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

From: b-ak
Date: Thu Jan 03 2019 - 14:34:30 EST

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.