Name

usb_free_coherent — free memory allocated with usb_alloc_coherent

Synopsis

void usb_free_coherent (struct usb_device *  dev,
 size_t  size,
 void *  addr,
 dma_addr_t  dma);

Arguments

dev

device the buffer was used with

size

requested buffer size

addr

CPU address of buffer

dma

DMA address of buffer

Description

This reclaims an I/O buffer, letting it be reused. The memory must have been allocated using usb_alloc_coherent, and the parameters must match those provided in that allocation request.