linux-kernel - Re: [PATCH v7 1/5] omap3isp: Modify clocks registration to avoid circular references

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Message-ID: <20131029232837.GB2266@earth.universe>
Date:	Wed, 30 Oct 2013 00:28:39 +0100
From:	Sebastian Reichel <sre@...g0.de>
To:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	linux-arm-kernel@...ts.infradead.org, mturquette@...aro.org,
	linux@....linux.org.uk, jiada_wang@...tor.com,
	kyungmin.park@...sung.com, linux-kernel@...r.kernel.org,
	uclinux-dist-devel@...ckfin.uclinux.org, linux-mips@...ux-mips.org,
	linux-sh@...r.kernel.org
Subject: Re: [PATCH v7 1/5] omap3isp: Modify clocks registration to avoid
 circular references

Hi,

On Tue, Oct 29, 2013 at 11:28:37PM +0100, Laurent Pinchart wrote:
> On Tuesday 29 October 2013 20:51:04 Sylwester Nawrocki wrote:
> > The clock core code is going to be modified so clk_get() takes
> > reference on the clock provider module. Until the potential circular
> > reference issue is properly addressed, we pass NULL as as the first
> > argument to clk_register(), in order to disallow sub-devices taking
> > a reference on the ISP module back trough clk_get(). This should
> > prevent locking the modules in memory.
> > 
> > Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> > Signed-off-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
> > Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
> 
> Acked-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> 
> Do you plan to push this to mainline as part of this patch series ? I don't 
> have pending patches for the omap3isp that would conflict with this patch, so 
> that would be fine with me.

I plan to add support for DT to omap3isp + ADP1653 shortly. I have
not yet started to work on this, but expect to send some first RFC
patches in November.

-- Sebastian

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