[PATCH linux dev-4.10] fsi: core: Allow more BREAKs to recover a failing link

Andrew Jeffery andrew at aj.id.au
Mon Oct 30 15:04:46 AEDT 2017


On Mon, 2017-10-23 at 10:57 +0800, Jeremy Kerr wrote:
> Hi Chris,
> 
> > Recovering a failing FSI link can require more than a single
> > BREAK command to reset the FSI slave. Test results indicate
> > that communications can be restored when a second or third
> > BREAK is sent when the previous attempts fail.
> 
> This seems somewhat suspicious to me. Do we have any indication from the
> CFAM documentation, or the folks responsible for the CFAM implentation,
> that multiple breaks will actually cause any difference in behaviour
> that a single one? Or is this based only on experimentation?
> 
> I'm worried that we'd be papering-over the underlying issue here.
> 

Chris, my understanding is we're abandoning the approach in this patch.
Is that correct?

Andrew
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