linux-kernel - Re: [PATCH v5 09/11] arm: add support for reserved memory defined by device tree

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Date:	Sat, 15 Mar 2014 13:07:49 +0000
From:	Grant Likely <grant.likely@...aro.org>
To:	Kevin Hilman <khilman@...aro.org>,
	Josh Cartwright <joshc@...eaurora.org>
Cc:	Marek Szyprowski <m.szyprowski@...sung.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linaro-mm-sig@...ts.linaro.org,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	linux-doc@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Arnd Bergmann <arnd@...db.de>,
	Michal Nazarewicz <mina86@...a86.com>,
	Tomasz Figa <t.figa@...sung.com>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Laura Abbott <lauraa@...eaurora.org>,
	Rob Herring <robh+dt@...nel.org>,
	Olof Johansson <olof@...om.net>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ian.campbell@...rix.com>,
	Tomasz Figa <tomasz.figa@...il.com>,
	Kumar Gala <galak@...eaurora.org>,
	Nishanth Peethambaran <nishanth.p@...il.com>,
	Marc <marc.ceeeee@...il.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH v5 09/11] arm: add support for reserved memory defined by device tree

On Thu, 13 Mar 2014 14:51:56 -0700, Kevin Hilman <khilman@...aro.org> wrote:
> Josh Cartwright <joshc@...eaurora.org> writes:
> 
> > On Thu, Mar 13, 2014 at 01:46:50PM -0700, Kevin Hilman wrote:
> >> On Fri, Feb 21, 2014 at 4:25 AM, Marek Szyprowski
> >> <m.szyprowski@...sung.com> wrote:
> >> > Enable reserved memory initialization from device tree.
> >> >
> >> > Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
> >> 
> >> This patch has hit -next and several legacy (non-DT) boot failures
> >> were detected and bisected down to this patch.  A quick scan looks
> >> like there needs to be some sanity checking whether a DT is even
> >> present.
> >
> > Hmm.  Yes, the code unconditionally calls of_flat_dt_scan(), which will
> > gladly touch initial_boot_params, even though it may be uninitialized.
> > The below patch should allow these boards to boot...
> >
> > However, I'm wondering if there is a good reason why we don't parse the
> > /reserved-memory nodes at the right after we parse the /memory nodes as
> > part of early_init_dt_scan()...
> >
> > Thanks,
> >   Josh
> >
> > --8<--
> > Subject: [PATCH] drivers: of: only scan for reserved mem when fdt present
> >
> > Reported-by: Kevin Hilman <khilman@...aro.org>
> > Signed-off-by: Josh Cartwright <joshc@...eaurora.org>
> 
> This gets legacy boot working again.  Thanks.
> 
> Tested-by: Kevin Hilman <khilman@...aro.org>

Applied and confirmed on non-DT qemu boot. Thanks. It will be pushed out
shortly.

g.

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