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Date:   Wed, 29 Nov 2017 13:44:43 -0600
From:   Govinda Tatti <>
To:     Konrad Rzeszutek Wilk <>,
        Jan Beulich <>
Cc:     Juergen Gross <>,,
        Boris Ostrovsky <>,
Subject: Re: [Xen-devel] [PATCH] Xen/pciback: Implement PCI slot or bus reset
 with 'do_flr' SysFS attribute

Thanks Konrad for your response. Please see below for my comments.

>>>> Well, that's more a question to Konrad as the maintainer.
>>>> Personally I'd prefer just "reset", as "pci" is redundant and "bus"
>>> Can't do 'reset'.
>> Why?
> B/c I forgot that this attribute is not per device, but on the module sub-directory:
> /sys/bus/pci/drivers/pciback/do_flr
> It can be indeed called 'reset'.

Good.  We will rename sysfs attribute from "do_flr" to "reset"

>>>> doesn't cover the slot variant.
>>> 'bus_reset' sounds lovely?
>> Lovely sounding or not, it may end up misleading, and even more so
>> if - like asked for - FLR would be tried first.
> Fair enough. Reset should work then.
So, we will use the following sequence to reset the requested 

- FLR (as first option)
- BUS/SLOT reset (as fall-back option) if FLR is not supported or any 
issue with FLR


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