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

[Sourav Poddar]

On Thursday 28 November 2013 05:29 PM, Mark Brown wrote:
> On Thu, Nov 28, 2013 at 04:38:27PM +0530, Sourav Poddar wrote:
>> On Thursday 28 November 2013 04:19 PM, Mark Brown wrote:
>>> Removing the mapping isn't going to stop another context which has
>>> obtained a handle on the map trying to look at the mapping.
>> hmm..so the  'memcpy' part should be made atomic.(if possible?).
> Or holding the memory region should prevent normal SPI use (so any users
> ought to drop the memory region when they don't need it).
hmm.ok i will unmap the memory region when not in use.
> I'm still a bit surprised there's no DMA controllers for this...
Yes, but thats the truth :(