kernel: add remaining kernel patch accidentally left out of r47963

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Backport of r47966

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@47967 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/generic/patches-3.18/081-06-ppp-don-t-set-sk_state-to-PPPOX_ZOMBIE-in-pppoe_disc.patch b/target/linux/generic/patches-3.18/081-06-ppp-don-t-set-sk_state-to-PPPOX_ZOMBIE-in-pppoe_disc.patch
index e69de29..8d155eb 100644 (file)
--- a/target/linux/generic/patches-3.18/081-06-ppp-don-t-set-sk_state-to-PPPOX_ZOMBIE-in-pppoe_disc.patch
+++ b/target/linux/generic/patches-3.18/081-06-ppp-don-t-set-sk_state-to-PPPOX_ZOMBIE-in-pppoe_disc.patch
@@ -0,0 +1,45 @@
+From: Guillaume Nault <g.nault@alphalink.fr>
+Date: Thu, 19 Nov 2015 12:52:56 +0100
+Subject: [PATCH] ppp: don't set sk_state to PPPOX_ZOMBIE in pppoe_disc_rcv()
+
+Since 287f3a943fef ("pppoe: Use workqueue to die properly when a PADT
+is received"), pppoe_disc_rcv() disconnects the socket by scheduling
+pppoe_unbind_sock_work(). This is enough to stop socket transmission
+and makes the PPPOX_ZOMBIE state uncessary.
+
+Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+
+--- a/drivers/net/ppp/pppoe.c
++++ b/drivers/net/ppp/pppoe.c
+@@ -500,27 +500,9 @@ static int pppoe_disc_rcv(struct sk_buff
+ 
+       pn = pppoe_pernet(dev_net(dev));
+       po = get_item(pn, ph->sid, eth_hdr(skb)->h_source, dev->ifindex);
+-      if (po) {
+-              struct sock *sk = sk_pppox(po);
+-
+-              bh_lock_sock(sk);
+-
+-              /* If the user has locked the socket, just ignore
+-               * the packet.  With the way two rcv protocols hook into
+-               * one socket family type, we cannot (easily) distinguish
+-               * what kind of SKB it is during backlog rcv.
+-               */
+-              if (sock_owned_by_user(sk) == 0) {
+-                      /* We're no longer connect at the PPPOE layer,
+-                       * and must wait for ppp channel to disconnect us.
+-                       */
+-                      sk->sk_state = PPPOX_ZOMBIE;
+-              }
+-
+-              bh_unlock_sock(sk);
++      if (po)
+               if (!schedule_work(&po->proto.pppoe.padt_work))
+-                      sock_put(sk);
+-      }
++                      sock_put(sk_pppox(po));
+ 
+ abort:
+       kfree_skb(skb);