• Takashi Iwai's avatar
    ALSA: hda: Remove page allocation redirection · 619a1f19
    Takashi Iwai authored
    The HD-audio core allocates and releases pages via driver's specific
    dma_alloc_pages and dma_free_pages ops defined in bus->io_ops.  This
    was because some platforms require the uncached pages and the handling
    of page flags had to be done locally in the driver code.
    
    Since the recent change in ALSA core memory allocator, we can simply
    pass SNDRV_DMA_TYPE_DEV_UC for the uncached pages, and the only
    difference became about this type to be passed to the core allocator.
    That is, it's good time for cleaning up the mess.
    
    This patch changes the allocation code in HD-audio core to call the
    core allocator directly so that we get rid of dma_alloc_pages and
    dma_free_pages io_ops.  If a driver needs the uncached pages, it has
    to set bus->dma_type right after the bus initialization.
    
    This is merely a code refactoring and shouldn't bring any behavior
    changes.
    Reviewed-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    619a1f19
hdac_controller.c 15.7 KB