
deleted file mode 100644 (file)
index 4fc9ccc..0000000
--- a/target/linux/mvebu/patches-4.4/038-net-mvneta-Fix-the-CPU-choice-in-mvneta_percpu_elect.patch
+++ /dev/null
@@ -1,57 +0,0 @@
-From: Gregory CLEMENT <gregory.clement@free-electrons.com>
-Date: Thu, 4 Feb 2016 22:09:24 +0100
-Subject: [PATCH] net: mvneta: Fix the CPU choice in mvneta_percpu_elect
-
-When passing to the management of multiple RX queue, the
-mvneta_percpu_elect function was broken. The use of the modulo can lead
-to elect the wrong cpu. For example with rxq_def=2, if the CPU 2 goes
-offline and then online, we ended with the third RX queue activated in
-the same time on CPU 0 and CPU2, which lead to a kernel crash.
-
-With this fix, we don't try to get "the closer" CPU if the default CPU is
-gone, now we just use CPU 0 which always be there. Thanks to this, the
-code becomes more readable, easier to maintain and more predicable.
-
-Cc: stable@vger.kernel.org
-Fixes: 2dcf75e2793c ("net: mvneta: Associate RX queues with each CPU")
-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
-@@ -2847,9 +2847,14 @@ static void mvneta_percpu_disable(void *
- 
- static void mvneta_percpu_elect(struct mvneta_port *pp)
- {
--      int online_cpu_idx, max_cpu, cpu, i = 0;
-+      int elected_cpu = 0, max_cpu, cpu, i = 0;
-+
-+      /* 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.
-+       */
-+      if (cpu_online(pp->rxq_def))
-+              elected_cpu = pp->rxq_def;
- 
--      online_cpu_idx = pp->rxq_def % num_online_cpus();
-       max_cpu = num_present_cpus();
- 
-       for_each_online_cpu(cpu) {
-@@ -2860,7 +2865,7 @@ static void mvneta_percpu_elect(struct m
-                       if ((rxq % max_cpu) == cpu)
-                               rxq_map |= MVNETA_CPU_RXQ_ACCESS(rxq);
- 
--              if (i == online_cpu_idx)
-+              if (cpu == elected_cpu)
-                       /* Map the default receive queue queue to the
-                        * elected CPU
-                        */
-@@ -2871,7 +2876,7 @@ static void mvneta_percpu_elect(struct m
-                * the CPU bound to the default RX queue
-                */
-               if (txq_number == 1)
--                      txq_map = (i == online_cpu_idx) ?
-+                      txq_map = (cpu == elected_cpu) ?
-                               MVNETA_CPU_TXQ_ACCESS(1) : 0;
-               else
-                       txq_map = mvreg_read(pp, MVNETA_CPU_MAP(cpu)) &