bus: vexpress-config: fix device reference leak

commit c090959b9dd8c87703e275079aa4b4a824ba3f8e upstream.

Make sure to drop the reference to the parent device taken by
class_find_device() after populating the bus.

Fixes: 3b9334ac835b ("mfd: vexpress: Convert custom func API to regmap")
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/bus/vexpress-config.c b/drivers/bus/vexpress-config.c
index 9efdf1de4035..493e7b9fc813 100644
--- a/drivers/bus/vexpress-config.c
+++ b/drivers/bus/vexpress-config.c
@@ -171,6 +171,7 @@ static int vexpress_config_populate(struct device_node *node)
 {
         struct device_node *bridge;
         struct device *parent;
+        int ret;
 
         bridge = of_parse_phandle(node, "arm,vexpress,config-bridge", 0);
         if (!bridge)
@@ -182,7 +183,11 @@ static int vexpress_config_populate(struct device_node *node)
         if (WARN_ON(!parent))
                 return -ENODEV;
 
-        return of_platform_populate(node, NULL, NULL, parent);
+        ret = of_platform_populate(node, NULL, NULL, parent);
+
+        put_device(parent);
+
+        return ret;
 }
 
 static int __init vexpress_config_init(void)