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authorTakashi Iwai <tiwai@suse.de>2011-06-14 14:37:06 +0200
committerTakashi Iwai <tiwai@suse.de>2011-06-14 14:37:06 +0200
commitb3c705aa9e9147a30009bdf6ba853aa7fe138e58 (patch)
tree27e1543b2a0e441a3929b51a48bf64b77c8f06b7 /sound/core
parent30bdee0259093e114c711943902c834e5c3326c5 (diff)
ALSA: rawmidi - Use workq for event handling
Kill tasklet usage in rawmidi core code. Use workq for the event callback instead of tasklet (which is used only in core/seq/seq_midi.c). Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/rawmidi.c37
1 files changed, 11 insertions, 26 deletions
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index cbbed0db9e56..0757f542999d 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -92,16 +92,12 @@ static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substre
(!substream->append || runtime->avail >= count);
}
-static void snd_rawmidi_input_event_tasklet(unsigned long data)
+static void snd_rawmidi_input_event_work(struct work_struct *work)
{
- struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
- substream->runtime->event(substream);
-}
-
-static void snd_rawmidi_output_trigger_tasklet(unsigned long data)
-{
- struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
- substream->ops->trigger(substream, 1);
+ struct snd_rawmidi_runtime *runtime =
+ container_of(work, struct snd_rawmidi_runtime, event_work);
+ if (runtime->event)
+ runtime->event(runtime->substream);
}
static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
@@ -110,16 +106,10 @@ static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL)
return -ENOMEM;
+ runtime->substream = substream;
spin_lock_init(&runtime->lock);
init_waitqueue_head(&runtime->sleep);
- if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
- tasklet_init(&runtime->tasklet,
- snd_rawmidi_input_event_tasklet,
- (unsigned long)substream);
- else
- tasklet_init(&runtime->tasklet,
- snd_rawmidi_output_trigger_tasklet,
- (unsigned long)substream);
+ INIT_WORK(&runtime->event_work, snd_rawmidi_input_event_work);
runtime->event = NULL;
runtime->buffer_size = PAGE_SIZE;
runtime->avail_min = 1;
@@ -150,12 +140,7 @@ static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *subs
{
if (!substream->opened)
return;
- if (up) {
- tasklet_schedule(&substream->runtime->tasklet);
- } else {
- tasklet_kill(&substream->runtime->tasklet);
- substream->ops->trigger(substream, 0);
- }
+ substream->ops->trigger(substream, up);
}
static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
@@ -163,8 +148,8 @@ static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, i
if (!substream->opened)
return;
substream->ops->trigger(substream, up);
- if (!up && substream->runtime->event)
- tasklet_kill(&substream->runtime->tasklet);
+ if (!up)
+ cancel_work_sync(&substream->runtime->event_work);
}
int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
@@ -926,7 +911,7 @@ int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
}
if (result > 0) {
if (runtime->event)
- tasklet_schedule(&runtime->tasklet);
+ schedule_work(&runtime->event_work);
else if (snd_rawmidi_ready(substream))
wake_up(&runtime->sleep);
}