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af_iucv: fix race in __iucv_sock_wait()

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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@linux.vnet.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hendrik Brueckner 2009-09-16 04:37:25 +00:00 committed by David S. Miller
parent b29e4da41e
commit d9973179ae
1 changed files with 1 additions and 1 deletions
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2
net/iucv/af_iucv.c
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@ -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; \