tree ae84d6ed1c97e77d536d0bcf2e25fa35d5cbfcba
parent 5aa2781d964e9835c441932110484bc454b5c207
author Mikulas Patocka <mpatocka@redhat.com> 1245661939 +0100
committer Alasdair G Kergon <agk@redhat.com> 1245661939 +0100

dm: remove EOPNOTSUPP for barriers

If the underlying device doesn't support barriers and dm receives a
barrier, it waits until all requests on that device drain so it no
longer needs to report -EOPNOTSUPP to the caller.

This patch deals with the confusing situation when moving a volume from
one physical device to another triggers an EOPNOTSUPP on a volume that
didn't report it before.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>