Commit a27d26af authored Feb 21, 2020 by Saravana Kannan

UPSTREAM: driver core: Skip unnecessary work when device doesn't have sync_state()



A bunch of busy work is done for devices that don't have sync_state()
support. Stop doing the busy work.

Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20200221080510.197337-4-saravanak@google.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 77036165d8bcf7c7b2a2df28a601ec2c52bb172d)
Bug: 151865289
Change-Id: Id513185be93c036150ffd7156104f898fec70c11

parent 401eeccd

drivers/base/core.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -722,6 +722,8 @@ static void __device_links_queue_sync_state(struct device *dev,
		{
		struct device_link *link;

		if (!dev_has_sync_state(dev))
		return;
		if (dev->state_synced)
		return;

		@@ -823,7 +825,7 @@ late_initcall(sync_state_resume_initcall);

		static void __device_links_supplier_defer_sync(struct device *sup)
		{
		if (list_empty(&sup->links.defer_sync))
		if (list_empty(&sup->links.defer_sync) && dev_has_sync_state(sup))
		list_add_tail(&sup->links.defer_sync, &deferred_sync);
		}