IB/hfi1: Insure freeze_work work_struct is canceled on shutdown
By code inspection, the freeze_work is never canceled. Fix by adding a cancel_work_sync in the shutdown path to insure it is no longer running. Fixes: 77241056 ("IB/hfi1: add driver files") Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com> Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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