diff options
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 66 | ||||
| -rw-r--r-- | sound/pci/hda/hda_codec.h | 3 |
2 files changed, 42 insertions, 27 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index c556fe1..2fb935d 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -2247,24 +2247,50 @@ void snd_hda_ctls_clear(struct hda_codec *codec) /* pseudo device locking * toggle card->shutdown to allow/disallow the device access (as a hack) */ -static int hda_lock_devices(struct snd_card *card) +int snd_hda_lock_devices(struct hda_bus *bus) { + struct snd_card *card = bus->card; + struct hda_codec *codec; + spin_lock(&card->files_lock); - if (card->shutdown) { - spin_unlock(&card->files_lock); - return -EINVAL; - } + if (card->shutdown) + goto err_unlock; card->shutdown = 1; + if (!list_empty(&card->ctl_files)) + goto err_clear; + + list_for_each_entry(codec, &bus->codec_list, list) { + int pcm; + for (pcm = 0; pcm < codec->num_pcms; pcm++) { + struct hda_pcm *cpcm = &codec->pcm_info[pcm]; + if (!cpcm->pcm) + continue; + if (cpcm->pcm->streams[0].substream_opened || + cpcm->pcm->streams[1].substream_opened) + goto err_clear; + } + } spin_unlock(&card->files_lock); return 0; + + err_clear: + card->shutdown = 0; + err_unlock: + spin_unlock(&card->files_lock); + return -EINVAL; } +EXPORT_SYMBOL_HDA(snd_hda_lock_devices); -static void hda_unlock_devices(struct snd_card *card) +void snd_hda_unlock_devices(struct hda_bus *bus) { + struct snd_card *card = bus->card; + + card = bus->card; spin_lock(&card->files_lock); card->shutdown = 0; spin_unlock(&card->files_lock); } +EXPORT_SYMBOL_HDA(snd_hda_unlock_devices); /** * snd_hda_codec_reset - Clear all objects assigned to the codec @@ -2278,26 +2304,12 @@ static void hda_unlock_devices(struct snd_card *card) */ int snd_hda_codec_reset(struct hda_codec *codec) { - struct snd_card *card = codec->bus->card; - int i, pcm; + struct hda_bus *bus = codec->bus; + struct snd_card *card = bus->card; + int i; - if (hda_lock_devices(card) < 0) - return -EBUSY; - /* check whether the codec isn't used by any mixer or PCM streams */ - if (!list_empty(&card->ctl_files)) { - hda_unlock_devices(card); + if (snd_hda_lock_devices(bus) < 0) return -EBUSY; - } - for (pcm = 0; pcm < codec->num_pcms; pcm++) { - struct hda_pcm *cpcm = &codec->pcm_info[pcm]; - if (!cpcm->pcm) - continue; - if (cpcm->pcm->streams[0].substream_opened || - cpcm->pcm->streams[1].substream_opened) { - hda_unlock_devices(card); - return -EBUSY; - } - } /* OK, let it free */ @@ -2306,7 +2318,7 @@ int snd_hda_codec_reset(struct hda_codec *codec) codec->power_on = 0; codec->power_transition = 0; codec->power_jiffies = jiffies; - flush_workqueue(codec->bus->workq); + flush_workqueue(bus->workq); #endif snd_hda_ctls_clear(codec); /* relase PCMs */ @@ -2314,7 +2326,7 @@ int snd_hda_codec_reset(struct hda_codec *codec) if (codec->pcm_info[i].pcm) { snd_device_free(card, codec->pcm_info[i].pcm); clear_bit(codec->pcm_info[i].device, - codec->bus->pcm_dev_bits); + bus->pcm_dev_bits); } } if (codec->patch_ops.free) @@ -2339,7 +2351,7 @@ int snd_hda_codec_reset(struct hda_codec *codec) codec->owner = NULL; /* allow device access again */ - hda_unlock_devices(card); + snd_hda_unlock_devices(bus); return 0; } diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h index 29a311b..be91cdb 100644 --- a/sound/pci/hda/hda_codec.h +++ b/sound/pci/hda/hda_codec.h @@ -1020,6 +1020,9 @@ void snd_hda_codec_set_power_to_all(struct hda_codec *codec, hda_nid_t fg, unsigned int power_state, bool eapd_workaround); +int snd_hda_lock_devices(struct hda_bus *bus); +void snd_hda_unlock_devices(struct hda_bus *bus); + /* * power management */ |
