blkcg: make blkcg_policy_register() correctly handle cgroup_add_cftypes() failures
blkcg_policy_register() currently triggers WARN when
cgroup_add_cftypes() fails and proceeds, which is a rather crappy way
to handle errors. It was written that way as cgroup_add_cftypes()
itself didn't handle errors correctly. Now that cgroup_add_cftypes()
correctly handles errors in itself, let's handle its failure properly.
Remove the WARN_ON() and cancel and fail policy registration on
cgroup_add_cftypes() failure.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
1 file changed
