linux-kernel - Re: [PATCH v10 1/9] device property: Add remote endpoint to devcon matcher

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: <Y8GXhhYY9a7Z/t9H@smile.fi.intel.com>
Date:   Fri, 13 Jan 2023 19:40:22 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Prashant Malani <pmalani@...omium.org>
Cc:     Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Pin-yen Lin <treapking@...omium.org>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Daniel Scally <djrscally@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Benson Leung <bleung@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Nícolas F . R . A . Prado 
        <nfraprado@...labora.com>, Marek Vasut <marex@...x.de>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Javier Martinez Canillas <javierm@...hat.com>,
        Lyude Paul <lyude@...hat.com>, chrome-platform@...ts.linux.dev,
        Xin Ji <xji@...logixsemi.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        linux-kernel@...r.kernel.org, Allen Chen <allen.chen@....com.tw>,
        linux-acpi@...r.kernel.org, Hsin-Yi Wang <hsinyi@...omium.org>,
        Chen-Yu Tsai <wenst@...omium.org>
Subject: Re: [PATCH v10 1/9] device property: Add remote endpoint to devcon
 matcher

On Thu, Jan 12, 2023 at 02:31:45PM -0800, Prashant Malani wrote:
> On Thu, Jan 12, 2023 at 5:32 AM Sakari Ailus
> <sakari.ailus@...ux.intel.com> wrote:
> > On Thu, Jan 12, 2023 at 12:20:56PM +0800, Pin-yen Lin wrote:
> > > From: Prashant Malani <pmalani@...omium.org>

...

> > > +             /*
> > > +              * Some drivers may register devices for endpoints. Check
> > > +              * the remote-endpoints for matches in addition to the remote
> > > +              * port parent.
> > > +              */
> > > +             node = fwnode_graph_get_remote_endpoint(ep);
> > > +             if (fwnode_device_is_available(node)) {
> > > +                     ret = match(node, con_id, data);
> > > +                     if (ret) {
> > > +                             if (matches)
> > > +                                     matches[count] = ret;
> > > +                             count++;
> > > +                     }
> > > +             }
> >
> > Aren't you missing fwnode_handle-put(node) here??
> 
> It shouldn't be necessary. We aren't break-ing/continue-ing here,
> and fwnode_handle_put(node) is called latter in the loop [1][2]
> 
> BR,
> 
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/base/property.c#n1256
> [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/base/property.c#n1261

I'm really puzzled what do you mean by all this.
Sakari is right, btw.


-- 
With Best Regards,
Andy Shevchenko