drbd: drbd_adm_prepare(): Only set adm_ctx.connection when a connection is requested

Also change drbd_adm_connect() to expect a resource after it requested one.

Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
1 file changed