Re: [BUG BISECT] Ethernet fail on VF50 (OF: Don't set default coherent DMA mask)

[Guenter Roeck]

On Tue, Jul 31, 2018 at 04:58:41PM +0100, Robin Murphy wrote:
> On 31/07/18 16:43, Guenter Roeck wrote:
> >On Tue, Jul 31, 2018 at 03:09:34PM +0100, Robin Murphy wrote:
> >>>Please note that sparc images still generate the warning (next-20180731).
> >>
> >>Ugh, OK, any ideas what sparc does to create these platform devices that
> >>isn't of_platform_device_create_pdata() and has somehow grown an implicit
> >>dependency on of_dma_configure() since 4.12? I'm looking, but nothing jumps
> >>out...
> >>
> >
> >I suspect it might be of_device_register(), called from
> >	arch/sparc/kernel/of_device_64.c:scan_one_device()
> >	arch/sparc/kernel/of_device_32.c:scan_one_device()
> 
> Right, that's as far as I got as well, so I'm struggling to see how these
> things ever got DMA masks set before the of_dma_configure() call moved out
> of of_platform_device_create_pdata(), or why it wasn't a problem prior to
> the generic dma_ops rework if they didn't :/
> 
Ah, ok. No idea, sorry. All I know is that the messages were first seen
with next-20180727.

Guenter