linux-kernel - [PATCH 1/1] Drivers:hv: Fix a bug in vmbus_driver

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Date:	Tue, 27 Dec 2011 13:49:37 -0800
From:	"K. Y. Srinivasan" <kys@...rosoft.com>
To:	gregkh@...e.de, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, virtualization@...ts.osdl.org,
	ohering@...e.com
Cc:	"K. Y. Srinivasan" <kys@...rosoft.com>,
	Fuzhou Chen <fuzhouch@...rosoft.com>,
	Sasha Levin <levinsasha928@...il.com>,
	stable <stable@...r.kernel.org>
Subject: [PATCH 1/1] 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@...rosoft.com>
Signed-off-by: Fuzhou Chen <fuzhouch@...rosoft.com>
Cc: Sasha Levin <levinsasha928@...il.com>
Cc: stable <stable@...r.kernel.org>
---
 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);
 
-- 
1.7.4.1

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