From: Dexuan Cui <decui@microsoft.com>
Date: Tue, 14 Nov 2017 13:53:32 +0000 (-0700)
Subject: vmbus: unregister device_obj->channels_kset
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=869b5567e12f63ea7407f81728ca87f8c0abbfdb;p=linux.git

vmbus: unregister device_obj->channels_kset

Without the patch, a device can't be thoroughly destroyed, because
vmbus_device_register() -> kset_create_and_add() still holds a reference
to the hv_device's device.kobj.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Fixes: c2e5df616e1a ("vmbus: add per-channel sysfs info")
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 76ed9a216f101..610223f0e9453 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1378,6 +1378,8 @@ void vmbus_device_unregister(struct hv_device *device_obj)
 	pr_debug("child device %s unregistered\n",
 		dev_name(&device_obj->device));
 
+	kset_unregister(device_obj->channels_kset);
+
 	/*
 	 * Kick off the process of unregistering the device.
 	 * This will call vmbus_remove() and eventually vmbus_device_release()