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[ALSA] alsa core: add struct device pointer to struct snd_pcm 

This patch adds a struct device pointer to struct snd_pcm in order to be
able to give it a different device than the card. It defaults to the card's
device, however, so it should behave identically for drivers not touching
the field.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Johannes Berg 2006-10-05 15:06:34 +02:00 committed by Jaroslav Kysela
parent 12b131c4cf
commit c78085fcd2
2 changed files with 14 additions and 5 deletions
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1
include/sound/pcm.h
View File

@ -427,6 +427,7 @@ struct snd_pcm {
wait_queue_head_t open_wait;
void *private_data;
void (*private_free) (struct snd_pcm *pcm);
struct device *dev; /* actual hw device this belongs to */
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
struct snd_pcm_oss oss;
#endif

18
sound/core/pcm.c
View File

@ -944,6 +944,7 @@ static int snd_pcm_dev_register(struct snd_device *device)
struct list_head *list;
char str[16];
struct snd_pcm *pcm = device->device_data;
struct device *dev;
snd_assert(pcm != NULL && device != NULL, return -ENXIO);
mutex_lock(&register_mutex);
@ -966,11 +967,18 @@ static int snd_pcm_dev_register(struct snd_device *device)
devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE;
break;
}
if ((err = snd_register_device(devtype, pcm->card,
pcm->device,
&snd_pcm_f_ops[cidx],
pcm, str)) < 0)
{
/* device pointer to use, pcm->dev takes precedence if
* it is assigned, otherwise fall back to card's device
* if possible */
dev = pcm->dev;
if (!dev)
dev = pcm->card ? pcm->card->dev : NULL;
/* register pcm */
err = snd_register_device_for_dev(devtype, pcm->card,
pcm->device,
&snd_pcm_f_ops[cidx],
pcm, str, dev);
if (err < 0) {
list_del(&pcm->list);
mutex_unlock(&register_mutex);
return err;