[PATCH 4.4 63/86] tty: vt, return error when con_startup fails

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Jiri Slaby commit 6798df4c5fe0a7e6d2065cf79649a794e5ba7114 upstream. When csw->con_startup() fails in do_register_con_driver, we return no error (i.e. 0). This was changed back

[PATCH 4.4 63/86] tty: vt, return error when con_startup fails

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Jiri Slaby commit 6798df4c5fe0a7e6d2065cf79649a794e5ba7114 upstream. When csw->con_startup() fails in do_register_con_driver, we return no error (i.e. 0). This was changed back in 2006 by