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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-14 15:01:02 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-14 15:01:02 -0800 |
| commit | ecdca043ebe8e3172e0400d0966831e2e60870a0 (patch) | |
| tree | c1433e2399f544970e1f9ae7a469dbc9172c8e9f /sound/core/sound_oss.c | |
| parent | bb3215e97bb1ab917ed858322a9399fb32e69e49 (diff) | |
| parent | 77b67063bb6bce6d475e910d3b886a606d0d91f7 (diff) | |
| download | blackbird-op-linux-ecdca043ebe8e3172e0400d0966831e2e60870a0.tar.gz blackbird-op-linux-ecdca043ebe8e3172e0400d0966831e2e60870a0.zip | |
Merge 3.7-rc5 into driver-core-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 e9528333e36d..726a49ac9725 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 (private_data && 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); |
