linux-kernel - Re: [RFC/PATCH v2 0/7] locking fixes for cx88

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Date:	Tue, 5 Apr 2011 13:17:01 -0500
From:	Jonathan Nieder <jrnieder@...il.com>
To:	linux-media@...r.kernel.org
Cc:	Huber Andreas <hobrom@...ax.at>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Hans Verkuil <hverkuil@...all.nl>,
	linux-kernel@...r.kernel.org, Ben Hutchings <ben@...adent.org.uk>,
	Steven Toth <stoth@...nellabs.com>
Subject: Re: [RFC/PATCH v2 0/7] locking fixes for cx88

Jonathan Nieder wrote:

> Jonathan Nieder (7):
>   [media] cx88: protect per-device driver list with device lock
>   [media] cx88: fix locking of sub-driver operations
>   [media] cx88: hold device lock during sub-driver initialization
>   [media] cx88: use a mutex to protect cx8802_devlist
>   [media] cx88: handle attempts to use unregistered cx88-blackbird
>     driver
>   [media] cx88: don't use atomic_t for core->mpeg_users
>   [media] cx88: don't use atomic_t for core->users

Good news: Andreas Huber <hobrom@....at> tested on a PC with 2
Hauppauge HVR1300 TV cards.

He writes:

> Hi Jonathan, I'm glad to say it works! No more deadlocks,
> no more reference count issues.
>
> I did some stress testing on the driver load and unload mechanism
> with and without the video devices being in use. And it was
> handled all very well.
>
> Great job, thanks!
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