linux-kernel - [PATCH 4/6] driver core: Don't leak secondary fwnode on device removal

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Message-Id: <ef34b0d31d1fb9bc6a48a07d265fd103527b3f30.1469616641.git.lukas@wunner.de>
Date:	Wed, 27 Jul 2016 13:20:41 +0200
From:	Lukas Wunner <lukas@...ner.de>
To:	linux-efi@...r.kernel.org, Matt Fleming <matt@...eblueprint.co.uk>,
	linux-kernel@...r.kernel.org
Cc:	Andreas Noever <andreas.noever@...il.com>,
	Pierre Moreau <pierre.morrow@...e.fr>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 4/6] driver core: Don't leak secondary fwnode on device
 removal

If device_add_property_set() is called for a device, a secondary fwnode
is allocated and assigned to the device but currently not freed once the
device is removed.

This can be triggered on Apple Macs if a Thunderbolt device is plugged
in on boot since Apple's NHI EFI driver sets a number of properties for
that device which are leaked on unplug.

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Cc: Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Andreas Noever <andreas.noever@...il.com>
Signed-off-by: Lukas Wunner <lukas@...ner.de>
---
 drivers/base/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 0a8bdad..70c5be5 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1266,6 +1266,7 @@ void device_del(struct device *dev)
 	bus_remove_device(dev);
 	device_pm_remove(dev);
 	driver_deferred_probe_del(dev);
+	device_remove_properties(dev);
 
 	/* Notify the platform of the removal, in case they
 	 * need to do anything...
-- 
2.8.1