Hans,
sorry for bothering you with another issue on friday evening. :-/
But it seems that commit 958c7c7e65 ("[media] v4l2-ctrls: fix corner
case in round-to-range code") introduced a regression for controls which
are using a negative integer value range.
All negative values are mapped to the maximum (positive) value (check
em28xx brightness, red and blue balance bridge controls for example).
Reverting this commit makes them working again.
At a first glance I can't find a mistake...
Have a nice weekend,
Frank
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