提交 c78085fc 编写于 作者: J Johannes Berg 提交者: Jaroslav Kysela

[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: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>
上级 12b131c4
......@@ -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
......
......@@ -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;
......
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