linux-kernel - Re: [PATCH] ASoC: qcom: lpass-sc7180: Add maybe

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Date:   Tue, 29 Nov 2022 09:05:46 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, lgirdwood@...il.com,
        broonie@...nel.org, robh+dt@...nel.org, quic_plai@...cinc.com,
        bgoswami@...cinc.com, perex@...ex.cz, tiwai@...e.com,
        srinivas.kandagatla@...aro.org, quic_rohkumar@...cinc.com,
        linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, swboyd@...omium.org,
        judyhsiao@...omium.org, devicetree@...r.kernel.org
Subject: Re: [PATCH] ASoC: qcom: lpass-sc7180: Add maybe_unused tag for
 system PM ops

On Tue, Nov 29, 2022 at 09:28:33PM +0530, Srinivasa Rao Mandadapu wrote:
> Thanks for your tie Nathan!!!
> 
> On 11/29/2022 9:15 PM, Nathan Chancellor wrote:
> > On Tue, Nov 29, 2022 at 06:23:48PM +0530, Srinivasa Rao Mandadapu wrote:
> > > Add __maybe_unused tag for system PM ops suspend and resume.
> > > This is required to fix allmodconfig compilation issue.
> > > Fixes: c3bf7699747c ("ASoC: qcom: lpass-sc7280: Add system suspend/resume PM ops")
> > > 
> > > Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
> > A better solution would be replacing SET_SYSTEM_SLEEP_PM_OPS() with
> > SYSTEM_SLEEP_PM_OPS(), which was added to avoid needing to add these
> > '__maybe_unused' attributes to these functions. See commit 1a3c7bb08826
> > ("PM: core: Add new *_PM_OPS macros, deprecate old ones") for more info.
> 
> Tried this option but as this patch required for Kernel 5.4 version code
> base,
> 
> SYSTEM_SLEEP_PM_OPS didn't work.

Ah right, it is a more recent macro. I did not realize this patch was
needed to fix a patch destined for stable.

Perhaps keep this patch but add a second patch after it that converts
to using SYSTEM_SLEEP_PM_OPS() for future releases?

> > > ---
> > >   sound/soc/qcom/lpass-sc7180.c | 4 ++--
> > >   1 file changed, 2 insertions(+), 2 deletions(-)
> > > 
> > > diff --git a/sound/soc/qcom/lpass-sc7180.c b/sound/soc/qcom/lpass-sc7180.c
> > > index b96b85a..41db661 100644
> > > --- a/sound/soc/qcom/lpass-sc7180.c
> > > +++ b/sound/soc/qcom/lpass-sc7180.c
> > > @@ -163,14 +163,14 @@ static int sc7180_lpass_exit(struct platform_device *pdev)
> > >   	return 0;
> > >   }
> > > -static int sc7180_lpass_dev_resume(struct device *dev)
> > > +static int __maybe_unused sc7180_lpass_dev_resume(struct device *dev)
> > >   {
> > >   	struct lpass_data *drvdata = dev_get_drvdata(dev);
> > >   	return clk_bulk_prepare_enable(drvdata->num_clks, drvdata->clks);
> > >   }
> > > -static int sc7180_lpass_dev_suspend(struct device *dev)
> > > +static int __maybe_unused sc7180_lpass_dev_suspend(struct device *dev)
> > >   {
> > >   	struct lpass_data *drvdata = dev_get_drvdata(dev);
> > > -- 
> > > 2.7.4
> > > 
> > >