From: Hendrik Brueckner <brueckner@xxxxxxxxxxxxxxxxxx>
Moving prepare_to_wait before the condition to avoid a race between
schedule_timeout and wake up.
The race can appear during iucv_sock_connect() and iucv_callback_connack().
Signed-off-by: Hendrik Brueckner <brueckner@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Ursula Braun <ursula.braun@xxxxxxxxxx>
---
net/iucv/af_iucv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux-2.6-uschi/net/iucv/af_iucv.c
===================================================================
--- linux-2.6-uschi.orig/net/iucv/af_iucv.c
+++ linux-2.6-uschi/net/iucv/af_iucv.c
@@ -59,8 +59,8 @@ do { \
DEFINE_WAIT(__wait); \
long __timeo = timeo; \
ret = 0; \
+ prepare_to_wait(sk->sk_sleep, &__wait, TASK_INTERRUPTIBLE); \
while (!(condition)) { \
- prepare_to_wait(sk->sk_sleep, &__wait, TASK_INTERRUPTIBLE); \
if (!__timeo) { \
ret = -EAGAIN; \
break; \
--
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