| | Date | Fri, 17 Aug 2012 11:36:44 -0300 | | From | Herton Ronaldo Krzesinski <> | | Subject | Re: [v2.6.34-stable 137/165] USB: Fix Corruption issue in USB ftdi driver ftdi_sio.c |
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On Wed, Aug 15, 2012 at 03:48:01PM -0400, Paul Gortmaker wrote: > From: Andrew Worsley <amworsley@gmail.com> > > ------------------- > This is a commit scheduled for the next v2.6.34 longterm release. > http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git > 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 <amworsley@gmail.com> [...]
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.
-- []'s Herton
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