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ASoC DPCM lockdep fixes

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Merge series from Takashi Iwai <tiwai@suse.de>:

This is the revised patches for addressing ASoC lockdep warnings due
to the recent DPCM locking refactoring.
This commit is contained in:
Mark Brown 2022-01-28 20:45:33 +00:00
commit 4c38f8747c
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
3 changed files with 41 additions and 7 deletions
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15
include/sound/pcm.h
View File

@ -614,6 +614,7 @@ void snd_pcm_stream_unlock(struct snd_pcm_substream *substream);
void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream);
void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream);
unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream);
unsigned long _snd_pcm_stream_lock_irqsave_nested(struct snd_pcm_substream *substream);
/**
* snd_pcm_stream_lock_irqsave - Lock the PCM stream
@ -632,6 +633,20 @@ unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream);
void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
unsigned long flags);
/**
* snd_pcm_stream_lock_irqsave_nested - Single-nested PCM stream locking
* @substream: PCM substream
* @flags: irq flags
*
* This locks the PCM stream like snd_pcm_stream_lock_irqsave() but with
* the single-depth lockdep subclass.
*/
#define snd_pcm_stream_lock_irqsave_nested(substream, flags) \
do { \
typecheck(unsigned long, flags); \
flags = _snd_pcm_stream_lock_irqsave_nested(substream); \
} while (0)
/**
* snd_pcm_group_for_each_entry - iterate over the linked substreams
* @s: the iterator

13
sound/core/pcm_native.c
View File

@ -172,6 +172,19 @@ unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
}
EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
unsigned long _snd_pcm_stream_lock_irqsave_nested(struct snd_pcm_substream *substream)
{
unsigned long flags = 0;
if (substream->pcm->nonatomic)
mutex_lock_nested(&substream->self_group.mutex,
SINGLE_DEPTH_NESTING);
else
spin_lock_irqsave_nested(&substream->self_group.lock, flags,
SINGLE_DEPTH_NESTING);
return flags;
}
EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave_nested);
/**
* snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
* @substream: PCM substream

20
sound/soc/soc-pcm.c
View File

@ -46,8 +46,8 @@ static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd,
snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream));
}
#define snd_soc_dpcm_stream_lock_irqsave(rtd, stream, flags) \
snd_pcm_stream_lock_irqsave(snd_soc_dpcm_get_substream(rtd, stream), flags)
#define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \
snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags)
static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd,
int stream)
@ -1268,6 +1268,7 @@ static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
{
struct snd_soc_dpcm *dpcm, *d;
LIST_HEAD(deleted_dpcms);
snd_soc_dpcm_mutex_assert_held(fe);
@ -1287,13 +1288,18 @@ void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
/* BEs still alive need new FE */
dpcm_be_reparent(fe, dpcm->be, stream);
dpcm_remove_debugfs_state(dpcm);
list_del(&dpcm->list_be);
list_del(&dpcm->list_fe);
kfree(dpcm);
list_move(&dpcm->list_fe, &deleted_dpcms);
}
snd_soc_dpcm_stream_unlock_irq(fe, stream);
while (!list_empty(&deleted_dpcms)) {
dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm,
list_fe);
list_del(&dpcm->list_fe);
dpcm_remove_debugfs_state(dpcm);
kfree(dpcm);
}
}
/* get BE for DAI widget and stream */
@ -2094,7 +2100,7 @@ int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
be = dpcm->be;
be_substream = snd_soc_dpcm_get_substream(be, stream);
snd_soc_dpcm_stream_lock_irqsave(be, stream, flags);
snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags);
/* is this op for this BE ? */
if (!snd_soc_dpcm_be_can_update(fe, be, stream))