linux-kernel - Re: [PATCH] ASoC: tlv320aic32x4: Kernel OOPS while entering DAPM standby mode

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Date:   Fri, 4 Jan 2019 22:10:40 +0530
From:   b-ak <anur.bhargav@...il.com>
To:     Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: tlv320aic32x4: Kernel OOPS while entering DAPM
 standby mode

On Fri, Jan 04, 2019 at 01:04:21AM +0530, b-ak wrote:
> On Thu, Jan 03, 2019 at 12:45:54PM +0000, Mark Brown wrote:
> > On Wed, Jan 02, 2019 at 10:36:33PM +0530, b-ak wrote:
> > > During the bootup of the kernel, as soon as the DAPM framework kicks in
> > > it pushes the codec into standy mode.
> > > 
> > > The existing TVL320AIC32x4 codec driver doesn't prepare the clock in
> > > the probe function.
> > > This leads to an OOPS when the DAPM tries to put it into standy by calling
> > > clk_disable_unprepare()
> > > 
> > > This patch fixes that problem.
> > 
> > This isn't the best way of fixing this because it makes it look like
> > there's a missing disable in the removal process.  What would be better
> > would be to do what other drivers do and check to see what state we're
> > transitioning from before we disable the clock in set_bias_level().  See
> > drivers like wm8903.c for examples.
> 
> Hello Mark,
> 
> I will test the change and update the patch.
> 
> Thanks,
> Bhargav
> 

Hi Mark,

I have updated the patch with the changes.

Regards,
Bhargav


View attachment "0001-ASoC-tlv320aic32x4-Kernel-OOPS-while-entering-DAPM-s.patch" of type "text/x-diff" (1343 bytes)