Hi Rob, I'm trying to boot my Rockchip RK3368 platform with linux-next, 20160909, and find the console is broken. After doing bisect and reverting your commit 761ed4a94582 ("tty: serial_core: convert uart_close to use tty_port_close"), it seems to work again. I don't have too much knowledge about tty, so I think I could help you test if you have any idea. The uart I am using now is compatible of "rockchip, rk3368-uart", "snps,dw-apb-uart". -- Best Regards Shawn Lin -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html