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-rw-r--r--sound/usb/helper.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/usb/helper.h b/sound/usb/helper.h
index f5b4c6647e4d..e2b51ec96ec6 100644
--- a/sound/usb/helper.h
+++ b/sound/usb/helper.h
@@ -14,6 +14,9 @@ int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,
unsigned char snd_usb_parse_datainterval(struct snd_usb_audio *chip,
struct usb_host_interface *alts);
+struct usb_host_interface *
+snd_usb_get_host_interface(struct snd_usb_audio *chip, int ifnum, int altsetting);
+
/*
* retrieve usb_interface descriptor from the host interface
* (conditional for compatibility with the older API)