ALSA: hda - Allocate hda_pcm objects dynamically
So far, the hda_codec object kept the hda_pcm list in an array, and
the codec driver was expected to assign the array. However, this
makes the object life cycle management harder, because the assigned
array is freed at the codec driver detach while it might be still
accessed by the opened streams.
In this patch, we allocate each hda_pcm object dynamically and manage
it as a linked list. Each object has a kref refcount, and both the
codec driver binder and the PCM open/close touches it, so that the
object won't be freed while in use.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 0f8354c..708bbed 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -86,7 +86,6 @@
bool non_pcm;
bool chmap_set; /* channel-map override by ALSA API? */
unsigned char chmap[8]; /* ALSA API channel-map */
- char pcm_name[8]; /* filled in build_pcm callbacks */
#ifdef CONFIG_PROC_FS
struct snd_info_entry *proc_entry;
#endif
@@ -132,7 +131,7 @@
int num_pins;
struct snd_array pins; /* struct hdmi_spec_per_pin */
- struct snd_array pcm_rec; /* struct hda_pcm */
+ struct hda_pcm *pcm_rec[16];
unsigned int channels_max; /* max over all cvts */
struct hdmi_eld temp_eld;
@@ -355,8 +354,7 @@
((struct hdmi_spec_per_pin *)snd_array_elem(&spec->pins, idx))
#define get_cvt(spec, idx) \
((struct hdmi_spec_per_cvt *)snd_array_elem(&spec->cvts, idx))
-#define get_pcm_rec(spec, idx) \
- ((struct hda_pcm *)snd_array_elem(&spec->pcm_rec, idx))
+#define get_pcm_rec(spec, idx) ((spec)->pcm_rec[idx])
static int pin_nid_to_pin_index(struct hda_codec *codec, hda_nid_t pin_nid)
{
@@ -2056,11 +2054,10 @@
struct hdmi_spec_per_pin *per_pin;
per_pin = get_pin(spec, pin_idx);
- sprintf(per_pin->pcm_name, "HDMI %d", pin_idx);
- info = snd_array_new(&spec->pcm_rec);
+ info = snd_hda_codec_pcm_new(codec, "HDMI %d", pin_idx);
if (!info)
return -ENOMEM;
- info->name = per_pin->pcm_name;
+ spec->pcm_rec[pin_idx] = info;
info->pcm_type = HDA_PCM_TYPE_HDMI;
info->own_chmap = true;
@@ -2070,9 +2067,6 @@
/* other pstr fields are set in open */
}
- codec->num_pcms = spec->num_pins;
- codec->pcm_info = spec->pcm_rec.list;
-
return 0;
}
@@ -2125,13 +2119,15 @@
/* add channel maps */
for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
+ struct hda_pcm *pcm;
struct snd_pcm_chmap *chmap;
struct snd_kcontrol *kctl;
int i;
- if (!codec->pcm_info[pin_idx].pcm)
+ pcm = spec->pcm_rec[pin_idx];
+ if (!pcm || !pcm->pcm)
break;
- err = snd_pcm_add_chmap_ctls(codec->pcm_info[pin_idx].pcm,
+ err = snd_pcm_add_chmap_ctls(pcm->pcm,
SNDRV_PCM_STREAM_PLAYBACK,
NULL, 0, pin_idx, &chmap);
if (err < 0)
@@ -2186,14 +2182,12 @@
{
snd_array_init(&spec->pins, sizeof(struct hdmi_spec_per_pin), nums);
snd_array_init(&spec->cvts, sizeof(struct hdmi_spec_per_cvt), nums);
- snd_array_init(&spec->pcm_rec, sizeof(struct hda_pcm), nums);
}
static void hdmi_array_free(struct hdmi_spec *spec)
{
snd_array_free(&spec->pins);
snd_array_free(&spec->cvts);
- snd_array_free(&spec->pcm_rec);
}
static void generic_hdmi_free(struct hda_codec *codec)
@@ -2381,11 +2375,10 @@
chans = get_wcaps(codec, per_cvt->cvt_nid);
chans = get_wcaps_channels(chans);
- info = snd_array_new(&spec->pcm_rec);
+ info = snd_hda_codec_pcm_new(codec, "HDMI 0");
if (!info)
return -ENOMEM;
- info->name = get_pin(spec, 0)->pcm_name;
- sprintf(info->name, "HDMI 0");
+ spec->pcm_rec[0] = info;
info->pcm_type = HDA_PCM_TYPE_HDMI;
pstr = &info->stream[SNDRV_PCM_STREAM_PLAYBACK];
*pstr = spec->pcm_playback;
@@ -2393,9 +2386,6 @@
if (pstr->channels_max <= 2 && chans && chans <= 16)
pstr->channels_max = chans;
- codec->num_pcms = 1;
- codec->pcm_info = info;
-
return 0;
}