Re: [v2.6.34-stable 137/165] USB: Fix Corruption issue in USB ftdidriver ftdi_sio.c

[Paul Gortmaker]

On 12-08-17 10:36 AM, Herton Ronaldo Krzesinski wrote:
>> 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 <amworsley@xxxxxxxxx>
> [...]
> 
> 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.

Thanks Herton, I've queued this and pushed it to 34-longterm-queue.

Paul.
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