[RFC PATCH v2 8/9] USB: add HCD_NO_COHERENT_MEM host controller driver flag

[Alan Stern]

On Tue, 2 Mar 2010, Albert Herranz wrote:

> > Currently "this URB doesn't require PIO" is always true, but in the 
> > future it won't be.
> > 
> 
> Can this be currently tested?

Not yet, but soon.  You can follow the gory details in this email 
thread:

	http://marc.info/?l=linux-usb&m=126477569707174&w=2

See especially this email:

	http://marc.info/?l=linux-usb&m=126630714002200&w=2

> Should I make provisions for this check now too?

Don't worry about it.  If you structure the code as I described, it 
will be easy to insert the check later on.

Alan Stern