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-rw-r--r--include/sound/pcm.h1
-rw-r--r--sound/core/pcm_memory.c23
2 files changed, 24 insertions, 0 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 016c41893b06..ec006ed8cd59 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -384,6 +384,7 @@ struct snd_pcm_substream {
struct snd_info_entry *proc_sw_params_entry;
struct snd_info_entry *proc_status_entry;
struct snd_info_entry *proc_prealloc_entry;
+ struct snd_info_entry *proc_prealloc_max_entry;
#endif
/* misc flags */
unsigned int hw_opened: 1;
diff --git a/sound/core/pcm_memory.c b/sound/core/pcm_memory.c
index be030cb4d373..95b1b2f0b1e2 100644
--- a/sound/core/pcm_memory.c
+++ b/sound/core/pcm_memory.c
@@ -101,6 +101,8 @@ int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream)
{
snd_pcm_lib_preallocate_dma_free(substream);
#ifdef CONFIG_SND_VERBOSE_PROCFS
+ snd_info_free_entry(substream->proc_prealloc_max_entry);
+ substream->proc_prealloc_max_entry = NULL;
snd_info_free_entry(substream->proc_prealloc_entry);
substream->proc_prealloc_entry = NULL;
#endif
@@ -142,6 +144,18 @@ static void snd_pcm_lib_preallocate_proc_read(struct snd_info_entry *entry,
}
/*
+ * read callback for prealloc_max proc file
+ *
+ * prints the maximum allowed size in kB.
+ */
+static void snd_pcm_lib_preallocate_max_proc_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct snd_pcm_substream *substream = entry->private_data;
+ snd_iprintf(buffer, "%lu\n", (unsigned long) substream->dma_max / 1024);
+}
+
+/*
* write callback for prealloc proc file
*
* accepts the preallocation size in kB.
@@ -203,6 +217,15 @@ static inline void preallocate_info_init(struct snd_pcm_substream *substream)
}
}
substream->proc_prealloc_entry = entry;
+ if ((entry = snd_info_create_card_entry(substream->pcm->card, "prealloc_max", substream->proc_root)) != NULL) {
+ entry->c.text.read = snd_pcm_lib_preallocate_max_proc_read;
+ entry->private_data = substream;
+ if (snd_info_register(entry) < 0) {
+ snd_info_free_entry(entry);
+ entry = NULL;
+ }
+ }
+ substream->proc_prealloc_max_entry = entry;
}
#else /* !CONFIG_SND_VERBOSE_PROCFS */