diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2012-11-05 14:58:32 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2012-11-05 14:58:32 +0000 |
| commit | 3fd9396af83a1e69eaf9ebb573207431d8f265b6 (patch) | |
| tree | f221f5777695de71ea97423c67438bca1746e26c /sound/core/sound_oss.c | |
| parent | e3978cded41dc7b364e74037f56d6bc558c11fd7 (diff) | |
| parent | 3d70f8c617a436c7146ecb81df2265b4626dfe89 (diff) | |
Merge tag 'v3.7-rc4' into upstream-master
Linux 3.7-rc4
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 e9528333e36d0..e1d79ee359065 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); |