diff options
Diffstat (limited to 'sound/usb/usbaudio.h')
| -rw-r--r-- | sound/usb/usbaudio.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h index 158ec053dc44..7521098ba391 100644 --- a/sound/usb/usbaudio.h +++ b/sound/usb/usbaudio.h @@ -139,6 +139,29 @@ struct snd_usb_audio_quirk { int snd_usb_lock_shutdown(struct snd_usb_audio *chip); void snd_usb_unlock_shutdown(struct snd_usb_audio *chip); +/* auto-cleanup */ +struct __snd_usb_lock { + struct snd_usb_audio *chip; + int err; +}; + +static inline struct __snd_usb_lock __snd_usb_lock_shutdown(struct snd_usb_audio *chip) +{ + struct __snd_usb_lock T = { .chip = chip }; + T.err = snd_usb_lock_shutdown(chip); + return T; +} + +static inline void __snd_usb_unlock_shutdown(struct __snd_usb_lock *lock) +{ + if (!lock->err) + snd_usb_unlock_shutdown(lock->chip); +} + +DEFINE_CLASS(snd_usb_lock, struct __snd_usb_lock, + __snd_usb_unlock_shutdown(&(_T)), __snd_usb_lock_shutdown(chip), + struct snd_usb_audio *chip) + extern bool snd_usb_use_vmalloc; extern bool snd_usb_skip_validation; |