Perhaps this should even be further generalized (e.g. to remove any
"[!/]*:" pattern prefixes) to be more forward compatible?

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- a/tools/hotplug/Linux/blktap	2010-02-16 18:06:25.000000000 +0100
+++ b/tools/hotplug/Linux/blktap	2010-04-16 11:46:29.000000000 +0200
@@ -59,6 +59,7 @@
 if [ -n "$t" ]
 then
     p=$(xenstore_read "$XENBUS_PATH/params")
+    p=${p#tapdisk:}
     # if we have a ':', chew from head including :
     if echo $p | grep -q \:
     then