From mboxrd@z Thu Jan  1 00:00:00 1970
From: peter.chen@freescale.com (Peter Chen)
Date: Sat, 8 Jun 2013 09:09:23 +0800
Subject: [PATCH v2 1/1] ARM: imx: clk-pllv3: change wait method for PLL
 lock
In-Reply-To: <20130607110741.GB20756@S2101-09.ap.freescale.net>
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Message-ID: <20130608010922.GA25105@nchen-desktop>
To: linux-arm-kernel@lists.infradead.org
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On Fri, Jun 07, 2013 at 07:07:43PM +0800, Shawn Guo wrote:
> On Fri, Jun 07, 2013 at 10:49:38AM +0200, Uwe Kleine-K?nig wrote:
> > > I will try your fix, but still it just reduces the possibilities.
> > > The problem is not the preemption takes too long, it is the jiffies
> > > updates more than one tick at one short preemption.
> > If that is really the problem that many more instances that use the same
> > incarnation need the same fix. I would be surprised if that was the
> > case.
> 
> +1
> 

Using uwe's patch, the pll lock timeout hasn't appeared during the
overtime test, usually, it will occur 4 or 5 times during overnight
test. The reason why I suspect jiffies update problem that is we
meet the similiar issue at other drivers which timeout is 2 jiffies,
but it is satisfied within 1ms.

I will do more test, if it is passed, I will send patch with uwe's suggestion.
Thanks.

-- 

Best Regards,
Peter Chen