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| author | Clemens Ladisch <clemens@ladisch.de> | 2009-11-10 09:14:04 (GMT) |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-11-10 15:32:38 (GMT) |
| commit | 7584af10cf46e0f4aa1696f1be79fa0f19a945ba (patch) | |
| tree | e40065330c913b3c5a79da0080444cea761816d7 | |
| parent | e7373b702f6eab35f315e016a4159860a7a4d686 (diff) | |
| download | linux-7584af10cf46e0f4aa1696f1be79fa0f19a945ba.tar.xz | |
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.h | 2 | ||||
| -rw-r--r-- | sound/core/rawmidi.c | 9 |
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" |