On Thu, Feb 19, 2015 at 02:23:27PM +0530, Viresh Kumar wrote:

On 19 February 2015 at 13:39, Jean Delvare [off-list ref] wrote:

quoted

My understanding is that the warning message is here on purpose to
instruct DMA driver authors to fix their code. So if anyone need to fix
anything, that would be you and Andy. That being said, I suspect Andy

To some extent yes, but Andy has already tried to fix that for most of
the drivers and so I just pointed out that something is missed.

quoted

already did that:

commit 029a40e97d0db269f4a7fc02b0f29f627f628309
Author: Andy Shevchenko [off-list ref]
Date:   Fri Jan 2 16:17:24 2015 +0200

    dmaengine: dw: provide DMA capabilities

Brian, can you please try the latest Linus or linux-next kernel (or
backport the above commit to your current kernel) and confirm that the
backtraces are no longer printed?

Maybe yes.

This warning was intentionally added to help move driver use the right
method. And I have applied patch from Andy for this, so this should be no
longer seen on Linus's tree

-- 
~Vinod