From: ben-linux@fluff.org (Ben Dooks)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: SAMSUNG: Bug fix spin_lock recursion in clk_enable() and clk_disable()
Date: Thu, 21 Oct 2010 23:39:16 +0100 [thread overview]
Message-ID: <4CC0C114.8080602@fluff.org> (raw)
In-Reply-To: <20101019185751.GB10325@n2100.arm.linux.org.uk>
On 19/10/10 19:57, Russell King - ARM Linux wrote:
> On Tue, Oct 19, 2010 at 12:09:25AM +0100, Ben Dooks wrote:
>> I'm not sure, but I don't belive that the clk_ api has
>> ever been callable from non-sleepable contexts such as
>> interrupt handlers.
>>
>> I would welcome RMK's response (or any other response)
>> about this issue?
>
> We have traditionally allowed it from non-sleepable contexts, mainly
> because the platforms I've been using it with have had such simple
> clock implementations that it's not worth artifically restricting it,
> or the implementation only requires a few us delay after enabling a
> clock.
Some on chip PLLs can be 150-300uS to get running.
--
Ben
prev parent reply other threads:[~2010-10-21 22:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-12 0:39 [PATCH] ARM: SAMSUNG: Bug fix spin_lock recursion in clk_enable() and clk_disable() Jaecheol Lee
2010-10-18 23:09 ` Ben Dooks
2010-10-19 1:12 ` Jassi Brar
2010-10-19 2:55 ` mhban
2010-10-19 18:57 ` Russell King - ARM Linux
2010-10-21 22:39 ` Ben Dooks [this message]
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