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Date:   Thu, 27 Jul 2023 14:24:42 +0530
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Subject: Re: [EXTERNAL] Re: [EXTERNAL] Re: [EXTERNAL] Re: [PATCH v11 03/10]
 net: ti: icssg-prueth: Add Firmware config and classification APIs.
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To:     Simon Horman <simon.horman@corigine.com>
CC:     MD Danish Anwar <danishanwar@ti.com>,
        Randy Dunlap <rdunlap@infradead.org>,
        Roger Quadros <rogerq@kernel.org>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Andrew Lunn <andrew@lunn.ch>,
        Richard Cochran <richardcochran@gmail.com>,
        Conor Dooley <conor+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Eric Dumazet <edumazet@google.com>,
        "David S. Miller" <davem@davemloft.net>, <nm@ti.com>, <srk@ti.com>,
        <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <netdev@vger.kernel.org>, <linux-omap@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>
References: <20230724112934.2637802-1-danishanwar@ti.com>
 <20230724112934.2637802-4-danishanwar@ti.com> <ZL94/L1RMlU5TiAb@corigine.com>
 <b2016718-b8e4-a1f8-92ed-f0d9e3cb9c17@ti.com> <ZL99WfF7iuzeMP78@corigine.com>
 <5a4b293f-7729-ee03-2432-cd49ff92d809@ti.com> <ZMDOWecss/9F+0nb@corigine.com>
From:   "Anwar, Md Danish" <a0501179@ti.com>
In-Reply-To: <ZMDOWecss/9F+0nb@corigine.com>
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On 7/26/2023 1:12 PM, Simon Horman wrote:
> On Tue, Jul 25, 2023 at 01:28:21PM +0530, Md Danish Anwar wrote:
>> On 25/07/23 1:14 pm, Simon Horman wrote:
>>> On Tue, Jul 25, 2023 at 01:10:30PM +0530, Md Danish Anwar wrote:
>>>> Hi Simon,
>>>>
>>>> On 25/07/23 12:55 pm, Simon Horman wrote:
>>>>> On Mon, Jul 24, 2023 at 04:59:27PM +0530, MD Danish Anwar wrote:
>>>>>> Add icssg_config.h / .c and icssg_classifier.c files. These are firmware
>>>>>> configuration and classification related files. These will be used by
>>>>>> ICSSG ethernet driver.
>>>>>>
>>>>>> Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
>>>>>> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
>>>>>
>>>>> Hi Danish,
>>>>>
>>>>> some feedback from my side.
>>>>>
>>>>
>>>> Thanks for the feedback.
>>>>
>>>>> ...
>>>>>
>>>>>> diff --git a/drivers/net/ethernet/ti/icssg_classifier.c b/drivers/net/ethernet/ti/icssg_classifier.c
>>>>>
>>>>> ...
>>>>>
>>>>>> +void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac)
>>>>>
>>>>> This function appears to be unused.
>>>>> Perhaps it would be better placed in a later patch?
>>>>>
>>>>> Or perhaps not, if it makes it hard to split up the patches nicely.
>>>>> In which case, perhaps the __maybe_unused annotation could be added,
>>>>> temporarily.
>>>>>
>>>>
>>>> Due to splitting the patch into 8-9 patches, I had to introduce these helper
>>>> APIs earlier. All these APIs are helper APIs, they will be used in patch 6
>>>> (Introduce ICSSG Prueth driver).
>>>>
>>>> I had this concern that some APIs which will be used later but introduced
>>>> earlier can create some warnings, before splitting the patches.
>>>>
>>>> I had raised this concern in [1] and asked Jakub if it would be OK to introduce
>>>> these APIs earlier. Jakub said it would be fine [2], so I went ahead with this
>>>> approach.
>>>>
>>>> It will make very hard to break patches if these APIs are introduced and used
>>>> in same patch.
>>>
>>> Thanks, I understand.
>>>
>>> In that case my suggestion is to, temporarily, add __maybe_unused,
>>> which will allow static analysis tools to work more cleanly over the
>>> series. It is just a suggestion, not a hard requirement.
>>>
>>> Probably something along those lines applies to all the
>>> review I provided in my previous email. Please use your discretion here.
>>
>> For now I think I will leave it as it is. Let reviewers review all other
>> patches. Let's see if there are any other comments on all the patches in this
>> series. If there are any more comments on other patches, then while re-spinning
>> next revision I will keep this in mind and try to add __maybe_unused tags in
>> all APIs that are used later.
> 
> Sure, that sounds reasonable.
> 

I will be adding __maybe_unused tags to all the helper APIs introduced 
before the main driver patch. In the main driver patch I will be 
removing all those __maybe_unused tags and all the helper APIs will be 
back to their original name (without __maybe_unused tags)

>> The idea behind splitting the patches was to get them reviewed individually as
>> it is quite difficult to get one big patch reviewed as explained by Jakub. And
>> these warnings were expected. If there are any other comments on this series, I
>> will try to address all of them together in next revision.
> 
> Yes, I understand.
> Thanks for splitting things up into multiple patches.
> I know that is a lot of work. But it is very helpful.
> 
>> Meanwhile, Please let me know if you have any comments on other patches
>> in this series.
> 
> Will do, but I nothing to add at this time.

-- 
Thanks and Regards,
Md Danish Anwar