linux-kernel - Re: [PATCH] clk: Check parent for NULL in clk_change

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Message-ID: <20120612221821.GJ19410@gmail.com>
Date:	Tue, 12 Jun 2012 15:18:21 -0700
From:	Mike Turquette <mturquette@...com>
To:	Pawel Moll <pawel.moll@....com>
Cc:	Mike Turquette <mturquette@...aro.org>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] clk: Check parent for NULL in clk_change_rate

On 20120608-14:04, Pawel Moll wrote:
> clk_change_rate() is accessing parent's rate without checking
> if the parent exists at all. In case of root clocks this will
> cause NULL pointer dereference.
> 
> This patch follows what clk_calc_new_rates() does in such
> situation.
> 
> Signed-off-by: Pawel Moll <pawel.moll@....com>

Pawel,

This problem is indeed a real one.  I've taken your patch into clk-next
for testing.

Thanks much,
Mike
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