On Thu, Jul 31, 2014 at 02:22:23PM +0100, Russell King - ARM Linux wrote:

DMA engine has lacked a lot of infrastructure for common patterns in
drivers; some of that is solved by my efforts with the virt_dma.c
support, and also various cleanups to existing drivers, but it's not
easy to fix this problem after drivers have been merged.

I think list management is something that needs fix. I see lots of time and
energy being spent by drivers in this.
I will plan for this in near future to move descriptor and list management
to the framework. That should help drivers get cleaned up a bit more

-- 
~Vinod