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ALSA: snd-usb: add snd_usb_audio-wide mutex

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This is needed for new card-wide list operations.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Daniel Mack 2012-04-12 13:51:10 +02:00 committed by Takashi Iwai
parent dd775ae254
commit 596580d0ee
2 changed files with 3 additions and 0 deletions
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2
sound/usb/card.c
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@ -276,6 +276,7 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
static int snd_usb_audio_free(struct snd_usb_audio *chip)
{
mutex_destroy(&chip->mutex);
kfree(chip);
return 0;
}
@ -336,6 +337,7 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx,
return -ENOMEM;
}
mutex_init(&chip->mutex);
mutex_init(&chip->shutdown_mutex);
chip->index = idx;
chip->dev = dev;

1
sound/usb/usbaudio.h
View File

@ -36,6 +36,7 @@ struct snd_usb_audio {
struct snd_card *card;
struct usb_interface *pm_intf;
u32 usb_id;
struct mutex mutex;
struct mutex shutdown_mutex;
unsigned int shutdown:1;
unsigned int probing:1;