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From: Michael Ellerman <mpe-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org>
To: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org,
	mitchelh-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
	frowand.list-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org
Subject: Re: [PATCH] of: Print rather than WARN'ing when overlap check fails
Date: Tue, 10 Nov 2015 20:28:55 +1100	[thread overview]
Message-ID: <1447147735.1314.1.camel@ellerman.id.au> (raw)
In-Reply-To: <1447132113-31434-1-git-send-email-mpe-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org>

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-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org>
> ---
>  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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  parent reply	other threads:[~2015-11-10  9:28 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-10  5:08 [PATCH] of: Print rather than WARN'ing when overlap check fails Michael Ellerman
     [not found] ` <1447132113-31434-1-git-send-email-mpe-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org>
2015-11-10  9:28   ` Michael Ellerman [this message]
2015-11-10  9:41 ` David Laight
     [not found]   ` <063D6719AE5E284EB5DD2968C1650D6D1CBCEE2E-VkEWCZq2GCInGFn1LkZF6NBPR1lH4CV8@public.gmane.org>
2015-11-10 21:47     ` Michael Ellerman

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