linux-kernel - Re: [PATCH v2 5/6] usb: dwc3: exynos: Use devm_regulator_bulk_get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Thu, 4 Apr 2024 13:08:26 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Thinh Nguyen <Thinh.Nguyen@...opsys.com>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Alim Akhtar <alim.akhtar@...sung.com>, 
	Christophe JAILLET <christophe.jaillet@...adoo.fr>, Johan Hovold <johan@...nel.org>, 
	linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 5/6] usb: dwc3: exynos: Use devm_regulator_bulk_get_enable()
 helper function

Hi Krzysztof,

On Thu, 4 Apr 2024 at 12:53, Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 04/04/2024 09:13, Anand Moon wrote:
> > Use devm_regulator_bulk_get_enable() instead of open coded
> > 'devm_regulator_get(), regulator_enable(), regulator_disable().
>
> I fail to see how did you replace open-coded suspend/resume paths.
>
> >
> > Signed-off-by: Anand Moon <linux.amoon@...il.com>
> > ---
> > V2: no changes, did not find any regression in pm suspend/resume.
>
> No, that's not equivalent code. No explanation in commit msg.
>
> You already got comments on this and nothing improved. You just entirely
> ignored received comments. That's not how it works.
>
> I don't think you understand the code and Linux driver model. This patch
> repeats several previous attempts with similar issues: no logic behind a
> change.
>
> NAK.

devm_regulator_get_enable and devm_regulator_bulk_get_enable
both remove the dependency from the driver to handle the regulator_enabled
and regulator_disabled. ie this removes the regulator from the driver structure.

Since these functions set devm_add_action to disable the regulator when the
resource is not used.

     ret = devm_add_action(dev, devm_regulator_bulk_disable, devres);
     if (!ret)
               return 0;
>
> Best regards,
> Krzysztof
>

if you feel it's incorrect, I will drop this patch..

Thanks
-Anand