RG100A-AA
BARRIER BREAKER (14.07, r42625)
RT3070 Wireless Adapter(usb)
general usb hub

1. RG100A-AA + RT3070
RT3070 Wireless Adapter plug into RG100A-AA's usb socket directly, successfully searching wifi AP,  and successflly cennect to wifi AP.
2. RG100A-AA + USB Hub +RT3070
RT3070 Wireless Adapter plug into USB Hub, USB Hub plug into RG100A-AA's usb socket, successfully searching wifi AP,  but can not cennect to wifi AP.
3.After uninstall kmod_usb2
mode 1 and mode can also searching wifi AP, but can not connect to it.
4.After reinstall kmod_usb2
mode 1 and mode 2
5. RG100A-AA + USB Hub +PC (Everything is right)

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                                                     |       Search wif AP      |     Connect to wif AP    |                                     |
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RG100A-AA + RT3070                    |      OK                       |      OK                           |   kmod_usb2               |
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RG100A-AA + USB Hub + RT3070  |      OK                        |     Fail                           |   kmod_usb2               |
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RG100A-AA + RT3070                    |      OK                       |      Fail                          | (uninstall kmod_usb2) |
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RG100A-AA + USB Hub + RT3070  |      OK                        |     Fail                           | (uninstall kmod_usb2) | 
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PC + RT3070                                 |      OK                       |      OK                           |                                     |
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PC + USB Hub + RT3070               |      OK                        |     OK                           |                                     |