Messages in this thread | | | Subject | Re: [BK PATCH] USB update for 2.6.3 | From | Benjamin Herrenschmidt <> | Date | Fri, 20 Feb 2004 18:10:41 +1100 |
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> You miss how all of this stuff is being used :-) > > USB drivers do things like map DMA memory, and the generic DMA layer vectors it > so that if the USB device is attached to a PCI host the PCI DMA mapping routines > get used.
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 ?
Or do they have always to pass their host controller one ?
In the former case, we need that inheritance stuff. In the later case we don't. At this point, it's pretty much a matter of policy.
Ben.
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