Kuldeep Singh Dhaka 7cd7212577 usb: Validate and accept set_configuration properly ...

Setting the same configuration again should act as a lightweight reset, not be
ignored.  This resulted in data toggle bits not being reset and alternet
settings not being reset.

Further, completely invalid configurations were accepted, when they should have
result in a stall. (Section 9.4.7 of USB 2.0 spec)

fixes Github issue #302

Tested-by: Karl Palsson <karlp@tweak.net.au>

2015-09-22 22:28:02 +00:00

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