[PATCH 1/8] spi: davinci: Use SPI framework to handle DMA mapping

[Mark Brown]

On Fri, Feb 10, 2017 at 04:29:37PM +0100, Frode Isaksen wrote:

> Note that the dummy buffer used when doing one-way transfer, must
> still be mapped in this module.

No, the driver shouldn't be doing this - it should specify if it's
_MUST_RX and/or _MUST_TX and let the core handle it.
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