module: Ensure a module's state is set accordingly during module coming cleanup code

In load_module() in the event of an error, for e.g. unknown module
parameter(s) specified we go to perform some module coming clean up
operations. At this point the module is still in a "formed" state
when it is actually going away.

This patch updates the module's state accordingly to ensure anyone on the
module_notify_list waiting for a module going away notification will be
notified accordingly.

Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Link: http://lkml.kernel.org/r/1476980293-19062-2-git-send-email-atomlin@redhat.com
Signed-off-by: Jessica Yu <jeyu@redhat.com>

kernel/module.c

@@ -3697,6 +3697,7 @@ static int load_module(struct load_info *info, const char __user *uargs,
  sysfs_cleanup:
 	mod_sysfs_teardown(mod);
  coming_cleanup:
+	mod->state = MODULE_STATE_GOING;
 	blocking_notifier_call_chain(&module_notify_list,
 				     MODULE_STATE_GOING, mod);
 	klp_module_going(mod);