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ALSA: hda - Fix possible runtime PM refcount unbalance

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When the driver is unloaded before the codec is bound, it still keeps
the runtime PM refcount up, and results in the unbalance.  This patch
covers these cases by introducing a flag indicating the runtime PM
initialization and handling the codec registration procedure more
properly.  It also fixes the missing input beep device as a gratis,
too.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2015-03-03 17:22:12 +01:00
parent 0585244869
commit c4c2533f80
5 changed files with 26 additions and 10 deletions
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3
sound/hda/hdac_device.c
View File

@ -109,7 +109,6 @@ int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
return 0;
error:
pm_runtime_put_noidle(&codec->dev);
put_device(&codec->dev);
return err;
}
@ -121,7 +120,7 @@ EXPORT_SYMBOL_GPL(snd_hdac_device_init);
*/
void snd_hdac_device_exit(struct hdac_device *codec)
{
/* pm_runtime_put_noidle(&codec->dev); */
pm_runtime_put_noidle(&codec->dev);
snd_hdac_bus_remove_device(codec->bus, codec);
kfree(codec->vendor_name);
kfree(codec->chip_name);

1
sound/pci/hda/hda_bind.c
View File

@ -95,6 +95,7 @@ static int hda_codec_driver_probe(struct device *dev)
err = snd_card_register(codec->card);
if (err < 0)
goto error_module;
snd_hda_codec_register(codec);
}
return 0;

24
sound/pci/hda/hda_codec.c
View File

@ -912,6 +912,13 @@ static void codec_release_pcms(struct hda_codec *codec)
void snd_hda_codec_cleanup_for_unbind(struct hda_codec *codec)
{
if (codec->registered) {
/* pm_runtime_put() is called in snd_hdac_device_exit() */
pm_runtime_get_noresume(hda_codec_dev(codec));
pm_runtime_disable(hda_codec_dev(codec));
codec->registered = 0;
}
cancel_delayed_work_sync(&codec->jackpoll_work);
if (!codec->in_freeing)
snd_hda_ctls_clear(codec);
@ -943,15 +950,23 @@ void snd_hda_codec_cleanup_for_unbind(struct hda_codec *codec)
static unsigned int hda_set_power_state(struct hda_codec *codec,
unsigned int power_state);
static int snd_hda_codec_dev_register(struct snd_device *device)
/* also called from hda_bind.c */
void snd_hda_codec_register(struct hda_codec *codec)
{
struct hda_codec *codec = device->device_data;
if (codec->registered)
return;
if (device_is_registered(hda_codec_dev(codec))) {
snd_hda_register_beep_device(codec);
if (device_is_registered(hda_codec_dev(codec)))
pm_runtime_enable(hda_codec_dev(codec));
/* it was powered up in snd_hda_codec_new(), now all done */
snd_hda_power_down(codec);
codec->registered = 1;
}
}
static int snd_hda_codec_dev_register(struct snd_device *device)
{
snd_hda_codec_register(device->device_data);
return 0;
}
@ -1094,7 +1109,6 @@ int snd_hda_codec_new(struct hda_bus *bus, struct snd_card *card,
return 0;
error:
pm_runtime_put_noidle(hda_codec_dev(codec));
put_device(hda_codec_dev(codec));
return err;
}

1
sound/pci/hda/hda_codec.h
View File

@ -314,6 +314,7 @@ struct hda_codec {
/* misc flags */
unsigned int in_freeing:1; /* being released */
unsigned int registered:1; /* codec was registered */
unsigned int spdif_status_reset :1; /* needs to toggle SPDIF for each
* status change
* (e.g. Realtek codecs)

1
sound/pci/hda/hda_local.h
View File

@ -150,6 +150,7 @@ int __snd_hda_add_vmaster(struct hda_codec *codec, char *name,
#define snd_hda_add_vmaster(codec, name, tlv, slaves, suffix) \
__snd_hda_add_vmaster(codec, name, tlv, slaves, suffix, true, NULL)
int snd_hda_codec_reset(struct hda_codec *codec);
void snd_hda_codec_register(struct hda_codec *codec);
void snd_hda_codec_cleanup_for_unbind(struct hda_codec *codec);
enum {