xenbus: don't free other end details too early

The individual drivers' remove functions could legitimately attempt to
access this information (for logging messages if nothing else). Note
that I did not in fact observe a problem anywhere, but I came across
this while looking into the reasons for what turned out to need the
fix at https://lkml.org/lkml/2012/3/5/336 to vsprintf().

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
index 3864967..b793723 100644 (file)
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -257,11 +257,12 @@ int xenbus_dev_remove(struct device *_dev)
        DPRINTK("%s", dev->nodename);
 
        free_otherend_watch(dev);
-       free_otherend_details(dev);
 
        if (drv->remove)
                drv->remove(dev);
 
+       free_otherend_details(dev);
+
        xenbus_switch_state(dev, XenbusStateClosed);
        return 0;
 }