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ALSA: hdsp: Replace tasklet with work

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The tasklet is an old API that should be deprecated, usually can be
converted to another decent API.  In HDSP 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 driver with a simple
work.  The conversion is fairly straightforward.  The only significant
difference is that a superfluous tasklet_kill() call is removed from
snd_hdap_midi_input_trigger().

Link: https://lore.kernel.org/r/20200903104131.21097-7-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2020-09-03 12:41:26 +02:00
parent 6053a71247
commit 4adab848ae
1 changed files with 27 additions and 28 deletions
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55
sound/pci/rme9652/hdsp.c
View file

@ -447,8 +447,8 @@ struct hdsp {
struct snd_pcm_substream *capture_substream;
struct snd_pcm_substream *playback_substream;
struct hdsp_midi midi[2];
struct tasklet_struct midi_tasklet;
int use_midi_tasklet;
struct work_struct midi_work;
int use_midi_work;
int precise_ptr;
u32 control_register; /* cached value */
u32 control2_register; /* cached value */
@ -1385,7 +1385,6 @@ static void snd_hdsp_midi_input_trigger(struct snd_rawmidi_substream *substream,
}
} else {
hdsp->control_register &= ~ie;
tasklet_kill(&hdsp->midi_tasklet);
}
hdsp_write(hdsp, HDSP_controlRegister, hdsp->control_register);
@ -2542,37 +2541,37 @@ static int snd_hdsp_put_precise_pointer(struct snd_kcontrol *kcontrol, struct sn
return change;
}
#define HDSP_USE_MIDI_TASKLET(xname, xindex) \
#define HDSP_USE_MIDI_WORK(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_CARD, \
.name = xname, \
.index = xindex, \
.info = snd_hdsp_info_use_midi_tasklet, \
.get = snd_hdsp_get_use_midi_tasklet, \
.put = snd_hdsp_put_use_midi_tasklet \
.info = snd_hdsp_info_use_midi_work, \
.get = snd_hdsp_get_use_midi_work, \
.put = snd_hdsp_put_use_midi_work \
}
static int hdsp_set_use_midi_tasklet(struct hdsp *hdsp, int use_tasklet)
static int hdsp_set_use_midi_work(struct hdsp *hdsp, int use_work)
{
if (use_tasklet)
hdsp->use_midi_tasklet = 1;
if (use_work)
hdsp->use_midi_work = 1;
else
hdsp->use_midi_tasklet = 0;
hdsp->use_midi_work = 0;
return 0;
}
#define snd_hdsp_info_use_midi_tasklet snd_ctl_boolean_mono_info
#define snd_hdsp_info_use_midi_work snd_ctl_boolean_mono_info
static int snd_hdsp_get_use_midi_tasklet(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
static int snd_hdsp_get_use_midi_work(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct hdsp *hdsp = snd_kcontrol_chip(kcontrol);
spin_lock_irq(&hdsp->lock);
ucontrol->value.integer.value[0] = hdsp->use_midi_tasklet;
ucontrol->value.integer.value[0] = hdsp->use_midi_work;
spin_unlock_irq(&hdsp->lock);
return 0;
}
static int snd_hdsp_put_use_midi_tasklet(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
static int snd_hdsp_put_use_midi_work(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct hdsp *hdsp = snd_kcontrol_chip(kcontrol);
int change;
@ -2582,8 +2581,8 @@ static int snd_hdsp_put_use_midi_tasklet(struct snd_kcontrol *kcontrol, struct s
return -EBUSY;
val = ucontrol->value.integer.value[0] & 1;
spin_lock_irq(&hdsp->lock);
change = (int)val != hdsp->use_midi_tasklet;
hdsp_set_use_midi_tasklet(hdsp, val);
change = (int)val != hdsp->use_midi_work;
hdsp_set_use_midi_work(hdsp, val);
spin_unlock_irq(&hdsp->lock);
return change;
}
@ -2950,7 +2949,7 @@ HDSP_SPDIF_SYNC_CHECK("SPDIF Lock Status", 0),
HDSP_ADATSYNC_SYNC_CHECK("ADAT Sync Lock Status", 0),
HDSP_TOGGLE_SETTING("Line Out", HDSP_LineOut),
HDSP_PRECISE_POINTER("Precise Pointer", 0),
HDSP_USE_MIDI_TASKLET("Use Midi Tasklet", 0),
HDSP_USE_MIDI_WORK("Use Midi Tasklet", 0),
};
@ -3370,7 +3369,7 @@ snd_hdsp_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
snd_iprintf(buffer, "MIDI1 Input status: 0x%x\n", hdsp_read(hdsp, HDSP_midiStatusIn0));
snd_iprintf(buffer, "MIDI2 Output status: 0x%x\n", hdsp_read(hdsp, HDSP_midiStatusOut1));
snd_iprintf(buffer, "MIDI2 Input status: 0x%x\n", hdsp_read(hdsp, HDSP_midiStatusIn1));
snd_iprintf(buffer, "Use Midi Tasklet: %s\n", hdsp->use_midi_tasklet ? "on" : "off");
snd_iprintf(buffer, "Use Midi Tasklet: %s\n", hdsp->use_midi_work ? "on" : "off");
snd_iprintf(buffer, "\n");
@ -3791,9 +3790,9 @@ static int snd_hdsp_set_defaults(struct hdsp *hdsp)
return 0;
}
static void hdsp_midi_tasklet(struct tasklet_struct *t)
static void hdsp_midi_work(struct work_struct *work)
{
struct hdsp *hdsp = from_tasklet(hdsp, t, midi_tasklet);
struct hdsp *hdsp = container_of(work, struct hdsp, midi_work);
if (hdsp->midi[0].pending)
snd_hdsp_midi_input_read (&hdsp->midi[0]);
@ -3838,7 +3837,7 @@ static irqreturn_t snd_hdsp_interrupt(int irq, void *dev_id)
}
if (midi0 && midi0status) {
if (hdsp->use_midi_tasklet) {
if (hdsp->use_midi_work) {
/* we disable interrupts for this input until processing is done */
hdsp->control_register &= ~HDSP_Midi0InterruptEnable;
hdsp_write(hdsp, HDSP_controlRegister, hdsp->control_register);
@ -3849,7 +3848,7 @@ static irqreturn_t snd_hdsp_interrupt(int irq, void *dev_id)
}
}
if (hdsp->io_type != Multiface && hdsp->io_type != RPM && hdsp->io_type != H9632 && midi1 && midi1status) {
if (hdsp->use_midi_tasklet) {
if (hdsp->use_midi_work) {
/* we disable interrupts for this input until processing is done */
hdsp->control_register &= ~HDSP_Midi1InterruptEnable;
hdsp_write(hdsp, HDSP_controlRegister, hdsp->control_register);
@ -3859,8 +3858,8 @@ static irqreturn_t snd_hdsp_interrupt(int irq, void *dev_id)
snd_hdsp_midi_input_read (&hdsp->midi[1]);
}
}
if (hdsp->use_midi_tasklet && schedule)
tasklet_schedule(&hdsp->midi_tasklet);
if (hdsp->use_midi_work && schedule)
queue_work(system_highpri_wq, &hdsp->midi_work);
return IRQ_HANDLED;
}
@ -5182,7 +5181,7 @@ static int snd_hdsp_create(struct snd_card *card,
spin_lock_init(&hdsp->lock);
tasklet_setup(&hdsp->midi_tasklet, hdsp_midi_tasklet);
INIT_WORK(&hdsp->midi_work, hdsp_midi_work);
pci_read_config_word(hdsp->pci, PCI_CLASS_REVISION, &hdsp->firmware_rev);
hdsp->firmware_rev &= 0xff;
@ -5235,7 +5234,7 @@ static int snd_hdsp_create(struct snd_card *card,
hdsp->irq = pci->irq;
card->sync_irq = hdsp->irq;
hdsp->precise_ptr = 0;
hdsp->use_midi_tasklet = 1;
hdsp->use_midi_work = 1;
hdsp->dds_value = 0;
if ((err = snd_hdsp_initialize_memory(hdsp)) < 0)
@ -5305,7 +5304,7 @@ static int snd_hdsp_free(struct hdsp *hdsp)
{
if (hdsp->port) {
/* stop the audio, and cancel all interrupts */
tasklet_kill(&hdsp->midi_tasklet);
cancel_work_sync(&hdsp->midi_work);
hdsp->control_register &= ~(HDSP_Start|HDSP_AudioInterruptEnable|HDSP_Midi0InterruptEnable|HDSP_Midi1InterruptEnable);
hdsp_write (hdsp, HDSP_controlRegister, hdsp->control_register);
}