With a high speed cdc-acm device, I sometimes lose received data due to overruns in the tty buffer layer. Even though cdc-acm implements throttling, the throttle must be explicitly activated by the ldisc code. But before the ldisc becomes aware of received data, the data first go into tty_buffer.c. That buffer has a maximum size of 64 kB. A high speed device can fill it up before the ldisc even knows that something is going on. Is there any way I can solve this? The problem seems to be the weak coupling between hardware driver and ldisc. Would it be better to implement flow control between tty_buffer.c and the hardware driver, instead of between ldisc and hardware driver? Greetings, Joris. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
