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Diffstat (limited to 'sound/usb/card.c')
-rw-r--r--sound/usb/card.c109
1 files changed, 42 insertions, 67 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c
index f61ebb17cc64..1fab9778807a 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -112,15 +112,13 @@ static struct usb_driver usb_audio_driver;
/*
* disconnect streams
- * called from snd_usb_audio_disconnect()
+ * 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);
@@ -323,16 +321,6 @@ static int snd_usb_audio_dev_free(struct snd_device *device)
return snd_usb_audio_free(chip);
}
-static void remove_trailing_spaces(char *str)
-{
- char *p;
-
- if (!*str)
- return;
- for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--)
- *p = 0;
-}
-
/*
* create a chip instance and set its names.
*/
@@ -416,7 +404,7 @@ static int snd_usb_audio_create(struct usb_interface *intf,
USB_ID_PRODUCT(chip->usb_id));
}
}
- remove_trailing_spaces(card->shortname);
+ strim(card->shortname);
/* retrieve the vendor and device strings as longname */
if (quirk && quirk->vendor_name && *quirk->vendor_name) {
@@ -430,7 +418,7 @@ static int snd_usb_audio_create(struct usb_interface *intf,
/* we don't really care if there isn't any vendor string */
}
if (len > 0) {
- remove_trailing_spaces(card->longname);
+ strim(card->longname);
if (*card->longname)
strlcat(card->longname, " ", sizeof(card->longname));
}
@@ -475,14 +463,14 @@ static int snd_usb_audio_create(struct usb_interface *intf,
* only at the first time. the successive calls of this function will
* append the pcm interface to the corresponding card.
*/
-static struct snd_usb_audio *
-snd_usb_audio_probe(struct usb_device *dev,
- struct usb_interface *intf,
- const struct usb_device_id *usb_id)
+static int usb_audio_probe(struct usb_interface *intf,
+ const struct usb_device_id *usb_id)
{
- const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
- int i, err;
+ struct usb_device *dev = interface_to_usbdev(intf);
+ const struct snd_usb_audio_quirk *quirk =
+ (const struct snd_usb_audio_quirk *)usb_id->driver_info;
struct snd_usb_audio *chip;
+ int i, err;
struct usb_host_interface *alts;
int ifnum;
u32 id;
@@ -492,10 +480,11 @@ snd_usb_audio_probe(struct usb_device *dev,
id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
le16_to_cpu(dev->descriptor.idProduct));
if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
- goto __err_val;
+ return -ENXIO;
- if (snd_usb_apply_boot_quirk(dev, intf, quirk) < 0)
- goto __err_val;
+ err = snd_usb_apply_boot_quirk(dev, intf, quirk);
+ if (err < 0)
+ return err;
/*
* found a config. now register to ALSA
@@ -508,6 +497,7 @@ snd_usb_audio_probe(struct usb_device *dev,
if (usb_chip[i] && usb_chip[i]->dev == dev) {
if (usb_chip[i]->shutdown) {
dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
+ err = -EIO;
goto __error;
}
chip = usb_chip[i];
@@ -523,15 +513,16 @@ snd_usb_audio_probe(struct usb_device *dev,
if (enable[i] && ! usb_chip[i] &&
(vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
(pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
- if (snd_usb_audio_create(intf, dev, i, quirk,
- &chip) < 0) {
+ err = snd_usb_audio_create(intf, dev, i, quirk,
+ &chip);
+ if (err < 0)
goto __error;
- }
chip->pm_intf = intf;
break;
}
if (!chip) {
dev_err(&dev->dev, "no available usb audio device\n");
+ err = -ENODEV;
goto __error;
}
}
@@ -548,28 +539,32 @@ snd_usb_audio_probe(struct usb_device *dev,
err = 1; /* continue */
if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
/* need some special handlings */
- if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0)
+ err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
+ if (err < 0)
goto __error;
}
if (err > 0) {
/* create normal USB audio interfaces */
- if (snd_usb_create_streams(chip, ifnum) < 0 ||
- snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) {
+ err = snd_usb_create_streams(chip, ifnum);
+ if (err < 0)
+ goto __error;
+ err = snd_usb_create_mixer(chip, ifnum, ignore_ctl_error);
+ if (err < 0)
goto __error;
- }
}
/* we are allowed to call snd_card_register() many times */
- if (snd_card_register(chip->card) < 0) {
+ err = snd_card_register(chip->card);
+ if (err < 0)
goto __error;
- }
usb_chip[chip->index] = chip;
chip->num_interfaces++;
chip->probing = 0;
+ usb_set_intfdata(intf, chip);
mutex_unlock(&register_mutex);
- return chip;
+ return 0;
__error:
if (chip) {
@@ -578,17 +573,16 @@ snd_usb_audio_probe(struct usb_device *dev,
chip->probing = 0;
}
mutex_unlock(&register_mutex);
- __err_val:
- return NULL;
+ return err;
}
/*
* we need to take care of counter, since disconnection can be called also
* many times as well as usb_audio_probe().
*/
-static void snd_usb_audio_disconnect(struct usb_device *dev,
- struct snd_usb_audio *chip)
+static void usb_audio_disconnect(struct usb_interface *intf)
{
+ struct snd_usb_audio *chip = usb_get_intfdata(intf);
struct snd_card *card;
struct list_head *p;
bool was_shutdown;
@@ -604,12 +598,14 @@ static void snd_usb_audio_disconnect(struct usb_device *dev,
mutex_lock(&register_mutex);
if (!was_shutdown) {
+ 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) {
@@ -620,8 +616,8 @@ static void snd_usb_audio_disconnect(struct usb_device *dev,
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);
}
}
@@ -635,27 +631,6 @@ static void snd_usb_audio_disconnect(struct usb_device *dev,
}
}
-/*
- * new 2.5 USB kernel API
- */
-static int usb_audio_probe(struct usb_interface *intf,
- const struct usb_device_id *id)
-{
- struct snd_usb_audio *chip;
- chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
- if (chip) {
- usb_set_intfdata(intf, chip);
- return 0;
- } else
- return -EIO;
-}
-
-static void usb_audio_disconnect(struct usb_interface *intf)
-{
- snd_usb_audio_disconnect(interface_to_usbdev(intf),
- usb_get_intfdata(intf));
-}
-
#ifdef CONFIG_PM
int snd_usb_autoresume(struct snd_usb_audio *chip)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.