Re: [PATCH] USB: ftdi_sio: Remove tty->low_latency.

[Eric W. Biederman]

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.

Any ideas from the people who understand this code?

Eric
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