usb_free_coherent (9) Linux Manual Page
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.