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staging: lustre: nrs: serialize executions of nrs_policy_stop
Do not release nrs_lock in nrs_policy_stop0 to prevent op_policy_stop() from being executed concurrently. Signed-off-by: Henri Doreau <henri.doreau@cea.fr> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7096 Reviewed-on: http://review.whamcloud.com/16214 Reviewed-by: Lai Siyao <lai.siyao@intel.com> Reviewed-by: Emoly Liu <emoly.liu@intel.com> Reviewed-by: Oleg Drokin <oleg.drokin@intel.com> Signed-off-by: James Simmons <jsimmons@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -82,16 +82,9 @@ static int nrs_policy_ctl_locked(struct ptlrpc_nrs_policy *policy,
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static void nrs_policy_stop0(struct ptlrpc_nrs_policy *policy)
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{
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struct ptlrpc_nrs *nrs = policy->pol_nrs;
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if (policy->pol_desc->pd_ops->op_policy_stop) {
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spin_unlock(&nrs->nrs_lock);
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if (policy->pol_desc->pd_ops->op_policy_stop)
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policy->pol_desc->pd_ops->op_policy_stop(policy);
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spin_lock(&nrs->nrs_lock);
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}
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LASSERT(list_empty(&policy->pol_list_queued));
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LASSERT(policy->pol_req_queued == 0 &&
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policy->pol_req_started == 0);
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@ -619,11 +612,8 @@ static int nrs_policy_ctl(struct ptlrpc_nrs *nrs, char *name,
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goto out;
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}
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/**
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* Wait for the policy to be fully started before attempting
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* to operate it.
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*/
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if (policy->pol_state == NRS_POL_STATE_STARTING) {
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if (policy->pol_state != NRS_POL_STATE_STARTED &&
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policy->pol_state != NRS_POL_STATE_STOPPED) {
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rc = -EAGAIN;
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goto out;
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}
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