On Tue, 1 Nov 2016, Michael Schmitz wrote:

> Hi Finn,
> 
> Am 01.11.2016 um 12:47 schrieb Finn Thain:
> > 
> > On Tue, 1 Nov 2016, Michael Schmitz wrote:
> > 
> >>> I had tried to set that bit in zorro_esp_slave_configure but had not 
> >>> done a proper job of it - I'd only set esp->config3 and forgot to 
> >>> set tp->esp_config3. Time to retest this ...
> >>
> >> I don't think it's quite that easy - the ESP_CONFIG3_TENB bit needs 
> >> to be set for all targets if at least one SCSI-2 target is on the bus 
> >> and we allow dosconnecting, no?
> > 
> > I think ESP_CONFIG3_TENB is for FAS100A and FASHME. The bug here is on 
> > ESP236 and FAS236, so ESP_CONFIG3_TBMS would be the relevant bit.
> 
> I stand corrected. Err... confused.
> 
> When setting ESP_CONFIG3_TBMS, should we set ESP_CONFIG3_GTM as well?

I think that depends entirely on the target. But it isn't relevant to the 
bug at hand AFAICS.

-- 

> 
> > The bit gets set when ESP_CONFIG2_SCSI2ENAB gets set (as in David's 
> > patch) so we then need to avoid clobbering it, since ESP_CONFIG3_TBMS 
> > == ESP_CONFIG3_EWIDE. I think we have to test for HME to avoid this 
> > clash.
> 
> I'd want to set these bits for ESP236 and FAS236 only, so no clash with 
> HME. As you found out, ESP_CONFIG3_TBMS aka ESP_CONFIG3_EWIDE gets 
> clobbered on bus reset cleanup unconditionally.
> 
> Cheers,
> 
>       Michael
> 
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