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The v4l2_ctrl_config struct must be zeroed before passing it to v4l2_ctrl_new_custom(). This was always wrong, but with the recent v4l2-ctrls.c changes this is now much more likely to lead to a kernel bug. This is the only place where this struct wasn't initialized properly. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Reported-by: Pridvorov Andrey <ua0lnj@bk.ru> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>