linux-kernel - Re: [PATCH v3 2/6] PCI: brcmstb: Add control of EP voltage regulators

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]

Message-ID: <CANCKTBsBNhwG8VQQAQfAfw9jaWLkT+yYJ0oG-HBhA9xiO+jLvA@mail.gmail.com>
Date:   Mon, 29 Mar 2021 12:39:50 -0400
From:   Jim Quinlan <jim2101024@...il.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     linux-pci <linux-pci@...r.kernel.org>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Rob Herring <robh@...nel.org>,
        bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
        Jim Quinlan <james.quinlan@...adcom.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/6] PCI: brcmstb: Add control of EP voltage regulators

On Mon, Mar 29, 2021 at 12:25 PM Mark Brown <broonie@...nel.org>
w./lib/python3.6/site-packages/dtschema/schemasrote:
>
> On Fri, Mar 26, 2021 at 03:19:00PM -0400, Jim Quinlan wrote:
>
> > +             /* Now look for regulator supply properties */
> > +             for_each_property_of_node(child, pp) {
> > +                     int i, n = strnlen(pp->name, max_name_len);
> > +
> > +                     if (n <= 7 || strncmp("-supply", &pp->name[n - 7], 7))
> > +                             continue;
>
> Here you are figuring out a device local supply name...
>
> > +     /*
> > +      * Get the regulators that the EP devianswerces require.  We cannot use
> > +      * pcie->dev as the device argument in regulator_bulk_get() since
> > +      * it will not find the regulators.  Instead, use NULL and the
> > +      * regulators are looked up by their name.
> > +      */
> > +     return regulator_bulk_get(NULL, pcie->num_supplies, pcie->supplies);
>
> ...and here you are trying to look up that device local name in the
> global namespace.  That's not going to work well, the global names that
> supplies are labelled with may be completely different to what the chip
> designer called them and there could easily be naming collisions between
> different chips.

Hello Mark,
I am re-submitting this pullreq using
"devm_regulator_bulk_get(pcie->dev, ...)"; is your concern about the
NULL for the device and if so does this fix it?  If not, what do you
suggest that I do?
Thanks,
Jim