Alan Stern wrote:

quoted

Alan: I think you are also working in a patchset to make {un}map_urb_for_dma
remember how the urb was mapped, right?

Yes; you can see an initial version here:

	http://marc.info/?l=linux-usb&m=126901183419219&w=2

This is a bug fix, so it's likely to be merged before your work.

It's a messy situation, with two people changing the same code at the
same time.  I think the best approach will be to wait until the bug-fix
patch is tested and accepted; then I can create a version of your 5/10
and 6/10 patches adding HCD_NO_COHERENT_MEM and the corresponding
behavior.  That can stand by itself, and once it is accepted the rest
of your series should go through with no difficulty (at least, no
difficulties involving the USB core!).

Agreed. I'll keep an eye on these developments.

Alan Stern

Thanks a lot,
Albert