IB/hfi1: Fix missing lock/unlock in verbs drain callback
The iowait_sdma_drained() callback lacked locking to protect the qp s_flags field. This causes the s_flags to be out of sync on multiple CPUs, potentially corrupting the s_flags. Fixes: a545f530 ("staging/rdma/hfi: fix CQ completion order issue") Reviewed-by:Sebastian Sanchez <sebastian.sanchez@intel.com> Signed-off-by:
Mike Marciniszyn <mike.marciniszyn@intel.com> Reviewed-by:
Leon Romanovsky <leonro@mellanox.com> Signed-off-by:
Doug Ledford <dledford@redhat.com>
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