[PATCH 5.15 163/230] PM: runtime: Redefine pm_runtime_release_supplier()

Greg Kroah-Hartman
2022-07-11T09:57:00Z

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

commit 07358194badf73e267289b40b761f5dc56928eab upstream.

Instead of passing an extra bool argument to pm_runtime_release_supplier(),
make its callers take care of triggering a runtime-suspend of the
supplier device as needed.

No expected functional impact.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: 5.1+ <stable@vger.kernel.org> # 5.1+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/base/core.c | 3 ++-
drivers/base/power/runtime.c | 20 +++++++++-----------
include/linux/pm_runtime.h | 5 ++---
3 files changed, 13 insertions(+), 15 deletions(-)

--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -485,7 +485,8 @@ static void device_link_release_fn(struc
/* Ensure that all references to the link object have been dropped. */
device_link_synchronize_removal();

- pm_runtime_release_supplier(link, true);
+ pm_runtime_release_supplier(link);
+ pm_request_idle(link->supplier);

put_device(link->consumer);
put_device(link->supplier);
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -308,13 +308,10 @@ static int rpm_get_suppliers(struct devi
/**
* pm_runtime_release_supplier - Drop references to device link's supplier.
* @link: Target device link.
- * @check_idle: Whether or not to check if the supplier device is idle.
*
- * Drop all runtime PM references associated with @link to its supplier device
- * and if @check_idle is set, check if that device is idle (and so it can be
- * suspended).
+ * Drop all runtime PM references associated with @link to its supplier device.
*/
-void pm_runtime_release_supplier(struct device_link *link, bool check_idle)
+void pm_runtime_release_supplier(struct device_link *link)
{
struct device *supplier = link->supplier;

@@ -327,9 +324,6 @@ void pm_runtime_release_supplier(struct
while (refcount_dec_not_one(&link->rpm_active) &&
atomic_read(&supplier->power.usage_count) > 0)
pm_runtime_put_noidle(supplier);
-
- if (check_idle)
- pm_request_idle(supplier);
}

static void __rpm_put_suppliers(struct device *dev, bool try_to_suspend)
@@ -337,8 +331,11 @@ static void __rpm_put_suppliers(struct d
struct device_link *link;

list_for_each_entry_rcu(link, &dev->links.suppliers, c_node,
- device_links_read_lock_held())
- pm_runtime_release_supplier(link, try_to_suspend);
+ device_links_read_lock_held()) {
+ pm_runtime_release_supplier(link);
+ if (try_to_suspend)
+ pm_request_idle(link->supplier);
+ }
}

static void rpm_put_suppliers(struct device *dev)
@@ -1791,7 +1788,8 @@ void pm_runtime_drop_link(struct device_
return;

pm_runtime_drop_link_count(link->consumer);
- pm_runtime_release_supplier(link, true);
+ pm_runtime_release_supplier(link);
+ pm_request_idle(link->supplier);
}

static bool pm_runtime_need_not_resume(struct device *dev)
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -58,7 +58,7 @@ extern void pm_runtime_get_suppliers(str
extern void pm_runtime_put_suppliers(struct device *dev);
extern void pm_runtime_new_link(struct device *dev);
extern void pm_runtime_drop_link(struct device_link *link);
-extern void pm_runtime_release_supplier(struct device_link *link, bool check_idle);
+extern void pm_runtime_release_supplier(struct device_link *link);

extern int devm_pm_runtime_enable(struct device *dev);

@@ -284,8 +284,7 @@ static inline void pm_runtime_get_suppli
static inline void pm_runtime_put_suppliers(struct device *dev) {}
static inline void pm_runtime_new_link(struct device *dev) {}
static inline void pm_runtime_drop_link(struct device_link *link) {}
-static inline void pm_runtime_release_supplier(struct device_link *link,
- bool check_idle) {}
+static inline void pm_runtime_release_supplier(struct device_link *link) {}

#endif /* !CONFIG_PM */