Commit 40a4b263 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: Simplify snd_device_register() variants 



Now that all callers have been replaced with
snd_device_register_for_dev(), let's drop the obsolete device
registration code and concentrate only on the code handling struct
device directly.  That said,

- remove the old snd_device_register(),
- rename snd_device_register_for_dev() with snd_device_register(),
- drop superfluous arguments from snd_device_register(),
- change snd_unregister_device() to pass the device pointer directly

Reviewed-by: default avatarJaroslav Kysela <perex@perex.cz>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 04c5d5a4

include/sound/core.h

+4 −35
Original line number Diff line number Diff line
@@ -187,7 +187,6 @@ struct snd_minor { 
	int type;			/* SNDRV_DEVICE_TYPE_XXX */

	int card;			/* card number */

	int device;			/* device number */

	bool created;

	const struct file_operations *f_ops;	/* file operations */

	void *private_data;		/* private data for f_ops->open */

	struct device *dev;		/* device for sysfs */
@@ -210,40 +209,10 @@ void snd_request_card(int card); 


void snd_device_initialize(struct device *dev, struct snd_card *card);



int snd_register_device_for_dev(int type, struct snd_card *card, int dev,

int snd_register_device(int type, struct snd_card *card, int dev,

			const struct file_operations *f_ops,

				void *private_data, struct device *device,

				struct device *parent, const char *name);



/**

 * snd_register_device - Register the ALSA device file for the card

 * @type: the device type, SNDRV_DEVICE_TYPE_XXX

 * @card: the card instance

 * @dev: the device index

 * @f_ops: the file operations

 * @private_data: user pointer for f_ops->open()

 * @name: the device file name

 *

 * Registers an ALSA device file for the given card.

 * The operators have to be set in reg parameter.

 *

 * This function uses the card's device pointer to link to the

 * correct &struct device.

 *

 * Return: Zero if successful, or a negative error code on failure.

 */

static inline int snd_register_device(int type, struct snd_card *card, int dev,

				      const struct file_operations *f_ops,

				      void *private_data,

				      const char *name)

{

	return snd_register_device_for_dev(type, card, dev, f_ops,

					   private_data, NULL,

					   snd_card_get_device_link(card),

					   name);

}



int snd_unregister_device(int type, struct snd_card *card, int dev);

			void *private_data, struct device *device);

int snd_unregister_device(struct device *dev);

void *snd_lookup_minor_data(unsigned int minor, int type);

struct device *snd_get_device(int type, struct snd_card *card, int dev);

sound/core/compress_offload.c

+4 −6
Original line number Diff line number Diff line
@@ -871,10 +871,9 @@ static int snd_compress_dev_register(struct snd_device *device) 
	pr_debug("reg %s for device %s, direction %d\n", str, compr->name,

			compr->direction);

	/* register compressed device */

	ret = snd_register_device_for_dev(SNDRV_DEVICE_TYPE_COMPRESS,

	ret = snd_register_device(SNDRV_DEVICE_TYPE_COMPRESS,

				  compr->card, compr->device,

					  &snd_compr_file_ops, compr,

					  &compr->dev, NULL, NULL);

				  &snd_compr_file_ops, compr, &compr->dev);

	if (ret < 0) {

		pr_err("snd_register_device failed\n %d", ret);

		return ret;
@@ -888,8 +887,7 @@ static int snd_compress_dev_disconnect(struct snd_device *device) 
	struct snd_compr *compr;



	compr = device->device_data;

	snd_unregister_device(SNDRV_DEVICE_TYPE_COMPRESS, compr->card,

		compr->device);

	snd_unregister_device(&compr->dev);

	return 0;

}

sound/core/control.c

+3 −4
Original line number Diff line number Diff line
@@ -1661,9 +1661,8 @@ static int snd_ctl_dev_register(struct snd_device *device) 
{

	struct snd_card *card = device->device_data;



	return snd_register_device_for_dev(SNDRV_DEVICE_TYPE_CONTROL, card,

					   -1, &snd_ctl_f_ops, card,

					   &card->ctl_dev, NULL, NULL);

	return snd_register_device(SNDRV_DEVICE_TYPE_CONTROL, card, -1,

				   &snd_ctl_f_ops, card, &card->ctl_dev);

}



/*
@@ -1681,7 +1680,7 @@ static int snd_ctl_dev_disconnect(struct snd_device *device) 
	}

	read_unlock(&card->ctl_files_rwlock);



	return snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL, card, -1);

	return snd_unregister_device(&card->ctl_dev);

}



/*

sound/core/hwdep.c

+4 −5
Original line number Diff line number Diff line
@@ -432,10 +432,9 @@ static int snd_hwdep_dev_register(struct snd_device *device) 
		return -EBUSY;

	}

	list_add_tail(&hwdep->list, &snd_hwdep_devices);

	err = snd_register_device_for_dev(SNDRV_DEVICE_TYPE_HWDEP,

	err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,

				  hwdep->card, hwdep->device,

					  &snd_hwdep_f_ops, hwdep,

					  &hwdep->dev, NULL, NULL);

				  &snd_hwdep_f_ops, hwdep, &hwdep->dev);

	if (err < 0) {

		dev_err(&hwdep->dev, "unable to register\n");

		list_del(&hwdep->list);
@@ -480,7 +479,7 @@ static int snd_hwdep_dev_disconnect(struct snd_device *device) 
	if (hwdep->ossreg)

		snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);

#endif

	snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);

	snd_unregister_device(&hwdep->dev);

	list_del_init(&hwdep->list);

	mutex_unlock(&hwdep->open_mutex);

	mutex_unlock(&register_mutex);

sound/core/pcm.c

+5 −16
Original line number Diff line number Diff line
@@ -1105,11 +1105,9 @@ static int snd_pcm_dev_register(struct snd_device *device) 
			break;

		}

		/* register pcm */

		err = snd_register_device_for_dev(devtype, pcm->card,

						  pcm->device,

						  &snd_pcm_f_ops[cidx],

						  pcm, &pcm->streams[cidx].dev,

						  NULL, NULL);

		err = snd_register_device(devtype, pcm->card, pcm->device,

					  &snd_pcm_f_ops[cidx], pcm,

					  &pcm->streams[cidx].dev);

		if (err < 0) {

			list_del(&pcm->list);

			mutex_unlock(&register_mutex);
@@ -1132,7 +1130,7 @@ static int snd_pcm_dev_disconnect(struct snd_device *device) 
	struct snd_pcm *pcm = device->device_data;

	struct snd_pcm_notify *notify;

	struct snd_pcm_substream *substream;

	int cidx, devtype;

	int cidx;



	mutex_lock(&register_mutex);

	if (list_empty(&pcm->list))
@@ -1155,16 +1153,7 @@ static int snd_pcm_dev_disconnect(struct snd_device *device) 
		notify->n_disconnect(pcm);

	}

	for (cidx = 0; cidx < 2; cidx++) {

		devtype = -1;

		switch (cidx) {

		case SNDRV_PCM_STREAM_PLAYBACK:

			devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK;

			break;

		case SNDRV_PCM_STREAM_CAPTURE:

			devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE;

			break;

		}

		snd_unregister_device(devtype, pcm->card, pcm->device);

		snd_unregister_device(&pcm->streams[cidx].dev);

		if (pcm->streams[cidx].chmap_kctl) {

			snd_ctl_remove(pcm->card, pcm->streams[cidx].chmap_kctl);

			pcm->streams[cidx].chmap_kctl = NULL;

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