Patch "bus: vexpress-config: fix device reference leak" has been added to the 4.9-stable tree

Patch "bus: vexpress-config: fix device reference leak" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    bus: vexpress-config: fix device reference leak

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     bus-vexpress-config-fix-device-reference-leak.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From c090959b9dd8c87703e275079aa4b4a824ba3f8e Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Wed, 16 Nov 2016 17:31:30 +0000
Subject: bus: vexpress-config: fix device reference leak

From: Johan Hovold <johan@kernel.org>

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>

---
 drivers/bus/vexpress-config.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/bus/vexpress-config.c
+++ b/drivers/bus/vexpress-config.c
@@ -171,6 +171,7 @@ static int vexpress_config_populate(stru
 {
 	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(stru
 	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)


Patches currently in stable-queue which might be from johan@kernel.org are

queue-4.9/usb-serial-ch341-fix-modem-control-and-b0-handling.patch
queue-4.9/powerpc-ibmebus-fix-further-device-reference-leaks.patch
queue-4.9/usb-serial-ch341-fix-control-message-error-handling.patch
queue-4.9/usb-serial-ch341-fix-open-and-resume-after-b0.patch
queue-4.9/usb-serial-ch341-fix-open-error-handling.patch
queue-4.9/usb-serial-ch341-fix-initial-modem-control-state.patch
queue-4.9/bus-vexpress-config-fix-device-reference-leak.patch
queue-4.9/powerpc-ibmebus-fix-device-reference-leaks-in-sysfs-interface.patch
queue-4.9/usb-serial-kl5kusb105-fix-line-state-error-handling.patch
queue-4.9/usb-serial-ch341-fix-resume-after-reset.patch