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From: Tony Lindgren <tony@atomide.com>
To: Mark Brown <broonie@kernel.org>
Cc: Doug Anderson <dianders@chromium.org>,
	Sebastian Reichel <sre@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	linux-omap <linux-omap@vger.kernel.org>
Subject: Re: New underflow of regulator enable count warnings in v5.0-rc1
Date: Tue, 29 Jan 2019 09:18:46 -0800	[thread overview]
Message-ID: <20190129171846.GD5720@atomide.com> (raw)
In-Reply-To: <20190129171538.GH10524@sirena.org.uk>

* Mark Brown <broonie@kernel.org> [190129 17:15]:
> On Tue, Jan 29, 2019 at 09:11:51AM -0800, Tony Lindgren wrote:
> 
> > OK. Let's see if Sebastian spots where pwm_vibrator_start()
> > and pwm_vibrator_stop() might get called multiple times
> > or something similar.
> 
> Given that nobody has noticed that the driver stops working entirely
> it's possible that the pattern is something like:
> 
> 
>     pwm_vibrator_start()
>     pwm_vibrator_stop()
>     pwm_vibrator_stop()
>     pwm_vibrator_start()
> 
> so it's a temporary underflow that gets corrected (or it could be that
> not many people are using mainline kernels on these systems).  On your
> system it's the dummy driver but presumably some other users have it
> connected to actual regulators.

Yeah that makes sense.

Regards,

Tony

WARNING: multiple messages have this Message-ID (diff)
From: Tony Lindgren <tony@atomide.com>
To: Mark Brown <broonie@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	linux-omap <linux-omap@vger.kernel.org>,
	Doug Anderson <dianders@chromium.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Sebastian Reichel <sre@kernel.org>
Subject: Re: New underflow of regulator enable count warnings in v5.0-rc1
Date: Tue, 29 Jan 2019 09:18:46 -0800	[thread overview]
Message-ID: <20190129171846.GD5720@atomide.com> (raw)
In-Reply-To: <20190129171538.GH10524@sirena.org.uk>

* Mark Brown <broonie@kernel.org> [190129 17:15]:
> On Tue, Jan 29, 2019 at 09:11:51AM -0800, Tony Lindgren wrote:
> 
> > OK. Let's see if Sebastian spots where pwm_vibrator_start()
> > and pwm_vibrator_stop() might get called multiple times
> > or something similar.
> 
> Given that nobody has noticed that the driver stops working entirely
> it's possible that the pattern is something like:
> 
> 
>     pwm_vibrator_start()
>     pwm_vibrator_stop()
>     pwm_vibrator_stop()
>     pwm_vibrator_start()
> 
> so it's a temporary underflow that gets corrected (or it could be that
> not many people are using mainline kernels on these systems).  On your
> system it's the dummy driver but presumably some other users have it
> connected to actual regulators.

Yeah that makes sense.

Regards,

Tony

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  reply	other threads:[~2019-01-29 17:18 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-29 16:48 New underflow of regulator enable count warnings in v5.0-rc1 Tony Lindgren
2019-01-29 16:48 ` Tony Lindgren
2019-01-29 17:01 ` Mark Brown
2019-01-29 17:01   ` Mark Brown
2019-01-29 17:04 ` Doug Anderson
2019-01-29 17:04   ` Doug Anderson
2019-01-29 17:11   ` Tony Lindgren
2019-01-29 17:11     ` Tony Lindgren
2019-01-29 17:15     ` Mark Brown
2019-01-29 17:15       ` Mark Brown
2019-01-29 17:18       ` Tony Lindgren [this message]
2019-01-29 17:18         ` Tony Lindgren
2019-01-29 17:18 ` Sebastian Reichel
2019-01-29 17:18   ` Sebastian Reichel
2019-01-29 17:27   ` Tony Lindgren
2019-01-29 17:27     ` Tony Lindgren

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