George McCollister 418fdd08dd usb: Prevent RX_CTR and TX_CTR from being cleared
When writing the USB endpoint register, USB_EP_RX_CTR (bit 15) and
USB_EP_TX_CTR (bit 7) should be set to avoid inadvertently clearing
either bit.

Prior to this patch end points could indefinately stall if the hardware
changed these bits between the time they are read and when they were
written.

Signed-off-by: George McCollister <george.mccollister@gmail.com>
2015-01-02 19:01:16 +00:00
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