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Date:   Tue, 29 Jan 2019 09:18:46 -0800
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
Message-ID: <20190129171846.GD5720@atomide.com>
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* 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