[Bug 759292] Buffer free on error leads to infinite recursion in gstv4l2

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=759292

--- Comment #11 from Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> ---
Now queued for 1.12.3

Author: Matt Fischer <matt.fischer at garmin.com>
Date:   Wed Jun 28 14:05:27 2017 -0500

    v4l2: Block recursive calls to resurect_buffer

    When resurrecting a buffer, the subsequent free call can result
    in the group-released handler being called again, which causes
    a recursive loop.  This patch blocks the signal handler during
    the time that it executes, ensuring that the loop will not occur.

    https://bugzilla.gnome.org/show_bug.cgi?id=759292

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