ALSA: usb-audio: Pass direct struct pointer instead of list_head
Some functions in mixer.c and endpoint.c receive list_head instead of
the object itself. This is not obvious and rather error-prone. Let's
pass the proper object directly instead.
The functions in midi.c still receive list_head and this can't be
changed since the object definition isn't exposed to the outside of
midi.c, so left as is.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 63a8adb..e4aaa21 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -2483,11 +2483,8 @@
return err;
}
-void snd_usb_mixer_disconnect(struct list_head *p)
+void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer)
{
- struct usb_mixer_interface *mixer;
-
- mixer = list_entry(p, struct usb_mixer_interface, list);
usb_kill_urb(mixer->urb);
usb_kill_urb(mixer->rc_urb);
}