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    SubjectDmaengine query
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    Hi Dan,

    I am currently writing dmaengine compatible DMA driver for our ARM
    based architecture, But I am facing some performance issues doing
    that.

    1. dmaengine says callback should run in tasklet, and next transfer
    cannot be scheduled from the callback.

    Due to these restrictions I am getting some performance issue while
    playing sound in our architecture.


    Can callback call in DMA driver be placed out of spin_lock to submit
    new operations from callback? (only in asynchronous case)

    is this Ok? please comment.


    Thanks and regards,
    Ramdayal


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