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Date: Sun, 15 Jan 2017 21:03:45 +0100 From: Lukas Wunner <lukas@...ner.de> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-kernel@...r.kernel.org Cc: Andreas Noever <andreas.noever@...il.com>, linux-pci@...r.kernel.org, linux-pm@...r.kernel.org, "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>, Ulf Hansson <ulf.hansson@...aro.org> Subject: [PATCH v5 4/8] Revert "PM / Runtime: Remove the exported function pm_children_suspended()" 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@...aro.org> Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.com> Signed-off-by: Lukas Wunner <lukas@...ner.de> --- 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 872eac4cb1df..03293c32793c 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 ca4823e675e2..7de2aa5c3692 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; } -- 2.11.0
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