sound: rawmidi: record a substream's owner process

Record the pid of the task that opened a RawMIDI substream.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/sound/rawmidi.h b/include/sound/rawmidi.h
index c23c26585700..2480e7d10dcf 100644
--- a/include/sound/rawmidi.h
+++ b/include/sound/rawmidi.h
@@ -46,6 +46,7 @@
 struct snd_rawmidi;
 struct snd_rawmidi_substream;
 struct snd_seq_port_info;
+struct pid;
 
 struct snd_rawmidi_ops {
         int (*open) (struct snd_rawmidi_substream * substream);
@@ -97,6 +98,7 @@ struct snd_rawmidi_substream {
         struct snd_rawmidi_str *pstr;
         char name[32];
         struct snd_rawmidi_runtime *runtime;
+        struct pid *pid;
         /* hardware layer */
         struct snd_rawmidi_ops *ops;
 };