Re: Fwd: [RFC] MMC: error handling improvements

Russell King - ARM Linux
2011-03-01T20:22:34Z

On Tue, Mar 01, 2011 at 10:39:59AM -0800, Murali Krishna Palnati wrote:
> Our main concern in moving to mmci is support for DMA that needs to be
> added to this driver. I believe PL180 controller does have the ability to
> talk to DMA engines, but i dont see any relevant support for that in mmci
> driver, unless i grossly missed something.

DMA engine support will be added at the next merge window. It's already
in linux-next.

Note that as ARM evaluation boards all have entirely broken DMA, it's
something I can't test here, so I'm entirely reliant on other people
using the driver with working DMA engines, testing it, and reporting
back. This is why the ARM primecell drivers traditionally have had no
DMA support - I just don't have any working hardware to develop such
facilities.