diff options
author | Al Viro <viro@zeniv.linux.org.uk> | 2012-11-16 22:27:58 -0500 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-11-16 22:27:58 -0500 |
commit | d05f06e60df4f56a70fb8a3e46335b40687169e9 (patch) | |
tree | c1eec6749fed86a21b08606e1e4acefe4b033253 /sound/usb/card.c | |
parent | 0af1c5300db31f25a412e6e83d42b1747d56c9de (diff) | |
parent | 1d72d9f83df057e71c7951def41138a0230bf737 (diff) | |
download | linux-d05f06e60df4f56a70fb8a3e46335b40687169e9.tar.bz2 |
Merge branch 'arch-frv' into no-rebases
Diffstat (limited to 'sound/usb/card.c')
-rw-r--r-- | sound/usb/card.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c index 561bb74fd364..282f0fc9fed1 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -339,7 +339,7 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx, } mutex_init(&chip->mutex); - mutex_init(&chip->shutdown_mutex); + init_rwsem(&chip->shutdown_rwsem); chip->index = idx; chip->dev = dev; chip->card = card; @@ -560,7 +560,7 @@ static void snd_usb_audio_disconnect(struct usb_device *dev, card = chip->card; mutex_lock(®ister_mutex); - mutex_lock(&chip->shutdown_mutex); + down_write(&chip->shutdown_rwsem); chip->shutdown = 1; chip->num_interfaces--; if (chip->num_interfaces <= 0) { @@ -582,11 +582,11 @@ static void snd_usb_audio_disconnect(struct usb_device *dev, snd_usb_mixer_disconnect(p); } usb_chip[chip->index] = NULL; - mutex_unlock(&chip->shutdown_mutex); + up_write(&chip->shutdown_rwsem); mutex_unlock(®ister_mutex); snd_card_free_when_closed(card); } else { - mutex_unlock(&chip->shutdown_mutex); + up_write(&chip->shutdown_rwsem); mutex_unlock(®ister_mutex); } } @@ -618,16 +618,20 @@ int snd_usb_autoresume(struct snd_usb_audio *chip) { int err = -ENODEV; + down_read(&chip->shutdown_rwsem); if (!chip->shutdown && !chip->probing) err = usb_autopm_get_interface(chip->pm_intf); + up_read(&chip->shutdown_rwsem); return err; } void snd_usb_autosuspend(struct snd_usb_audio *chip) { + down_read(&chip->shutdown_rwsem); if (!chip->shutdown && !chip->probing) usb_autopm_put_interface(chip->pm_intf); + up_read(&chip->shutdown_rwsem); } static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) |