[PATCH Eoan] UBUNTU: SAUCE: powerpc/vio: drop bus_type from parent device

[Thadeu Lima de Souza Cascardo]

On Fri, Sep 27, 2019 at 05:06:03PM +0200, Andrea Righi wrote:
> On Fri, Sep 27, 2019 at 11:41:53AM -0300, Thadeu Lima de Souza Cascardo wrote:
> > BugLink: https://bugs.launchpad.net/bugs/1845572
> > 
> > Commit df44b479654f62b478c18ee4d8bc4e9f897a9844 ("kobject: return error code if
> > writing /sys/.../uevent fails") started returning failure when writing to
> > /sys/devices/vio/uevent.
> 
> What's the downside of reverting df44b479654f?
> 

We divert from upstream and change core code, instead of changing only powerpc
specific code.

> > 
> > This causes an early udevadm trigger to fail. On some installer versions of
> > Ubuntu, this will cause init to exit, thus panicing the system very early
> > during boot.
> > 
> > Removing the bus_type from the parent device will remove some of the extra
> > empty files from /sys/devices/vio/, but will keep the rest of the layout for
> > vio devices, keeping them under /sys/devices/vio/.
> > 
> > It has been tested that uevents for vio devices don't change after this fix,
> > they still contain MODALIAS.
> > 
> > Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo at canonical.com>
> > ---
> > 
> > This has been submitted upstream just now.
> 
> Link:?
> 

There was no link yet when I sent the sauce patch.  :-)

http://patchwork.ozlabs.org/patch/1168596/

> Thanks,
> -Andrea