IB/hfi1: Check xchg returned value for queuing link down entry
Check xchg returned value for queuing link down entry
to guarantee proper atomic value reads.
Fixes: 0dad968b63e3 ("IB/hfi1: Prevent link down request double queuing") Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>