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    SubjectRe: [v2.6.34-stable 137/165] USB: Fix Corruption issue in USB ftdi driver ftdi_sio.c
    On Wed, Aug 15, 2012 at 03:48:01PM -0400, Paul Gortmaker wrote:
    > From: Andrew Worsley <>
    > -------------------
    > This is a commit scheduled for the next v2.6.34 longterm release.
    > If you see a problem with using this for longterm, please comment.
    > -------------------
    > commit b1ffb4c851f185e9051ba837c16d9b84ef688d26 upstream.
    > Fix for ftdi_set_termios() glitching output
    > ftdi_set_termios() is constantly setting the baud rate, data bits and parity
    > unnecessarily on every call, . When called while characters are being
    > transmitted can cause the FTDI chip to corrupt the serial port bit stream
    > output by stalling the output half a bit during the output of a character.
    > Simple fix by skipping this setting if the baud rate/data bits/parity are
    > unchanged.
    > Signed-off-by: Andrew Worsley <>

    commit 108e02b12921078a59dcacd048079ece48a4a983 ("USB: ftdi_sio: fix
    initial baud rate") says it addresses a regression on this change,
    something to consider for inclusion with this update.


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