Re: [REGRESSION] linux-next panics when trying to mount root

[RafaÅ MiÅecki]

On 2018-01-16 16:30, Boris Brezillon wrote:
> On Tue, 16 Jan 2018 16:02:35 +0100
> Peter Rosin <peda@xxxxxxxxxx> wrote:
>
> > On 2018-01-16 15:21, Boris Brezillon wrote:
> > > On Tue, 16 Jan 2018 14:56:52 +0100
> > > Peter Rosin <peda@xxxxxxxxxx> wrote:
> > >
> > >> Hmmm, I guess the question is if the command line should override the
> > >> device tree or not?
> > >
> > > Yep, that's the problem. Now the core parses the compatible to decides
> > > which part parser should be used. The thing is, the "cmdline" parser is
> > > not yet exposing a compatible id, and even if it was, this would
> > > require patching all DTs to add this new compatible.
> > >
> > > 	partitions {
> > > 		compatible = "cmdline", "fixed-partitions";
> > > 		...
> > > 	};
> > >
> > > Not really an option, so I'll drop the 2 patches for now until we find a
> > > better solution.
> > >
> > >> I'm going to send a patch for the above dts change either way...
> > >
> > > If you want, but that does not solve the problem: we should not break
> > > existing users.
> >
> > Well, don't let these devices stop you, they will not get a new kernel
> > w/o also getting a new dtb, and I can handle this just fine. But maybe
> > I'm just the first reporter and you'd rather not risk anything? 
> > Anyway,
> > just wanted to let you know where I stand...
>
> Unfortunately, at91 is not the only platform to have "fixed-partitions"
> defined in its DTs, and I guess users of other platforms also like to
> override the default MTD layout by their own using mtdparts.I'd like to
> find a solution that keeps everyone happy.

I absolutely agree with Boris, we can't risk such regressions. That had 
to
be dropped and I'm looking for a better solution.