Re: [PATCH] dma-mapping: remove an unnecessary NULL check

[Ian Abbott]

On 25/04/2019 15:18, Christoph Hellwig wrote:
> On Thu, Apr 25, 2019 at 03:13:49PM +0100, Ian Abbott wrote:
> > So for comedi_isadma, we can just replace the NULL with a pointer to a
> > static dummy device with a 24-bit coherent mask?
>
> It should be converted to a proper isa_driver, so that it gets a real
> struct device.

But it will work as a short term solution?  comedi_isadma isn't a 
driver, but is used by a few comedi drivers for ISA cards.

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