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@@ -372,14 +372,17 @@ static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry,
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struct snd_info_buffer *buffer)
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{
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struct snd_pcm_substream *substream = entry->private_data;
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- struct snd_pcm_runtime *runtime = substream->runtime;
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+ struct snd_pcm_runtime *runtime;
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+
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+ mutex_lock(&substream->pcm->open_mutex);
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+ runtime = substream->runtime;
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if (!runtime) {
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snd_iprintf(buffer, "closed\n");
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- return;
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+ goto unlock;
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}
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if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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snd_iprintf(buffer, "no setup\n");
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- return;
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+ goto unlock;
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}
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snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access));
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snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format));
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@@ -398,20 +401,25 @@ static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry,
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snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames);
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}
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#endif
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+ unlock:
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+ mutex_unlock(&substream->pcm->open_mutex);
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}
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static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry,
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struct snd_info_buffer *buffer)
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{
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struct snd_pcm_substream *substream = entry->private_data;
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- struct snd_pcm_runtime *runtime = substream->runtime;
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+ struct snd_pcm_runtime *runtime;
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+
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+ mutex_lock(&substream->pcm->open_mutex);
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+ runtime = substream->runtime;
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if (!runtime) {
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snd_iprintf(buffer, "closed\n");
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- return;
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+ goto unlock;
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}
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if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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snd_iprintf(buffer, "no setup\n");
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- return;
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+ goto unlock;
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}
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snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode));
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snd_iprintf(buffer, "period_step: %u\n", runtime->period_step);
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@@ -421,24 +429,29 @@ static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry,
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snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold);
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snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size);
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snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary);
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+ unlock:
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+ mutex_unlock(&substream->pcm->open_mutex);
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}
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static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry,
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struct snd_info_buffer *buffer)
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{
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struct snd_pcm_substream *substream = entry->private_data;
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- struct snd_pcm_runtime *runtime = substream->runtime;
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+ struct snd_pcm_runtime *runtime;
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struct snd_pcm_status status;
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int err;
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+
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+ mutex_lock(&substream->pcm->open_mutex);
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+ runtime = substream->runtime;
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if (!runtime) {
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snd_iprintf(buffer, "closed\n");
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- return;
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+ goto unlock;
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}
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memset(&status, 0, sizeof(status));
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err = snd_pcm_status(substream, &status);
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if (err < 0) {
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snd_iprintf(buffer, "error %d\n", err);
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- return;
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+ goto unlock;
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}
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snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state));
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snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid));
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@@ -452,6 +465,8 @@ static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry,
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snd_iprintf(buffer, "-----\n");
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snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr);
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snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr);
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+ unlock:
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+ mutex_unlock(&substream->pcm->open_mutex);
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}
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#ifdef CONFIG_SND_PCM_XRUN_DEBUG
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