diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-11-06 10:03:29 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-11-06 10:03:29 +0100 |
| commit | 70324494b6f283311c5339fb1795fdec2d8850d9 (patch) | |
| tree | 5a318c2b60ba6e7861d630310d1930f62b8893ce /sound/core/sound_oss.c | |
| parent | 73b5301b02c8d3456a5ea64c9ed9802a4a376af6 (diff) | |
| parent | e47a682ace0cd56eb8e09b806c2b0f034b491520 (diff) | |
Merge branch 'spi-linus' into spi-next
Diffstat (limited to 'sound/core/sound_oss.c')
| -rw-r--r-- | sound/core/sound_oss.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c index e9528333e36..e1d79ee3590 100644 --- a/sound/core/sound_oss.c +++ b/sound/core/sound_oss.c @@ -40,6 +40,9 @@ static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS]; static DEFINE_MUTEX(sound_oss_mutex); +/* NOTE: This function increments the refcount of the associated card like + * snd_lookup_minor_data(); the caller must call snd_card_unref() appropriately + */ void *snd_lookup_oss_minor_data(unsigned int minor, int type) { struct snd_minor *mreg; @@ -49,9 +52,11 @@ void *snd_lookup_oss_minor_data(unsigned int minor, int type) return NULL; mutex_lock(&sound_oss_mutex); mreg = snd_oss_minors[minor]; - if (mreg && mreg->type == type) + if (mreg && mreg->type == type) { private_data = mreg->private_data; - else + if (mreg->card_ptr) + atomic_inc(&mreg->card_ptr->refcount); + } else private_data = NULL; mutex_unlock(&sound_oss_mutex); return private_data; @@ -123,6 +128,7 @@ int snd_register_oss_device(int type, struct snd_card *card, int dev, preg->device = dev; preg->f_ops = f_ops; preg->private_data = private_data; + preg->card_ptr = card; mutex_lock(&sound_oss_mutex); snd_oss_minors[minor] = preg; minor_unit = SNDRV_MINOR_OSS_DEVICE(minor); |