[PATCH 12/17] spi/qspi: convert driver to enable/disable memory mapped.

[Mark Brown]

On Tue, Nov 26, 2013 at 01:05:08PM +0530, Sourav Poddar wrote:
> Idea is to enable memory mapped by default at the end of the probe,
> if the control reaches the "transfer" api, then the operation is
> not a memory mapped one. Hence, we switch to Normal mode and at the
> end of the "transfer" function. switch back to memory mapped mode.

This doesn't see safe, what happens if something tries to use the map
while a transfer is in progress?
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