From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Wed, 8 Feb 2023 11:13:24 +0000 (+0100)
Subject: driver core: bus: clean up driver_find()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fb451966ae7d7e6d6802de39bda5fa2f15781244;p=linux.git

driver core: bus: clean up driver_find()

Convert the driver_find() function to use bus_to_subsys() and not use
the back-pointer to the private structure.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230208111330.439504-16-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 1040c724e50ca..98edc7aa4fc4f 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -1302,16 +1302,23 @@ EXPORT_SYMBOL_GPL(subsys_virtual_register);
  */
 struct device_driver *driver_find(const char *name, struct bus_type *bus)
 {
-	struct kobject *k = kset_find_obj(bus->p->drivers_kset, name);
+	struct subsys_private *sp = bus_to_subsys(bus);
+	struct kobject *k;
 	struct driver_private *priv;
 
-	if (k) {
-		/* Drop reference added by kset_find_obj() */
-		kobject_put(k);
-		priv = to_driver(k);
-		return priv->driver;
-	}
-	return NULL;
+	if (!sp)
+		return NULL;
+
+	k = kset_find_obj(sp->drivers_kset, name);
+	subsys_put(sp);
+	if (!k)
+		return NULL;
+
+	priv = to_driver(k);
+
+	/* Drop reference added by kset_find_obj() */
+	kobject_put(k);
+	return priv->driver;
 }
 EXPORT_SYMBOL_GPL(driver_find);