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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