Re: [PATCH v4 01/11] ASoC: SOF: core: add 'no_wq' probe and remove callbacks

[Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>]

> +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);