usb-otg driver problem

[guohui luo]

Dear all:

 I insert a hub into a usb-otg of my board, then i see this following with
"dmesg" ,why ? someone can give me help ? Thanks!!

OUT NAK enhancement disabled, no core support
OUT NAK enhancement disabled, no core support
OUT NAK enhancement disabled, no core support
OUT NAK enhancement disabled, no core support
 OUT NAK enhancement disabled, no core support
OUT NAK enhancement disabled, no core support
 OUT NAK enhancement disabled, no core support
OUT NAK enhancement disabled, no core support
 OUT NAK enhancement disabled, no core support
OUT NAK enhancement disabled, no core support
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