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>

1 files changed, 2 insertions, 5 deletions

diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 114e3e7ff511..167d0c1643e1 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -1002,15 +1002,12 @@ void snd_usb_endpoint_release(struct snd_usb_endpoint *ep)
 /**
  * snd_usb_endpoint_free: Free the resources of an snd_usb_endpoint
  *
- * @ep: the list header of the endpoint to free
+ * @ep: the endpoint to free
  *
  * This free all resources of the given ep.
  */
-void snd_usb_endpoint_free(struct list_head *head)
+void snd_usb_endpoint_free(struct snd_usb_endpoint *ep)
 {
-        struct snd_usb_endpoint *ep;
-
-        ep = list_entry(head, struct snd_usb_endpoint, list);
         kfree(ep);
 }