K 10
svn:author
V 3
erj
K 8
svn:date
V 27
2019-09-24T17:03:31.101304Z
K 7
svn:log
V 887
iflib: Remove redundant VLAN events deregistration

From Piotr:
r351152 introduced iflib_deregister() function calling
EVENTHANDLER_DEREGISTER() to unregister VLAN events. This patch removes
duplicate of EVENTHANDLER_DEREGISTER() calls placed in
iflib_device_deregister() as this function is now calling
iflib_deregister(). This is to avoid deregistering same event twice.

This patch also adds check in iflib_vlan_register() to prevent
registering VLAN while being in detach.

Patch co-authored by Krzysztof Galazka <krzysztof.galazka@intel.com>,
erj <erj@FreeBSD.org> and Jacob Keller <jacob.e.keller@intel.com>.

Signed-off-by: Piotr Pietruszewski <piotr.pietruszewski@intel.com>

Submitted by:	Piotr Pietruszewski <piotr.pietruszewski@intel.com>
Reviewed by:	gallatin@, erj@
MFC after:	3 days
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D21711

END