[ALSA] usb-audio - move mixer data into separate struct

USB generic driver
Move all data related to audio control interfaces into a separate struct
local to usbmixer.c.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index 14f7cf7e363c..41d842dab3e8 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -136,7 +136,7 @@ struct snd_usb_audio {
         struct list_head midi_list;     /* list of midi interfaces */
         int next_midi_device;
 
-        unsigned int ignore_ctl_error;  /* for mixer */
+        struct list_head mixer_list;    /* list of mixer interfaces */
 };
 
 /*
@@ -219,6 +219,7 @@ void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsub
 int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request, __u8 requesttype, __u16 value, __u16 index, void *data, __u16 size, int timeout);
 
 int snd_usb_create_mixer(snd_usb_audio_t *chip, int ctrlif);
+void snd_usb_mixer_disconnect(struct list_head *p);
 
 int snd_usb_create_midi_interface(snd_usb_audio_t *chip, struct usb_interface *iface, const snd_usb_audio_quirk_t *quirk);
 void snd_usbmidi_input_stop(struct list_head* p);