linux-kernel - Re: [PATCH] of: Print rather than WARN'ing when overlap check fails

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Date:	Tue, 10 Nov 2015 20:28:55 +1100
From:	Michael Ellerman <mpe@...erman.id.au>
To:	robh+dt@...nel.org
Cc:	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, mitchelh@...eaurora.org,
	frowand.list@...il.com, grant.likely@...aro.org
Subject: Re: [PATCH] of: Print rather than WARN'ing when overlap check fails

On Tue, 2015-11-10 at 16:08 +1100, Michael Ellerman wrote:

> __rmem_check_for_overlap() is called very early in boot, and on some
> powerpc systems it's not safe to call WARN that early in boot.
> 
> If the overlap check fails the system will oops instead of printing a
> warning. Furthermore because it's so early in boot the console is not up
> and the user doesn't see the oops, they just get a dead system.
> 
> Fix it by printing an error instead of calling WARN.
> 
> Fixes: ae1add247bf8 ("of: Check for overlap in reserved memory regions")
> Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
> ---
>  drivers/of/of_reserved_mem.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)

I forgot to say, I assume you're OK to merge this and get it to Linus soonish?
Otherwise I can stuff it in a fix branch and ask Linus to pull that. Let me
know which you'd prefer.

cheers

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