On Thu, 19 Feb 2004, David S. Miller wrote:
> On Fri, 20 Feb 2004 18:10:41 +1100
> Benjamin Herrenschmidt <[EMAIL PROTECTED]> wrote:
>
> > Hrm... so if the USB device drivers are actually doing the dma mapping
> > themselves, it make sense for them to pass their own struct device, no ?
>
> That's right, at least that was the idea.
No. That would be _fundamentally_ wrong.
There's no way a USB device can do DMA in the first place. It has no DMA
controller, and no way to read/write memory except through the USB host.
So it is the host - and only the host - that matters. Anything else is a
bug.
Linus
-------------------------------------------------------
SF.Net is sponsored by: Speed Start Your Linux Apps Now.
Build and deploy apps & Web services for Linux with
a free DVD software kit from IBM. Click Now!
http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
