Re: [PATCH v2] console: use first console if stdout-path device doesn't appear

[Larry Finger]

On 10/31/2016 10:50 AM, Paul Burton wrote:
> On Monday, 31 October 2016 12:14:55 GMT Paul Burton wrote:
> > If a device tree specified a preferred device for kernel console output
> > via the stdout-path or linux,stdout-path chosen node properties there's
> > no guarantee that it will have specified a device for which we have a
> > driver. It may also be the case that we do have a driver but it doesn't
> > call of_console_check() to register as a preferred console (eg. offb
> > driver as used on powermac systems). In these cases try to ensure that
> > we provide some console output by enabling the first usable registered
> > console, which we keep track of with the of_fallback_console variable.
> >
> > Tested in QEMU with a PowerPC pseries_defconfig kernel.
>
> Actually whilst this fixes the output in QEMU it has other problems. I'm still
> digging...

As expected, it does n ot work with 4.9-rc3 on the real PowerPC.

Larry