linux-kernel - Re: [PATCH v4 01/11] ASoC: SOF: core: add 'no

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Message-ID: <ac21f644-dedc-289b-3783-0cf2db8c0a73@linux.intel.com>
Date:   Wed, 30 Aug 2023 12:13:17 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        alsa-devel@...a-project.org
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Daniel Baluta <daniel.baluta@....com>,
        linux-kernel@...r.kernel.org, sound-open-firmware@...a-project.org
Subject: Re: [PATCH v4 01/11] ASoC: SOF: core: add 'no_wq' probe and remove
 callbacks


> +static inline int snd_sof_remove_no_wq(struct snd_sof_dev *sdev)
> +{
> +	if (sof_ops(sdev)->remove_no_wq)
> +		return sof_ops(sdev)->remove_no_wq(sdev);
> +
> +	return 0;
> +}

>  	/* probe/remove/shutdown */
> +	int (*probe_no_wq)(struct snd_sof_dev *sof_dev); /* optional */
> +	int (*remove_no_wq)(struct snd_sof_dev *sof_dev); /* optional */

My initial PR didn't have this remove_no_wq() callback.

For symmetry it could be useful if it is meant to undo what the
probe_no_wq() did, but conceptually the first thing we do in the remove
is make sure that workqueue is either not scheduled or we wait until it
completes.

int snd_sof_device_remove(struct device *dev)
{
	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
	struct snd_sof_pdata *pdata = sdev->pdata;
	int ret;

	if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE))
		cancel_work_sync(&sdev->probe_work);