driver core: bus: move bus notifier logic into bus.c

The logic to touch the bus notifier was open-coded in numberous places
in the driver core.  Clean that up by creating a local bus_notify()
function and have everyone call this function instead, making the
reading of the caller code simpler and easier to maintain over time.

Reviewed-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230111092331.3946745-2-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 428c26c6b615..cf1b8f00b4c0 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -850,6 +850,14 @@ int bus_unregister_notifier(struct bus_type *bus, struct notifier_block *nb)
 }
 EXPORT_SYMBOL_GPL(bus_unregister_notifier);
 
+void bus_notify(struct device *dev, enum bus_notifier_event value)
+{
+	struct bus_type *bus = dev->bus;
+
+	if (bus)
+		blocking_notifier_call_chain(&bus->p->bus_notifier, value, dev);
+}
+
 struct kset *bus_get_kset(struct bus_type *bus)
 {
 	return &bus->p->subsys;