Re: Handshaking on USB serial devices

From: Greg KH
Date: Thu Feb 14 2008 - 00:00:51 EST


On Thu, Feb 14, 2008 at 01:15:37AM +1030, David Newall wrote:
> Consider a USB-attached serial port that is set to do RTS/CTS (or
> DSR/DTR) handshaking: What stops the kernel sending more data to it when
> the remote end lowers CTS (or DTR)?

The tty layer should look at the proper flags and not send data on to
the driver in this kind of instance.

Is this not happening properly for you? If so, which USB serial driver?

thanks,

greg k-h
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/