On 04/29/2016 05:58 AM, Geert Uytterhoeven wrote: > Documentation/serial/driver clearly states: > > If the port does not support CTS, DCD or DSR, the driver should > indicate that the signal is permanently active. > > Hence always set TIOCM_CTS, as we currently don't look at the CTS > hardware line state at all. > > FWIW, this fixes the transmit path when hardware-assisted flow control > is enabled, and userspace enables CRTSCTS. > The receive path is still broken, as RTS is never asserted. Reviewed-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>