linux-kernel - Re: [PATCH] ASoC: fsl_spdif: Fix unexpected interrupt after suspend

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Message-ID: <CAOMZO5A_0KncwCgfZ6LSAO-LA01U9LS4=Hopn-_9qj8cv1Qhmg@mail.gmail.com>
Date:   Tue, 22 Jun 2021 12:20:19 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Shengjiu Wang <shengjiu.wang@....com>
Cc:     Timur Tabi <timur@...nel.org>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Xiubo Li <Xiubo.Lee@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        linuxppc-dev@...ts.ozlabs.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: fsl_spdif: Fix unexpected interrupt after suspend

On Tue, Jun 22, 2021 at 9:50 AM Shengjiu Wang <shengjiu.wang@....com> wrote:
>
> When system enter suspend, the machine driver suspend callback
> function will be called, then the cpu driver trigger callback
> (SNDRV_PCM_TRIGGER_SUSPEND) be called, it would disable the
> interrupt.
>
> But the machine driver suspend and cpu dai driver suspend order
> maybe changed, the cpu dai driver's suspend callback is called before
> machine driver's suppend callback, then the interrupt is not cleared
> successfully in trigger callback.
>
> So need to clear interrupts in cpu dai driver's suspend callback
> to avoid such issue.
>
> Fixes: 9cb2b3796e08 ("ASoC: fsl_spdif: Add pm runtime function")
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>

Reviewed-by: Fabio Estevam <festevam@...il.com>