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

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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>

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This commit is contained in:

Philipp Reisner 2012-08-21 20:34:07 +02:00

parent 0ee98e2eb0

commit c1fd29a11f

2 changed files with 33 additions and 8 deletions

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27

drivers/block/drbd/drbd_int.h

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14

drivers/block/drbd/drbd_state.c

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