Messages in this thread |  | | Date | Sat, 3 Oct 2009 14:09:02 +0100 | | From | Alan Cox <> | | Subject | Re: [PATCH] USB: ftdi_sio: Remove tty->low_latency. |
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On Fri, 02 Oct 2009 16:00:41 -0700 ebiederm@xmission.com (Eric W. Biederman) wrote:
> > > I have seen a hang in: > /bin/stty (changing the baud rate) > set_termios > tty_wait_until_sent > tty_chars_in_buffer > ftdi_chars_in_buffer > > Where the driver wedged for a serial port and no progress > was made. > > This happened to me several times with 2.6.31. My initial > hypothesis was this was a hardware error (as it only happened > on single piece of hardware). With all of the driver problems > I suspect it could be a driver bug.
Driver bug I would think - or setup. If you've genuinely got the port flow controlled then a request to set the termios after the I/O will wait until a signal or carrier change (or indeed forever) quite correctly.
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