This reverts commit 62006c1702b3b1be0c0726949e0ee0ea2326be9c which
removed pm_children_suspended() because it had only a single caller.
We're about to add a second caller, so establish the status quo ante.
Cc: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
---
drivers/base/power/runtime.c | 3 +--
include/linux/pm_runtime.h | 7 +++++++
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 872eac4..03293c3 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -243,8 +243,7 @@ static int rpm_check_suspend_allowed(struct device *dev)
retval = -EACCES;
else if (atomic_read(&dev->power.usage_count) > 0)
retval = -EAGAIN;
- else if (!dev->power.ignore_children &&
- atomic_read(&dev->power.child_count))
+ else if (!pm_children_suspended(dev))
retval = -EBUSY;
/* Pending resume requests take precedence over suspends. */
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index ca4823e..7de2aa5c 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -66,6 +66,12 @@ static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
dev->power.ignore_children = enable;
}
+static inline bool pm_children_suspended(struct device *dev)
+{
+ return dev->power.ignore_children
+ || !atomic_read(&dev->power.child_count);
+}
+
static inline void pm_runtime_get_noresume(struct device *dev)
{
atomic_inc(&dev->power.usage_count);
@@ -161,6 +167,7 @@ static inline void pm_runtime_allow(struct device *dev) {}
static inline void pm_runtime_forbid(struct device *dev) {}
static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {}
+static inline bool pm_children_suspended(struct device *dev) { return false; }
static inline void pm_runtime_get_noresume(struct device *dev) {}
static inline void pm_runtime_put_noidle(struct device *dev) {}
static inline bool device_run_wake(struct device *dev) { return false; }
--
2.10.2
--
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