On Monday, November 22, 2010 01:23:39 Laurent Pinchart wrote:
> Hi Hans,
>
> I believe you've introduced a race condition in commit
> dd0daf2a6fb6bec436a3ef68bd585ea09a2a54b7
>
> v4l2-dev: remove unnecessary lock around atomic clear_bit
>
> By removing the mutex_lock/unlock around clear_bit, you're allowing
> device_unregister() to race with v4l2_open(). The device can be unregistered
> between the video_devdata() and video_get() calls.
>
> Could you confirm my analysis ?
Yes, that's correct. Good catch.
Regards,
Hans
--
Hans Verkuil - video4linux developer - sponsored by Cisco
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