[Xen-changelog] Don't free subtype field unconditionally.

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

# HG changeset patch
# User cl349@xxxxxxxxxxxxxxxxxxxx
# Node ID 8d69cb2d4a8889780930fff0374559839fb6cdfb
# Parent  2f09b40595eafd845433d1a25366df59eeb4b6b2
Don't free subtype field unconditionally.
Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>

diff -r 2f09b40595ea -r 8d69cb2d4a88 
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c
--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c    Thu Aug 18 
19:06:51 2005
+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c    Thu Aug 18 
19:07:29 2005
@@ -262,7 +262,8 @@
        if (dev) {
                struct xenbus_device *xendev = to_xenbus_device(dev);
 
-               kfree(xendev->subtype);
+               if (xendev->subtype)
+                       kfree(xendev->subtype);
                kfree(xendev);
        }
 }

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