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ASoC: soc-pcm: fix state tracking error in snd_soc_component_open/close()

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ASoC component open/close and snd_soc_component_module_get/put are called
independently for each component-substream pair, so the logic added in
commit dd03907bf1 ("ASoC: soc-pcm: call snd_soc_component_open/close()
once") was not sufficient and led to PCM playback and module unload errors.

Implement handling of failures directly in soc_pcm_components_open(),
so that any successfully opened components are closed upon error with
other components. This allows to clean up error handling in
soc_pcm_open() without adding more state tracking.

Fixes: dd03907bf1 ("ASoC: soc-pcm: call snd_soc_component_open/close() once")
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20200220094955.16968-1-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kai Vehmanen 2020-02-20 11:49:55 +02:00 committed by Mark Brown
parent 1640c8df0b
commit d2aaa8d8bf
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
3 changed files with 30 additions and 39 deletions
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7
include/sound/soc-component.h
View File

@ -147,6 +147,8 @@ struct snd_soc_component {
unsigned int active;
unsigned int suspended:1; /* is in suspend PM state */
struct list_head list;
struct list_head card_aux_list; /* for auxiliary bound components */
struct list_head card_list;
@ -180,11 +182,6 @@ struct snd_soc_component {
struct dentry *debugfs_root;
const char *debugfs_prefix;
#endif
/* bit field */
unsigned int suspended:1; /* is in suspend PM state */
unsigned int opened:1;
unsigned int module:1;
};
#define for_each_component_dais(component, dai)\

35
sound/soc/soc-component.c
View File

@ -297,55 +297,34 @@ EXPORT_SYMBOL_GPL(snd_soc_component_set_jack);
int snd_soc_component_module_get(struct snd_soc_component *component,
int upon_open)
{
if (component->module)
return 0;
if (component->driver->module_get_upon_open == !!upon_open &&
!try_module_get(component->dev->driver->owner))
return -ENODEV;
component->module = 1;
return 0;
}
void snd_soc_component_module_put(struct snd_soc_component *component,
int upon_open)
{
if (component->module &&
component->driver->module_get_upon_open == !!upon_open)
if (component->driver->module_get_upon_open == !!upon_open)
module_put(component->dev->driver->owner);
component->module = 0;
}
int snd_soc_component_open(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
int ret = 0;
if (!component->opened &&
component->driver->open)
ret = component->driver->open(component, substream);
if (ret == 0)
component->opened = 1;
return ret;
if (component->driver->open)
return component->driver->open(component, substream);
return 0;
}
int snd_soc_component_close(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
int ret = 0;
if (component->opened &&
component->driver->close)
ret = component->driver->close(component, substream);
component->opened = 0;
return ret;
if (component->driver->close)
return component->driver->close(component, substream);
return 0;
}
int snd_soc_component_prepare(struct snd_soc_component *component,

27
sound/soc/soc-pcm.c
View File

@ -469,28 +469,43 @@ static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
static int soc_pcm_components_open(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *last = NULL;
struct snd_soc_component *component;
int i, ret = 0;
for_each_rtd_components(rtd, i, component) {
last = component;
ret = snd_soc_component_module_get_when_open(component);
if (ret < 0) {
dev_err(component->dev,
"ASoC: can't get module %s\n",
component->name);
return ret;
break;
}
ret = snd_soc_component_open(component, substream);
if (ret < 0) {
snd_soc_component_module_put_when_close(component);
dev_err(component->dev,
"ASoC: can't open component %s: %d\n",
component->name, ret);
return ret;
break;
}
}
return 0;
if (ret < 0) {
/* rollback on error */
for_each_rtd_components(rtd, i, component) {
if (component == last)
break;
snd_soc_component_close(component, substream);
snd_soc_component_module_put_when_close(component);
}
}
return ret;
}
static int soc_pcm_components_close(struct snd_pcm_substream *substream)
@ -585,7 +600,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
if (ret < 0) {
pr_err("ASoC: %s startup failed: %d\n",
rtd->dai_link->name, ret);
goto component_err;
goto rtd_startup_err;
}
/* startup the audio subsystem */
@ -681,9 +696,9 @@ cpu_dai_err:
snd_soc_dai_shutdown(cpu_dai, substream);
soc_rtd_shutdown(rtd, substream);
component_err:
rtd_startup_err:
soc_pcm_components_close(substream);
component_err:
mutex_unlock(&rtd->card->pcm_mutex);
for_each_rtd_components(rtd, i, component) {