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Re: [RFC] DMA initialization for manually created devices

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On Tue, 2016-04-19 at 14:38 +0300, Felipe Balbi wrote:
> 
> The reason for that I'm using a manually created platform_device and
> that misses dev->archdata which the underlying/parent PCI device has.

Typically we'd expect you to use the parent device for DMA, as in your
second option.

That said, we're exploring the option of moving the dma_ops to be a
first-class member of 'struct device' instead of hiding it in archdata,
and cleaning up the way that it gets initialised for newly-created
devices. And at that point we might end up letting it get inherited
from the parent so your original code *would* work... but I wouldn't
hold your breath for that.

Definitely *don't* mess around in archdata.

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@intel.com                              Intel Corporation

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Thread

[RFC] DMA initialization for manually created devices Felipe Balbi <felipe.balbi@linux.intel.com> - 2016-04-19 13:50 +0200
  Re: [RFC] DMA initialization for manually created devices David Woodhouse <dwmw2@infradead.org> - 2016-04-19 14:20 +0200
    Re: [RFC] DMA initialization for manually created devices Felipe Balbi <felipe.balbi@linux.intel.com> - 2016-04-19 15:00 +0200
      Re: [RFC] DMA initialization for manually created devices Felipe Balbi <felipe.balbi@linux.intel.com> - 2016-04-20 12:40 +0200

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