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Date: Tue, 6 Dec 2011 11:58:52 +0800
From: Wang YanQing <udknight@gmail.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: gregkh@suse.de, amworsley@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drivers:usb:serial:ftdi_sio.c: ftdi_set_termios make no
 sense some in a situation
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On Mon, Dec 05, 2011 at 11:34:24AM +0000, Alan Cox wrote:
> NACK
> 
> Think about what happens if you have two such ports or remove and re-add
> it.
> 
Alan, you are right! Thanks
> What code path is calling set_termios passing a termios data which has
> never been set ?
> 
> Alan

The question I meet is my usb-convertor base on FT232RL doesn't work, but it 
works well if I revert b1ffb4c851f185e9051ba837c16d9b84ef688d26.It seems that
I should dig deeper.