linux-kernel - Re: Linux 2.6.29-rc6

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Date:	Thu, 26 Feb 2009 20:31:35 +0100
From:	Jesper Krogh <jesper@...gh.cc>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	David Woodhouse <David.Woodhouse@...el.com>,
	Dave Olsen <dolsen@...i.com>, Ryan Jackson <rjackson@...i.com>,
	linux-mtd@...ts.infradead.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.29-rc6

Linus Torvalds wrote:
> Dave Olsen <dolsen@...i.com>,
>     Ryan Jackson <rjackson@...i.com>, David.Woodhouse@...el.com, 
> linux-mtd@...ts.infradead.org
> 
> 
> 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.

>> [   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?

http://krogh.cc/~jesper/iomem.txt

>> System is fully operational, but I didnt get it in 2.6.26.8 (most recent
>> kernel tried on this hardware).
> 
> The ioremap() warning is newish, and may be what made you notice the 
> previous (just one-line) crappy warning.
> 
> Quite frankly, having looked at that horrible driver, I would seriously 
> consider disabling it. Stuff like that should not be allowed to exist.

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"?

-- 
Jesper
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