linux-kernel - Re: [PATCH v3 2/3] staging: iio: ad7780: update voltage on read

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: <20181103160618.wioq7jbdh4z5yqdw@renatolg>
Date:   Sat, 3 Nov 2018 13:06:19 -0300
From:   Renato Lui Geh <renatogeh@...il.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     "Ardelean, Alexandru" <alexandru.Ardelean@...log.com>,
        "lars@...afoo.de" <lars@...afoo.de>,
        "knaack.h@....de" <knaack.h@....de>,
        "Hennerich, Michael" <Michael.Hennerich@...log.com>,
        "renatogeh@...il.com" <renatogeh@...il.com>,
        "giuliano.belinassi@....br" <giuliano.belinassi@....br>,
        "pmeerw@...erw.net" <pmeerw@...erw.net>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "kernel-usp@...glegroups.com" <kernel-usp@...glegroups.com>
Subject: Re: [PATCH v3 2/3] staging: iio: ad7780: update voltage on read

On Thu, 1 Nov 2018 15:20:55 +0000
"Ardelean, Alexandru" <alexandru.Ardelean@...log.com> wrote:
>
> This looks wrong.
> I admit this was done in the same way in the probe function, but that looks
> a bit wrong as well.
>
> Typically, the return value of `regulator_get_voltage()` would get checked
> with:
>
> ret = regulator_get_voltage(st->reg);
> if (ret < 0)
>    return ret;
> *val = ret / 1000;
>
> So, negative values are errors and zero & positive values are valid voltage
> values.

I see. So -EINVAL is only used when sent the wrong info type?