Hi Experts,

I tried sending a data of size 100 bytes in the control OUT request from
MAC OS X 10.10 to a USB device.

First 64 bytes are transmitted successfully in a transfer, the remaining 36
bytes are transfered but the device sends back "NAK" token and the driver
API returns timeout without attempting to PING and transmit back.

How to fix the same ?

Regards,
Lyf
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