[Xen-changelog] Watch may fire before we've allocated the interface structure.

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User cl349@xxxxxxxxxxxxxxxxxxxx
# Node ID 4ab607ca02c34dbc09f130bf53322b46a783fee6
# Parent  d3c0d85b7ef8c613e41a08caf8ced338671146b6
Watch may fire before we've allocated the interface structure.
Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>

diff -r d3c0d85b7ef8 -r 4ab607ca02c3 
linux-2.6-xen-sparse/drivers/xen/blkback/xenbus.c
--- a/linux-2.6-xen-sparse/drivers/xen/blkback/xenbus.c Wed Aug 24 20:29:42 2005
+++ b/linux-2.6-xen-sparse/drivers/xen/blkback/xenbus.c Wed Aug 24 20:43:16 2005
@@ -69,7 +69,7 @@
                device_unregister(&be->dev->dev);
                return;
        }
-       if (be->blkif->status == CONNECTED)
+       if (be->blkif == NULL || be->blkif->status == CONNECTED)
                return;
 
        err = xenbus_gather(be->frontpath, "grant-id", "%lu", &sharedmfn,

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