On Wednesday 05 December 2007, Timur Tabi wrote:
> Arnd Bergmann wrote:
>
> > You can argue that the QS is really a DMA device, but in that case you
> > should convert the driver to use the DMA mapping interfaces correctly,
> > which I would consider overkill.
>
> I'm confused. I'm already calling dma_alloc_coherent() and getting a
> dma_addr_t
> back. Why do I need to use mapping functions to convert between virtual and
> physical/bus addresses?
No, I'm sorry but I'm the one who was confused. The problem I saw was that
you return something offset from "bd_phys" as a dma_addr_t. This would be
a lot easier if you had called it bd_bus or bd_dma instead of bd_phys, but
your code looks absolutely correct upon closer inspection.
Arnd <><
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev
