Bluetooth: l2cap: Fix lost wakeup waiting for ERTM acks

Fix race condition which can result in missing wakeup during
l2cap socket shutdown.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 3204ba8a701c..b3bdb482bbe6 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -1159,9 +1159,8 @@ int __l2cap_wait_ack(struct sock *sk)
         int timeo = HZ/5;
 
         add_wait_queue(sk_sleep(sk), &wait);
-        while ((chan->unacked_frames > 0 && chan->conn)) {
-                set_current_state(TASK_INTERRUPTIBLE);
-
+        set_current_state(TASK_INTERRUPTIBLE);
+        while (chan->unacked_frames > 0 && chan->conn) {
                 if (!timeo)
                         timeo = HZ/5;
 
@@ -1173,6 +1172,7 @@ int __l2cap_wait_ack(struct sock *sk)
                 release_sock(sk);
                 timeo = schedule_timeout(timeo);
                 lock_sock(sk);
+                set_current_state(TASK_INTERRUPTIBLE);
 
                 err = sock_error(sk);
                 if (err)