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path: root/drivers/base/power/opp/cpu.c
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Diffstat (limited to 'drivers/base/power/opp/cpu.c')
-rw-r--r--drivers/base/power/opp/cpu.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/base/power/opp/cpu.c b/drivers/base/power/opp/cpu.c
index 83d6e7ba1a34..8c3434bdb26d 100644
--- a/drivers/base/power/opp/cpu.c
+++ b/drivers/base/power/opp/cpu.c
@@ -211,7 +211,7 @@ int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev,
}
/* Mark opp-table as multiple CPUs are sharing it now */
- opp_table->shared_opp = true;
+ opp_table->shared_opp = OPP_TABLE_ACCESS_SHARED;
}
unlock:
mutex_unlock(&opp_table_lock);
@@ -227,7 +227,8 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_set_sharing_cpus);
*
* This updates the @cpumask with CPUs that are sharing OPPs with @cpu_dev.
*
- * Returns -ENODEV if OPP table isn't already present.
+ * Returns -ENODEV if OPP table isn't already present and -EINVAL if the OPP
+ * table's status is access-unknown.
*
* Locking: The internal opp_table and opp structures are RCU protected.
* Hence this function internally uses RCU updater strategy with mutex locks
@@ -249,9 +250,14 @@ int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
goto unlock;
}
+ if (opp_table->shared_opp == OPP_TABLE_ACCESS_UNKNOWN) {
+ ret = -EINVAL;
+ goto unlock;
+ }
+
cpumask_clear(cpumask);
- if (opp_table->shared_opp) {
+ if (opp_table->shared_opp == OPP_TABLE_ACCESS_SHARED) {
list_for_each_entry(opp_dev, &opp_table->dev_list, node)
cpumask_set_cpu(opp_dev->dev->id, cpumask);
} else {