DMA_RELEASE_FROM_COH(9)           Device drivers infrastructure           DMA_RELEASE_FROM_COH(9)



NAME
       dma_release_from_coherent - try to free the memory allocated from per-device coherent
       memory pool

SYNOPSIS
       int dma_release_from_coherent(struct device * dev, int order, void * vaddr);

ARGUMENTS
       dev
           device from which the memory was allocated

       order
           the order of pages allocated

       vaddr
           virtual address of allocated pages

DESCRIPTION
       This checks whether the memory was allocated from the per-device coherent memory pool and
       if so, releases that memory.

       Returns 1 if we correctly released the memory, or 0 if dma_release_coherent should proceed
       with releasing memory from generic pools.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   DMA_RELEASE_FROM_COH(9)