During channel context assignment, the interface should
be found by interface iteration, so we need to assign the
pointer before the channel context.
Reported-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Tested-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>