[RFC][PATCH v021 6/9] PM: EM: Call em_compute_costs() from em_create_perf_table()

["Rafael J. Wysocki" <rjw@rjwysocki.net>]

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

In preparation for subsequent changes, move the em_compute_costs()
invocation from em_create_perf_table() to em_create_pd() which is its
only caller.

This helps to prepare the EM registration code for handling the case in
which the :active_power() EM callback is NULL.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

v0.1 -> v0.2: Update changelog to explain what subsequent change depends
              on this patch.

---
 kernel/power/energy_model.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Index: linux-pm/kernel/power/energy_model.c
===================================================================
--- linux-pm.orig/kernel/power/energy_model.c
+++ linux-pm/kernel/power/energy_model.c
@@ -388,10 +388,6 @@ static int em_create_perf_table(struct d
 
 	em_init_performance(dev, pd, table, nr_states);
 
-	ret = em_compute_costs(dev, table, cb, nr_states, flags);
-	if (ret)
-		return -EINVAL;
-
 	return 0;
 }
 
@@ -434,6 +430,10 @@ static int em_create_pd(struct device *d
 	if (ret)
 		goto free_pd_table;
 
+	ret = em_compute_costs(dev, em_table->state, cb, nr_states, flags);
+	if (ret)
+		goto free_pd_table;
+
 	rcu_assign_pointer(pd->em_table, em_table);
 
 	if (_is_cpu_device(dev))