linux-kernel - [PATCH 09/21] driver core: bus: bus_get

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Message-Id: <20230208111330.439504-10-gregkh@linuxfoundation.org>
Date:   Wed,  8 Feb 2023 12:13:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: [PATCH 09/21] driver core: bus: bus_get_kset() cleanup

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

Cc: "Rafael J. Wysocki" <rafael@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/base/bus.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index deed62509a62..90627c68d02b 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -956,7 +956,16 @@ void bus_notify(struct device *dev, enum bus_notifier_event value)
 
 struct kset *bus_get_kset(struct bus_type *bus)
 {
-	return &bus->p->subsys;
+	struct subsys_private *sp = bus_to_subsys(bus);
+	struct kset *kset;
+
+	if (!sp)
+		return NULL;
+
+	kset = &sp->subsys;
+	subsys_put(sp);
+
+	return kset;
 }
 EXPORT_SYMBOL_GPL(bus_get_kset);
 
-- 
2.39.1