linux-kernel - Re: [PATCH 0/5] media: uvcvideo: Fix race conditions

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Message-ID: <20200831001010.GA92208@roeck-us.net>
Date:   Sun, 30 Aug 2020 17:10:10 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@....fi>,
        linux-uvc-devel@...ts.sourceforge.net, linux-usb@...r.kernel.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] media: uvcvideo: Fix race conditions

On Mon, Aug 31, 2020 at 12:36:21AM +0300, Laurent Pinchart wrote:
> Hi Guenter,
> 
[ ... ]

> I'll try to prototype what I envision would be a good solution in the
> V4L2 core. If stars align, I may even try to push it one level up, to
> the chardev layer. Would you then be able to test it ?
> 

Sure, I'll be happy to do that.

I ordered a couple of non-UVC webcams (pwc and gspca) from eBay for
comparison. Both of those use the v4l2 locking mechanism, so we should
be able to see the difference.

Thanks,
Guenter