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PM / QoS: Use lockdep asserts to find missing hold of power.lock

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Add lockdep asserts for holding the dev->power.lock to non-static
functions which require this. They could be used outside of the file so
asserts may help in detecting locking misuse.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Krzysztof Kozlowski 2015-01-09 09:27:58 +01:00 committed by Rafael J. Wysocki
parent f5f4eda4c9
commit f90b8ad83a
1 changed files with 4 additions and 0 deletions
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4
drivers/base/power/qos.c
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@ -64,6 +64,8 @@ enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask)
struct pm_qos_flags *pqf;
s32 val;
lockdep_assert_held(&dev->power.lock);
if (IS_ERR_OR_NULL(qos))
return PM_QOS_FLAGS_UNDEFINED;
@ -104,6 +106,8 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_flags);
*/
s32 __dev_pm_qos_read_value(struct device *dev)
{
lockdep_assert_held(&dev->power.lock);
return IS_ERR_OR_NULL(dev->power.qos) ?
0 : pm_qos_read_value(&dev->power.qos->resume_latency);
}