[ALSA] pcm core: add prealloc_max file to substream directory to show maximum DMA size

Users ask us many times about the maximum DMA size for PCM devices. This
file gives them a hint in KB.

Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 1 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;