patch "Drivers:hv: Fix a bug in vmbus_driver_unregister()" added to driver-core tree

patch "Drivers:hv: Fix a bug in vmbus_driver_unregister()" added to driver-core 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 my driver-core git tree which can be found at
    git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git
in the driver-core-next branch.

The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)

The patch will be merged to Linus's tree in the next big merge window after
the next kernel is released.

If you have any questions about this process, please let me know.


>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()

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>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/hv/vmbus_drv.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index c3875f7..a220e57 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -627,10 +627,7 @@ void vmbus_driver_unregister(struct hv_driver *hv_driver)
 	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);
 
-- 
1.7.8