The tasklet is an old API that should be deprecated, usually can be
converted to another decent API. In HDSP-MADI driver, a tasklet is
still used for offloading the MIDI I/O handling (optional via mixer
switch). It can be achieved gracefully with a work queued, too.
This patch replaces the tasklet usage in HDSP-MADI driver with a
simple work. The conversion is fairly straightforward. The only
significant difference is that the work initialization is moved to the
right place in snd_hdspm_create() and cancel_work_sync() is always
called in snd_hdspm_free() to assure killing the pending works.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
sound/pci/rme9652/hdspm.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 572350aaf18d..e532312a5e1c 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -997,7 +997,7 @@ struct hdspm {
u32 settings_register; /* cached value for AIO / RayDat (sync reference, master/slave) */
struct hdspm_midi midi[4];
- struct tasklet_struct midi_tasklet;
+ struct work_struct midi_work;
size_t period_bytes;
unsigned char ss_in_channels;
@@ -2169,9 +2169,9 @@ static int snd_hdspm_create_midi(struct snd_card *card,
}
-static void hdspm_midi_tasklet(struct tasklet_struct *t)
+static void hdspm_midi_work(struct work_struct *work)
{
- struct hdspm *hdspm = from_tasklet(hdspm, t, midi_tasklet);
+ struct hdspm *hdspm = container_of(work, struct hdspm, midi_work);
int i = 0;
while (i < hdspm->midiPorts) {
@@ -5449,7 +5449,7 @@ static irqreturn_t snd_hdspm_interrupt(int irq, void *dev_id)
}
if (schedule)
- tasklet_hi_schedule(&hdspm->midi_tasklet);
+ queue_work(system_highpri_wq, &hdspm->midi_work);
}
return IRQ_HANDLED;
@@ -6538,6 +6538,7 @@ static int snd_hdspm_create(struct snd_card *card,
hdspm->card = card;
spin_lock_init(&hdspm->lock);
+ INIT_WORK(&hdspm->midi_work, hdspm_midi_work);
pci_read_config_word(hdspm->pci,
PCI_CLASS_REVISION, &hdspm->firmware_rev);
@@ -6836,9 +6837,6 @@ static int snd_hdspm_create(struct snd_card *card,
}
- tasklet_setup(&hdspm->midi_tasklet, hdspm_midi_tasklet);
-
-
if (hdspm->io_type != MADIface) {
hdspm->serial = (hdspm_read(hdspm,
HDSPM_midiStatusIn0)>>8) & 0xFFFFFF;
@@ -6873,6 +6871,7 @@ static int snd_hdspm_free(struct hdspm * hdspm)
{
if (hdspm->port) {
+ cancel_work_sync(&hdspm->midi_work);
/* stop th audio, and cancel all interrupts */
hdspm->control_register &=
--
2.16.4
