From: Keir Fraser <keir.fraser@citrix.com>
Date: Mon, 1 Mar 2010 09:56:52 +0000 (+0000)
Subject: blkfront: Fix an unlikely xenbus crasher
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=2f2aad64b69230c528edff75f199a1a1bea03040;p=legacy%2Flinux-2.6.18-xen.git

blkfront: Fix an unlikely xenbus crasher

Getting partition 0 should not fail, but if it does we won't continue.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@novell.com>
---

diff --git a/drivers/xen/blkfront/blkfront.c b/drivers/xen/blkfront/blkfront.c
index 40d746d6..54b14408 100644
--- a/drivers/xen/blkfront/blkfront.c
+++ b/drivers/xen/blkfront/blkfront.c
@@ -286,8 +286,10 @@ static void backend_changed(struct xenbus_device *dev,
 
 	case XenbusStateClosing:
 		bd = bdget(info->dev);
-		if (bd == NULL)
+		if (bd == NULL) {
 			xenbus_dev_fatal(dev, -ENODEV, "bdget failed");
+			break;
+		}
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
 		down(&bd->bd_sem);