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    Subject[PATCH AUTOSEL 4.18 81/92] dmaengine: idma64: Support dmaengine_terminate_sync()
    Date
    From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

    [ Upstream commit bbacb8e78a3b29ebdbb6af7d54fcf25d3f1c248f ]

    It appears that the driver misses the support of dmaengine_terminate_sync().
    Since many of callers expects this behaviour implement the new
    device_synchronize() callback to allow proper synchronization when stopping
    a channel.

    Fixes: b36f09c3c441 ("dmaengine: Add transfer termination synchronization support")
    Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
    Signed-off-by: Vinod Koul <vkoul@kernel.org>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    ---
    drivers/dma/idma64.c | 8 ++++++++
    1 file changed, 8 insertions(+)

    diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c
    index e5c911200bdb..1fbf9cb9b742 100644
    --- a/drivers/dma/idma64.c
    +++ b/drivers/dma/idma64.c
    @@ -496,6 +496,13 @@ static int idma64_terminate_all(struct dma_chan *chan)
    return 0;
    }

    +static void idma64_synchronize(struct dma_chan *chan)
    +{
    + struct idma64_chan *idma64c = to_idma64_chan(chan);
    +
    + vchan_synchronize(&idma64c->vchan);
    +}
    +
    static int idma64_alloc_chan_resources(struct dma_chan *chan)
    {
    struct idma64_chan *idma64c = to_idma64_chan(chan);
    @@ -583,6 +590,7 @@ static int idma64_probe(struct idma64_chip *chip)
    idma64->dma.device_pause = idma64_pause;
    idma64->dma.device_resume = idma64_resume;
    idma64->dma.device_terminate_all = idma64_terminate_all;
    + idma64->dma.device_synchronize = idma64_synchronize;

    idma64->dma.src_addr_widths = IDMA64_BUSWIDTHS;
    idma64->dma.dst_addr_widths = IDMA64_BUSWIDTHS;
    --
    2.17.1
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