linux-kernel - Re: Issue with imx_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]

Message-ID: <CAOMZO5BniszDhWKkoWY=P62kv9cY160r9P=pjpbSOZasxJvdBA@mail.gmail.com>
Date:   Tue, 3 Dec 2019 10:13:11 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Marco Felsch <m.felsch@...gutronix.de>
Cc:     Igor Plyatov <plyatov@...il.com>, Zhang Rui <rui.zhang@...el.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amit.kucheria@...durent.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>, linux-pm@...r.kernel.org,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Issue with imx_get_temp()

On Tue, Dec 3, 2019 at 9:04 AM Fabio Estevam <festevam@...il.com> wrote:
>
> Hi Marco,
>
> On Tue, Dec 3, 2019 at 7:15 AM Marco Felsch <m.felsch@...gutronix.de> wrote:
>
> > Mh.. it seems that the irq gets enabled before a irq-handler is
> > registered. As your backlog shows the thermal_zone_device_register()
> > triggers a imx_get_temp() and during boot the irq_enabled is false and
> > it seems that your temperature is below the alarm_temp. So in such a
> > case the enable_irq() is executed. I don't know what happens if we
> > enable a irq without a irq-handler.
>
> I think your analysis makes sense.
>
> Should we move the ' data->irq_enabled = true' just prior to calling
> thermal_zone_device_register()?

Or maybe we could call thermal_zone_device_register() later?

Igor,

Does the following patch help?
http://code.bulix.org/l3rz2e-982595