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Date:   Fri, 12 Mar 2021 16:36:14 +0900
From:   Dominique MARTINET <dominique.martinet@atmark-techno.com>
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Sakari Ailus <sakari.ailus@iki.fi>,
        linux-uvc-devel@lists.sourceforge.net, linux-usb@vger.kernel.org,
        linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH RESEND v3 0/5] media: uvcvideo: Fix race conditions
Message-ID: <YEsZ7qnSRv0EkJGG@atmark-techno.com>
References: <20200917022547.198090-1-linux@roeck-us.net>
 <20200917124714.GD3969@pendragon.ideasonboard.com>
 <990652f1-b6e4-211c-7a96-8c3fc3ea6efd@roeck-us.net>
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Hi,

Guenter Roeck wrote on Thu, Sep 17, 2020 at 07:16:17PM -0700:
> On 9/17/20 5:47 AM, Laurent Pinchart wrote:
> > On Wed, Sep 16, 2020 at 07:25:42PM -0700, Guenter Roeck wrote:
> >> Something seems to have gone wrong with v3 of this patch series.
> >> I am sure I sent it out, but I don't find it anywhere.
> >> Resending. Sorry for any duplicates.
> > 
> > I haven't checked the mailing list, but I've found it in my inbox :-)
> > I'm not forgetting about you, just been fairly busy recently. I still
> > plan to try and provide an alternative implementation in the V4L2 core
> > (in a form that I think should even be moved to the cdev core) that
> > would fix this for all drivers.
> > 
> Thanks for letting me know. As it turns out, this problem is responsible
> for about 2% of all Chromebook crashes, so I'll probably not wait for
> the series to be accepted upstream but apply it as-is to the various
> ChromeOS kernel branches.

We have a customer who reported the same issue recently, has there been
any development?

I don't see anything in either uvc nor v4l2 that would address the race
since this mail half a year ago (well, I could have missed it ;))


If nothing happened I'll probably backport this series as well, at which
point it might make more sense to take it in until a better fix gets
here then revert it...


Thanks!
-- 
Dominique