Re: [PATCH v4 4/4] tty: implement led triggers

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On Mon, 21 May 2018 10:33:58 +0200
Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> wrote:

> Hello Alan,
> 
> On Sun, May 20, 2018 at 08:24:51PM +0100, Alan Cox wrote:
> > > that is something I wouldn't care about. I think nobody will want to
> > > determine the transfer rate from the emitted light.  
> > 
> > More of a problem is that if you know the baud rate and have a camera you
> > can measure the number of bytes transmitted ?  
> 
> Do you really think this is a problem? Apart from not being reliable, if
> you have concerns don't configure the tty trigger, make sure your
> ethernet leds are off and nobody connects to the tty to read the
> original data.

I'm merely observing what it makes possible. Ethernet ones btw don't
seem to let you read the frame length in general.

I don't think it's an issue in normal use cases.


Alan



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