linux-kernel - Re: [PATCH v2 3/9] clocksource/cadence_ttc: Store timer frequency in driver data

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Date:	Wed, 18 Dec 2013 08:47:52 -0800
From:	Sören Brinkmann <soren.brinkmann@...inx.com>
To:	Daniel Lezcano <daniel.lezcano@...aro.org>
CC:	Michal Simek <michal.simek@...inx.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH v2 3/9] clocksource/cadence_ttc: Store timer frequency in
 driver data

Hi Daniel,

On Wed, Dec 18, 2013 at 03:53:51PM +0100, Daniel Lezcano wrote:
> On 12/17/2013 08:21 PM, Sören Brinkmann wrote:
> >Hi Daniel,
> >
> >On Tue, Nov 26, 2013 at 05:04:50PM -0800, Soren Brinkmann wrote:
> >>It is not allowed to call clk_get_rate() from interrupt context. To
> >>avoid such calls the timer input frequency is stored in the driver's
> >>data struct which makes it accessible to the driver in any context.
> >>
> >>Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
> >>Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> >
> >I doubt that we'll resolve all issues with this series before the
> >holidays or even the next merge window. Could you take this patch into
> >your tree for 3.14? It is not directly related to the cpufreq work and
> >fixes an actual issue that triggers a kernel WARN under some condition
> >(I missed preserving the details and the trace). That would take the
> >easy stuff out of the way and we can focus on the more controversial
> >changes.
> 
> You are asking to take it for 3.14 but shouldn't it go as a 3.13 fix ?

That's also an option. As I remember, the patch fixes a kernel WARN. The
system still seemed operational though. Up to you whether this is
considered severe enough for the 3.13 series. I'm happy either way.

	Sören


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