torvalds at linux-foundation.org
Thu Feb 26 15:32:01 EST 2009
On Thu, 26 Feb 2009, Jesper Krogh wrote:
> Linus Torvalds wrote:
> > On Thu, 26 Feb 2009, Jesper Krogh wrote:
> > >
> > > Booting up 2.6.29-rc6 gave me this one in dmesg...
> > >
> > > [ 21.136149] ck804xrom ck804xrom_init_one(): Unable to register resource
> > > 0x00000000ff000000-0x00000000ffffffff - kernel bug?
> > Well, it _is_ a kernel bug, but it's in that stupid driver. It does
> > everything wrong, including printing out a scary message.
> I've seen that before.. (even reported it before). It just "slipped" into the
> cut'n'paste It was the following stuff that I intended to report.
Ok. They very much are related. The new warning is just that - a new
> > > [ 21.136269] WARNING: at arch/x86/mm/ioremap.c:208
> > > __ioremap_caller+0x359/0x390()
> > This is a different, but related warning, since the driver is doing an
> > ioremap across different resources. The warning is directly related to the
> > fact that the resource wasn't actually valid to begin with.
> > What does "cat /proc/iomem" say?
Ok, so the thing conflicts with
ff700000-ffffffff : reserved
ff700000-ffffffff : pnp 00:0b
and that probably _is_ somehow related to the whole flash thing.
I guess the driver could use "insert_resource()" and the problem would go
away. Except I do think it should be marked very dangerous some way, so
that you can't even enable it unless you really really know you want to
(eg something like EXPERIMENTAL). Because I don't think this driver is
appropriate in any other case..
> Being a "stupid" user, I pick the easy way to build a fresh kernel: 1)
> pick the distro .config 2) make oldconfig 3) Let the kernel load what it
> think it needs. 4) Report if I see and strange stuff (warnings / bugs /
> oops) or misbehaviour.
> So I dont know if I need that driver for anything vital. Should I care?
> Or shouldn't it "just work"?
You definitely don't need it, and everything will work without it.
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