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authorTakashi Iwai <tiwai@suse.de>2014-10-31 11:24:32 +0100
committerTakashi Iwai <tiwai@suse.de>2014-11-04 15:09:10 +0100
commita6cece9d81990e729c1f9da2a5bff2d29f7df649 (patch)
tree46746842e5039a1ce4e01e1e9de58ccb46f234de /sound/usb
parent4c8c3a4fcc021677c9a363b4e77f61dd09dbfd1a (diff)
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>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/card.c20
-rw-r--r--sound/usb/endpoint.c7
-rw-r--r--sound/usb/endpoint.h2
-rw-r--r--sound/usb/mixer.c5
-rw-r--r--sound/usb/mixer.h2
5 files changed, 15 insertions, 21 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c
index be16bdc53c2a..fa6c0972aa23 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -114,13 +114,11 @@ static struct usb_driver usb_audio_driver;
* disconnect streams
* called from usb_audio_disconnect()
*/
-static void snd_usb_stream_disconnect(struct list_head *head)
+static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
{
int idx;
- struct snd_usb_stream *as;
struct snd_usb_substream *subs;
- as = list_entry(head, struct snd_usb_stream, list);
for (idx = 0; idx < 2; idx++) {
subs = &as->substream[idx];
if (!subs->num_formats)
@@ -307,10 +305,10 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
static int snd_usb_audio_free(struct snd_usb_audio *chip)
{
- struct list_head *p, *n;
+ struct snd_usb_endpoint *ep, *n;
- list_for_each_safe(p, n, &chip->ep_list)
- snd_usb_endpoint_free(p);
+ list_for_each_entry_safe(ep, n, &chip->ep_list, list)
+ snd_usb_endpoint_free(ep);
mutex_destroy(&chip->mutex);
kfree(chip);
@@ -609,12 +607,14 @@ static void usb_audio_disconnect(struct usb_interface *intf)
mutex_lock(&register_mutex);
chip->num_interfaces--;
if (chip->num_interfaces <= 0) {
+ struct snd_usb_stream *as;
struct snd_usb_endpoint *ep;
+ struct usb_mixer_interface *mixer;
snd_card_disconnect(card);
/* release the pcm resources */
- list_for_each(p, &chip->pcm_list) {
- snd_usb_stream_disconnect(p);
+ list_for_each_entry(as, &chip->pcm_list, list) {
+ snd_usb_stream_disconnect(as);
}
/* release the endpoint resources */
list_for_each_entry(ep, &chip->ep_list, list) {
@@ -625,8 +625,8 @@ static void usb_audio_disconnect(struct usb_interface *intf)
snd_usbmidi_disconnect(p);
}
/* release mixer resources */
- list_for_each(p, &chip->mixer_list) {
- snd_usb_mixer_disconnect(p);
+ list_for_each_entry(mixer, &chip->mixer_list, list) {
+ snd_usb_mixer_disconnect(mixer);
}
usb_chip[chip->index] = NULL;
mutex_unlock(&register_mutex);
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);
}
diff --git a/sound/usb/endpoint.h b/sound/usb/endpoint.h
index e61ee5c356a3..6428392d8f62 100644
--- a/sound/usb/endpoint.h
+++ b/sound/usb/endpoint.h
@@ -24,7 +24,7 @@ void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep);
int snd_usb_endpoint_activate(struct snd_usb_endpoint *ep);
void snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep);
void snd_usb_endpoint_release(struct snd_usb_endpoint *ep);
-void snd_usb_endpoint_free(struct list_head *head);
+void snd_usb_endpoint_free(struct snd_usb_endpoint *ep);
int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep);
int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep);
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 63a8adb1705e..e4aaa21baed2 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -2483,11 +2483,8 @@ _error:
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);
}
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index 73b1f649447b..2c7b9c9c2aa6 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -57,7 +57,7 @@ struct usb_mixer_elem_info {
int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
int ignore_error);
-void snd_usb_mixer_disconnect(struct list_head *p);
+void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);