Just fail abort and reset requests that come in after we've already
decided to remove a target.  This fixes a nasty crash if a storage
target goes away.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>