linux-kernel - Re: [PATCH] ARM: l2c: prima2: only call l2x0_of

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Message-ID: <20140428091532.GG26756@n2100.arm.linux.org.uk>
Date:	Mon, 28 Apr 2014 10:15:33 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Matt Porter <mporter@...aro.org>
Cc:	Barry Song <baohua@...nel.org>, Kevin Hilman <khilman@...aro.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: l2c: prima2: only call l2x0_of_init() on matching
	nodes

On Sun, Apr 27, 2014 at 08:27:40PM -0400, Matt Porter wrote:
> l2x0_of_init() is executed unconditionally within the sirfsoc_l2x0_init()
> early initcall. In a multi v7 kernel this causes bcm281xx and bcm21664
> platform to fail boot since they have their own pre l2x0 init sequence
> that is required. Fix this by checking that a matching OF ID is present
> before calling l2x0_of_init().
> 
> Reported-by: Kevin Hilman <khilman@...aro.org>
> Signed-off-by: Matt Porter <mporter@...aro.org>
> ---
> Applies against next-20140424 to fix the issue introduced in
> 50655e6 ARM: l2c: prima2: remove cache size override

Err, this only "fixes" it because it effectively disables the L2 cache
_entirely_ - in the above commit, I kill your private compatible strings.

This doesn't make sense.  If the cache is already enabled, then the L2C
code won't try to enable it again.

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