• D
    dmaengine: ack to flags: make use of the unused bits in the 'ack' field · 636bdeaa
    Dan Williams 提交于
    'ack' is currently a simple integer that flags whether or not a client is done
    touching fields in the given descriptor.  It is effectively just a single bit
    of information.  Converting this to a flags parameter allows the other bits to
    be put to use to control completion actions, like dma-unmap, and capture
    results, like xor-zero-sum == 0.
    
    Changes are one of:
    1/ convert all open-coded ->ack manipulations to use async_tx_ack
       and async_tx_test_ack.
    2/ set the ack bit at prep time where possible
    3/ make drivers store the flags at prep time
    4/ add flags to the device_prep_dma_interrupt prototype
    Acked-by: NMaciej Sosnowski <maciej.sosnowski@intel.com>
    Signed-off-by: NDan Williams <dan.j.williams@intel.com>
    636bdeaa
dmaengine.c 17.1 KB