usb_free_coherent —
free memory allocated with usb_alloc_coherent
void usb_free_coherent ( | struct usb_device * dev, |
| size_t size, | |
| void * addr, | |
dma_addr_t dma); |
devdevice the buffer was used with
sizerequested buffer size
addrCPU address of buffer
dmaDMA address of buffer
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.