[PATCH] con_close() deadlock fix

I'd assumed that vcs_remove_devfs() could not possibly take console_sem(). 
Seems I was wrong.

drivers/char/vt.c

@@ -2487,11 +2487,13 @@ static void con_close(struct tty_struct *tty, struct file *filp)
 	if (tty && tty->count == 1) {
 		struct vt_struct *vt;
 
-		vcs_remove_devfs(tty);
 		vt = tty->driver_data;
 		if (vt)
 			vc_cons[vt->vc_num].d->vc_tty = NULL;
 		tty->driver_data = 0;
+		release_console_sem();
+		vcs_remove_devfs(tty);
+		return;
 	}
 	release_console_sem();
 }