diff options
Diffstat (limited to 'sound/usb/usbaudio.c')
| -rw-r--r-- | sound/usb/usbaudio.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index c9476c237c4..53009bb642f 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -47,6 +47,7 @@ #include <linux/usb.h> #include <linux/vmalloc.h> #include <linux/moduleparam.h> +#include <linux/mutex.h> #include <sound/core.h> #include <sound/info.h> #include <sound/pcm.h> @@ -202,7 +203,7 @@ struct snd_usb_stream { * the all interfaces on the same card as one sound device. */ -static DECLARE_MUTEX(register_mutex); +static DEFINE_MUTEX(register_mutex); static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; @@ -3285,7 +3286,7 @@ static void *snd_usb_audio_probe(struct usb_device *dev, /* check whether it's already registered */ chip = NULL; - down(®ister_mutex); + mutex_lock(®ister_mutex); for (i = 0; i < SNDRV_CARDS; i++) { if (usb_chip[i] && usb_chip[i]->dev == dev) { if (usb_chip[i]->shutdown) { @@ -3338,13 +3339,13 @@ static void *snd_usb_audio_probe(struct usb_device *dev, usb_chip[chip->index] = chip; chip->num_interfaces++; - up(®ister_mutex); + mutex_unlock(®ister_mutex); return chip; __error: if (chip && !chip->num_interfaces) snd_card_free(chip->card); - up(®ister_mutex); + mutex_unlock(®ister_mutex); __err_val: return NULL; } @@ -3364,7 +3365,7 @@ static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr) chip = ptr; card = chip->card; - down(®ister_mutex); + mutex_lock(®ister_mutex); chip->shutdown = 1; chip->num_interfaces--; if (chip->num_interfaces <= 0) { @@ -3382,10 +3383,10 @@ static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr) snd_usb_mixer_disconnect(p); } usb_chip[chip->index] = NULL; - up(®ister_mutex); + mutex_unlock(®ister_mutex); snd_card_free(card); } else { - up(®ister_mutex); + mutex_unlock(®ister_mutex); } } |