Add supporting config snippetsampere-4.14

Change-Id: Ic2f7c31c8ad274f4c3677320b81ccb0407612711
Signed-off-by: Adrian Stratulat <adrian.stratulat@enea.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/patches/ipv4/0001-IPV4-unlock-rtnl_mutex-before-waiting-for-carrier-on.patch b/patches/ipv4/0001-IPV4-unlock-rtnl_mutex-before-waiting-for-carrier-on.patch
new file mode 100644
index 0000000..5133075
--- /dev/null
+++ b/patches/ipv4/0001-IPV4-unlock-rtnl_mutex-before-waiting-for-carrier-on.patch
@@ -0,0 +1,44 @@
+From 1828e68d8f0b99dbe388de4b6703afd90fdd7493 Mon Sep 17 00:00:00 2001
+From: Dragos Motrea <Dragos.Motrea@enea.com>
+Date: Thu, 16 Mar 2017 14:04:17 +0100
+Subject: [PATCH] IPV4: unlock rtnl_mutex before waiting for carrier on
+
+There is a race condition between ip auto configuration and the ethernet
+driver. The ip configuration is taking the rtnl_mutex in the ic_open_devs()
+function and then is waiting 120 seconds for a carrier on at least
+one network device. The driver is locked in the mutex and the carrier on
+is not sent. After 120 seconds, the mutex is unlocked and the driver is
+continuing its task execution.
+
+The mutex should be unlocked in the ip auto configuration before waiting the
+carrier on from the ethernet driver.
+
+Signed-off-by: Dragos Motrea <Dragos.Motrea@enea.com>
+---
+ net/ipv4/ipconfig.c | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
+index 071a785..55c95cc 100644
+--- a/net/ipv4/ipconfig.c
++++ b/net/ipv4/ipconfig.c
+@@ -254,6 +254,7 @@ static int __init ic_open_devs(void)
+                                 dev->name, able, d->xid);
+                }
+        }
++       rtnl_unlock();
+ 
+        /* no point in waiting if we could not bring up at least one device */
+        if (!ic_first_dev)
+@@ -281,8 +282,6 @@ static int __init ic_open_devs(void)
+                next_msg = jiffies + msecs_to_jiffies(CONF_CARRIER_TIMEOUT/12);
+        }
+ have_carrier:
+-       rtnl_unlock();
+-
+        *last = NULL;
+ 
+        if (!ic_first_dev) {
+-- 
+2.7.4
+