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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-06-12 10:24:13 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-06-12 10:24:13 +0200
commitb06c0b2f087ab498d51d50f5ae353133b602f614 (patch)
tree08209ebe683ce27a9c7f755c8c05b853a407ca6f /drivers/base/power/runtime.c
parent2d5ed61ce9820a1fe7b076cc45c169524d767746 (diff)
downloadlinux-stericsson-b06c0b2f087ab498d51d50f5ae353133b602f614.tar.gz
Revert "PM / runtime: Fixup reference counting of device link suppliers at probe"
Revert commit 1e8378619841 (PM / runtime: Fixup reference counting of device link suppliers at probe), as it has introduced a regression and the condition it was designed to address should be covered by the existing code. Reported-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base/power/runtime.c')
-rw-r--r--drivers/base/power/runtime.c27
1 files changed, 24 insertions, 3 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index c6030f100c08..beb85c31f3fa 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -1563,16 +1563,37 @@ void pm_runtime_clean_up_links(struct device *dev)
}
/**
- * pm_runtime_resume_suppliers - Resume supplier devices.
+ * pm_runtime_get_suppliers - Resume and reference-count supplier devices.
* @dev: Consumer device.
*/
-void pm_runtime_resume_suppliers(struct device *dev)
+void pm_runtime_get_suppliers(struct device *dev)
{
+ struct device_link *link;
int idx;
idx = device_links_read_lock();
- rpm_get_suppliers(dev);
+ list_for_each_entry_rcu(link, &dev->links.suppliers, c_node)
+ if (link->flags & DL_FLAG_PM_RUNTIME)
+ pm_runtime_get_sync(link->supplier);
+
+ device_links_read_unlock(idx);
+}
+
+/**
+ * pm_runtime_put_suppliers - Drop references to supplier devices.
+ * @dev: Consumer device.
+ */
+void pm_runtime_put_suppliers(struct device *dev)
+{
+ struct device_link *link;
+ int idx;
+
+ idx = device_links_read_lock();
+
+ list_for_each_entry_rcu(link, &dev->links.suppliers, c_node)
+ if (link->flags & DL_FLAG_PM_RUNTIME)
+ pm_runtime_put(link->supplier);
device_links_read_unlock(idx);
}