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Message-id: <1420792078-14132-2-git-send-email-k.kozlowski@samsung.com>
Date: Fri, 09 Jan 2015 09:27:58 +0100
From: Krzysztof Kozlowski <k.kozlowski@...sung.com>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>,
Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Krzysztof Kozlowski <k.kozlowski@...sung.com>
Subject: [PATCH 2/2] PM / QoS: Use lockdep asserts to find missing hold of
power.lock
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@...sung.com>
---
drivers/base/power/qos.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index a8fe4c1a8d07..e56d538d039e 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -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);
}
--
1.9.1
--
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