Patch "Drivers:hv: Fix a bug in vmbus_driver_unregister()" has been added to the 3.2-stable tree

Patch "Drivers:hv: Fix a bug in vmbus_driver_unregister()" has been added to the 3.2-stable tree

[gregkh]

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

    Drivers:hv: Fix a bug in vmbus_driver_unregister()

to the 3.2-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:
     drivers-hv-fix-a-bug-in-vmbus_driver_unregister.patch
and it can be found in the queue-3.2 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 8f257a142fc3868d69de3f996b95d7bdbc509560 Mon Sep 17 00:00:00 2001
From: "K. Y. Srinivasan" <kys@microsoft.com>
Date: Tue, 27 Dec 2011 13:49:37 -0800
Subject: Drivers:hv: Fix a bug in vmbus_driver_unregister()

From: "K. Y. Srinivasan" <kys@microsoft.com>

commit 8f257a142fc3868d69de3f996b95d7bdbc509560 upstream.

The function vmbus_exists() was introduced recently to deal with cases where
the vmbus driver failed to initialize and yet other Hyper-V drivers attempted
to register with the vmbus bus driver. This patch introduced a bug where
vmbus_driver_unregister() would fail to unregister the driver. This patch
fixes the problem.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Fuzhou Chen <fuzhouch@microsoft.com>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 drivers/hv/vmbus_drv.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -627,10 +627,7 @@ void vmbus_driver_unregister(struct hv_d
 	pr_info("unregistering driver %s\n", hv_driver->name);
 
 	if (!vmbus_exists())
-		return;
-
-	driver_unregister(&hv_driver->driver);
-
+		driver_unregister(&hv_driver->driver);
 }
 EXPORT_SYMBOL_GPL(vmbus_driver_unregister);
 


Patches currently in stable-queue which might be from kys@microsoft.com are

queue-3.2/drivers-hv-don-t-oops-when-you-cannot-init-vmbus.patch
queue-3.2/drivers-hv-fix-a-bug-in-vmbus_driver_unregister.patch