tree d297c9ee730f292a2a789f9bbeceffde075afc26
parent 0ee98e2eb0c85f27b6f24a15d59fb54f99a93840
author Philipp Reisner <philipp.reisner@linbit.com> 1345574047 +0200
committer Philipp Reisner <philipp.reisner@linbit.com> 1352466500 +0100

drbd: Fix a race condition that can lead to a BUG()

If the preconditions for a state change change after the wait_event() we
might hit the BUG() statement in conn_set_state().

With holding the spin_lock while evaluating the condition AND until the
actual state change we ensure the the preconditions can not change anymore.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>