tree 8d749aa26634287fe59fba8fe181b0f43f36af1a
parent 0778286a133d2d3f81861a4e5db308e359583006
author Lars Ellenberg <lars.ellenberg@linbit.com> 1283327423 +0200
committer Philipp Reisner <philipp.reisner@linbit.com> 1287074307 +0200

drbd: fix race between deconfiguring and reconfiguring network

If a drbd_nl_net_conf hits the small window between the state change
to C_STANDALONE and the corresponding cleanup in after_state_ch,
that cleanup would throw away stuff we now need again,
and later trigger BUG_ON()s.

Fixed by properly serializing the new config request with
any pending cleanup.

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