summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorClemens Ladisch <clemens@ladisch.de>2009-11-10 10:14:04 +0100
committerTakashi Iwai <tiwai@suse.de>2009-11-10 16:32:38 +0100
commit7584af10cf46e0f4aa1696f1be79fa0f19a945ba (patch)
treee40065330c913b3c5a79da0080444cea761816d7
parente7373b702f6eab35f315e016a4159860a7a4d686 (diff)
downloadop-kernel-dev-7584af10cf46e0f4aa1696f1be79fa0f19a945ba.zip
op-kernel-dev-7584af10cf46e0f4aa1696f1be79fa0f19a945ba.tar.gz
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>
-rw-r--r--include/sound/rawmidi.h2
-rw-r--r--sound/core/rawmidi.c9
2 files changed, 11 insertions, 0 deletions
diff --git a/include/sound/rawmidi.h b/include/sound/rawmidi.h
index c23c265..2480e7d 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;
};
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index 818b129..2f76612 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -278,6 +278,7 @@ static int open_substream(struct snd_rawmidi *rmidi,
substream->active_sensing = 0;
if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
substream->append = 1;
+ substream->pid = get_pid(task_pid(current));
rmidi->streams[substream->stream].substream_opened++;
}
substream->use_count++;
@@ -488,6 +489,8 @@ static void close_substream(struct snd_rawmidi *rmidi,
snd_rawmidi_runtime_free(substream);
substream->opened = 0;
substream->append = 0;
+ put_pid(substream->pid);
+ substream->pid = NULL;
rmidi->streams[substream->stream].substream_opened--;
}
@@ -1336,6 +1339,9 @@ static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
substream->number,
(unsigned long) substream->bytes);
if (substream->opened) {
+ snd_iprintf(buffer,
+ " Owner PID : %d\n",
+ pid_vnr(substream->pid));
runtime = substream->runtime;
snd_iprintf(buffer,
" Mode : %s\n"
@@ -1357,6 +1363,9 @@ static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
substream->number,
(unsigned long) substream->bytes);
if (substream->opened) {
+ snd_iprintf(buffer,
+ " Owner PID : %d\n",
+ pid_vnr(substream->pid));
runtime = substream->runtime;
snd_iprintf(buffer,
" Buffer size : %lu\n"
OpenPOWER on IntegriCloud