[Xen-changelog] [linux-2.6.18-xen] blkfront: Fix an unlikely xenbus crasher

["Xen patchbot-linux-2.6.18-xen" <patchbot-linux-2.6.18-xen@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1267437412 0
# Node ID 791c320be0ba3c1426c3c3a2fb3edd979fc4f8df
# Parent  2fc782287952cc8ee6f7c0768970d96fb566eef5
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@xxxxxxxxxx>
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
---
 drivers/xen/blkfront/blkfront.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletion(-)

diff -r 2fc782287952 -r 791c320be0ba drivers/xen/blkfront/blkfront.c
--- a/drivers/xen/blkfront/blkfront.c   Mon Mar 01 09:56:15 2010 +0000
+++ b/drivers/xen/blkfront/blkfront.c   Mon Mar 01 09:56:52 2010 +0000
@@ -286,8 +286,10 @@ static void backend_changed(struct xenbu
 
        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);

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