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Subject[UHCI] weird macro in "uhci_hub_control"

I'm surely missing obvious thing but I can't get an answer.
In "uhci_hub_control", there are a lot of uses of OK macro, defined in the same
file. This macro set up "len" local, and do a break. Why does it setup "len"
since it's not used in the function. Moreover it's pretty ugly to hide "break"
keyword in a macro, isn't it ?



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