linux-hardening - Re: [PATCH v2 03/14] mfd: Add Microchip ZL3073x support

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Message-ID: <f6078f2b-4c40-4ede-8325-37a2f3e27565@redhat.com>
Date: Thu, 10 Apr 2025 20:36:07 +0200
From: Ivan Vecera <ivecera@...hat.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Krzysztof Kozlowski <krzk@...nel.org>, Andy Shevchenko <andy@...nel.org>,
 netdev@...r.kernel.org, Vadim Fedorenko <vadim.fedorenko@...ux.dev>,
 Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
 Jiri Pirko <jiri@...nulli.us>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Prathosh Satish <Prathosh.Satish@...rochip.com>,
 Lee Jones <lee@...nel.org>, Kees Cook <kees@...nel.org>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Michal Schmidt <mschmidt@...hat.com>, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2 03/14] mfd: Add Microchip ZL3073x support



On 10. 04. 25 7:50 odp., Andrew Lunn wrote:
> On Thu, Apr 10, 2025 at 09:52:39AM +0200, Ivan Vecera wrote:
>>
>>
>> On 10. 04. 25 9:19 dop., Krzysztof Kozlowski wrote:
>>> On 09/04/2025 17:43, Andy Shevchenko wrote:
>>>>> +/*
>>>>> + * Regmap range configuration
>>>>> + *
>>>>> + * The device uses 7-bit addressing and has 16 register pages with
>>>>> + * range 0x00-0x7f. The register 0x7f in each page acts as page
>>>>> + * selector where bits 0-3 contains currently selected page.
>>>>> + */
>>>>> +static const struct regmap_range_cfg zl3073x_regmap_ranges[] = {
>>>>> +	{
>>>>> +		.range_min	= 0,
>>>>
>>>> This still has the same issue, you haven't given a chance to me to reply
>>>> in v1 thread. I'm not going to review this as it's not settled down yet.
>>>> Let's first discuss the questions you have in v1.
>>>>
>>
>> Sorry for that but I don't understand where the issue is... Many drivers
>> uses this the same way.
>> E.g.
>> drivers/leds/leds-aw200xx.c
>> drivers/mfd/rsmu_i2c.c
>> sound/soc/codecs/tas2562.c
>> ...and many others
>>
>> All of them uses selector register that is present on all pages, wide range
>> for register access <0, num_pages*window_size> and window <0, window_size>
>>
>> Do they also do incorrectly or am I missing something?
> 
> The bigger point is, you should of asked this as part of the
> discussion on the previous version. You should not post a new version
> until all discussion has come to an end, you understand all the
> comments, or you have persuaded the commentor that the code is in fact
> correct.
> 
> Posting more versions without having that discussion just wastes
> reviewers/Maintainers time, and that is not what you want to do if you
> want to get your patch merged.
> 
> 	Andrew

Yeah, excuse me.

I'm very sorry for this impatience.

I.