linux-kernel - Re: [PATCH v2 1/3] mfd: core: Make a best effort attempt to match devices with the correct of

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Date:   Wed, 24 Jun 2020 10:51:33 -0500
From:   Frank Rowand <frowand.list@...il.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     andy.shevchenko@...il.com, michael@...le.cc, robh+dt@...nel.org,
        broonie@...nel.org, devicetree@...r.kernel.org,
        linus.walleij@...aro.org, linux@...ck-us.net,
        andriy.shevchenko@...ux.intel.com, robin.murphy@....com,
        gregkh@...uxfoundation.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] mfd: core: Make a best effort attempt to match
 devices with the correct of_nodes

On 2020-06-24 02:46, Lee Jones wrote:
> On Tue, 23 Jun 2020, Frank Rowand wrote:
> 
>> On 2020-06-23 14:59, Lee Jones wrote:


< big snip >

Thanks for the replies in the above portion.


>>>> But yes or no to my solution #2 (with some slight changes to
>>>> make it better (more gracious handling of the detected error) as
>>>> discussed elsewhere in the email thread)?
>>>
>>> Please see "[0]" above!
>>>
>>> AFAICT your solution #2 involves bombing out *all* devices if there is
>>> a duplicate compatible with no 'reg' property value.  This is a)
>>> over-kill and b) not an error, as I mentioned:
>>
>> As I mentioned above, I set you up to have this misunderstanding by
>> a mistake in one of my earlier emails.  So now that I have pointed
>> out what I meant here by "more gracious handling of the detected
>> error", what do you think of my amended solution #2?
> 
> Explained above, but the LT;DR is that it's not correct.

I don't agree with you, I think my solution is better.  Even if I
prefer my solution, I find your solution to be good enough.

So I am dropping my specific objection to returning -EAGAIN from
mfd_match_of_node_to_dev() when the node has previously been
allocated to a device.


> 
>>>>> It also suffers with false positives.
>>>
>>
>> Sorry for the very long response, but it seemed we were operating
>> under some different understandings and I hope I have clarified some
>> things.
> 
> Likewise. :)
>