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From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: "Sören Brinkmann" <soren.brinkmann@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH v2 3/9] clocksource/cadence_ttc: Store timer frequency in driver data
Date: Wed, 18 Dec 2013 22:58:26 +0100	[thread overview]
Message-ID: <52B21A82.7050608@linaro.org> (raw)
In-Reply-To: <ce29829b-3727-46ba-8c46-54273ce04745@DB8EHSMHS003.ehs.local>

On 12/18/2013 05:47 PM, Sören Brinkmann wrote:
> 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@xilinx.com>
>>>> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.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.

I was not able to reproduce the WARN with my board.

Please, could you give the WARN or give the procedure to reproduce it ?

Thanks
   -- Daniel


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  reply	other threads:[~2013-12-18 21:58 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-11-27  1:04 [PATCH v2 0/9] arm: zynq: Add support for cpufreq Soren Brinkmann
2013-11-27  1:04 ` [PATCH v2 1/9] arm: dt: zynq: Remove 'clock-ranges' from TTC nodes Soren Brinkmann
2013-12-12  8:53   ` Michal Simek
2013-12-12 17:01     ` Sören Brinkmann
2013-12-12 19:07       ` Michal Simek
2013-11-27  1:04 ` [PATCH v2 2/9] arm: dt: zynq: Add 'cpus' node Soren Brinkmann
2013-11-27  1:04 ` [PATCH v2 3/9] clocksource/cadence_ttc: Store timer frequency in driver data Soren Brinkmann
2013-12-17 19:21   ` Sören Brinkmann
     [not found]     ` <5cff3201-db97-4061-a686-bf79ac17d4fe-W/Q257+MkyH5op9OF0Koj7jjLBE8jN/0@public.gmane.org>
2013-12-18 14:53       ` Daniel Lezcano
     [not found]         ` <52B1B6FF.7000400-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2013-12-18 16:47           ` Sören Brinkmann
2013-12-18 21:58             ` Daniel Lezcano [this message]
2013-12-19 18:32               ` Sören Brinkmann
2013-12-19 20:53                 ` Daniel Lezcano
     [not found]                   ` <52B35CBA.7020202-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2013-12-19 21:23                     ` Sören Brinkmann
     [not found]                       ` <f5bcb974-8645-48d3-b03c-f894c0bb5b7b-6DEzpURlfbPUuUXyfqFqSbjjLBE8jN/0@public.gmane.org>
2013-12-19 21:39                         ` Daniel Lezcano
2013-11-27  1:04 ` [PATCH v2 4/9] clocksource/cadence_ttc: Use enable/disable_irq Soren Brinkmann
     [not found]   ` <1385514296-26702-5-git-send-email-soren.brinkmann-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2013-11-28 11:55     ` Daniel Lezcano
     [not found]       ` <52972F3A.9090103-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2013-11-28 14:18         ` Thomas Gleixner
     [not found]           ` <alpine.DEB.2.02.1311281507280.30673-3cz04HxQygjZikZi3RtOZ1XZhhPuCNm+@public.gmane.org>
2013-11-28 18:36             ` Sören Brinkmann
     [not found]               ` <b2ed3cbc-c9df-4235-8137-93514c05bffa-6DEzpURlfbPnHLUNXTEFU7jjLBE8jN/0@public.gmane.org>
2013-11-28 19:07                 ` Thomas Gleixner
2013-12-06 22:47                   ` Sören Brinkmann
     [not found]                     ` <f6d25456-8e30-4792-b184-21eb02dfaa1c-dAX9Bq04yCRZbvUCbuG1mrjjLBE8jN/0@public.gmane.org>
2013-12-07 10:56                       ` Thomas Gleixner
2013-12-10  0:34                         ` [PATCH 0/2] clockevents Soren Brinkmann
2013-12-10  0:34                           ` [PATCH 1/2] time: Serialize calls to 'clockevents_update_freq' in the timing core Soren Brinkmann
     [not found]                             ` <1386635686-15686-2-git-send-email-soren.brinkmann-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2013-12-11 14:32                               ` Daniel Lezcano
     [not found]                                 ` <52A87799.8010300-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2013-12-11 20:09                                   ` Sören Brinkmann
     [not found]                                     ` <ba4dce4a-1332-4fd8-80de-41347bb5b7b2-8XeO8fnFoNFEus+KprP3J7jjLBE8jN/0@public.gmane.org>
2013-12-12 12:07                                       ` Daniel Lezcano
2013-12-10  0:34                           ` [PATCH 2/2] time: clockevents: Adjust timer interval when frequency changes Soren Brinkmann
2013-11-27  1:04 ` [PATCH v2 5/9] clocksource/cadence_ttc: Adjust interval in clock notifier Soren Brinkmann
     [not found]   ` <1385514296-26702-6-git-send-email-soren.brinkmann-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2013-12-12 12:15     ` Daniel Lezcano
2013-12-12 18:44       ` Sören Brinkmann
2013-11-27  1:04 ` [PATCH v2 6/9] clocksource/cadence_ttc: Overhaul clocksource frequency adjustment Soren Brinkmann
     [not found] ` <1385514296-26702-1-git-send-email-soren.brinkmann-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2013-11-27  1:04   ` [PATCH v2 7/9] clocksource/cadence_ttc: Use only one counter Soren Brinkmann
2013-11-27  1:04 ` [PATCH v2 8/9] arm: zynq: Don't use arm_global_timer with cpufreq Soren Brinkmann
2013-11-27  1:04 ` [PATCH v2 9/9] arm: zynq: Add support for cpufreq Soren Brinkmann

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