b6422bc012
Check xchg returned value for queuing link down entry to guarantee proper atomic value reads. Fixes: 626c077c025f ("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>