usb_ep_free_buffer9
Frees an i/o buffer
Usage
void usb_ep_free_buffer(struct usb_ep * ep, void * buf, dma_addr_t dma, unsigned len);
Arguments
ep
the endpoint associated with the buffer
buf
CPU view address of the buffer
dma
the buffer's DMA address
len
length of the buffer
Overview
reverses the effect of usb_ep_alloc_buffer. caller guarantees the buffer will no longer be accessed