On Tue, Sep 02, 2014 at 05:02:37PM +0800, Barry Song wrote: > From: Qipan Li <Qipan.Li@xxxxxxx> > > some customers want a pure PIO transfer mode even though DMA mode is > supported. here we give them a Kconfig option, but still keep the DMA > enabled in default. This doesn't feel like something for the standard kernel - can you explain the benefit the customers think they're getting here? It seems like either this is something we should have as a more general option, perhaps controllable at runtime or there's likely to be some bug or other problem that's being worked around here.
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