diff options
Diffstat (limited to 'sound/usb/card.c')
| -rw-r--r-- | sound/usb/card.c | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c index 359f7a04be1c..162bdd6eb4d4 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -634,7 +634,6 @@ static int usb_audio_probe(struct usb_interface *intf, id, &chip); if (err < 0) goto __error; - chip->pm_intf = intf; break; } else if (vid[i] != -1 || pid[i] != -1) { dev_info(&dev->dev, @@ -651,6 +650,13 @@ static int usb_audio_probe(struct usb_interface *intf, goto __error; } } + + if (chip->num_interfaces >= MAX_CARD_INTERFACES) { + dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n"); + err = -EINVAL; + goto __error; + } + dev_set_drvdata(&dev->dev, chip); /* @@ -703,6 +709,7 @@ static int usb_audio_probe(struct usb_interface *intf, } usb_chip[chip->index] = chip; + chip->intf[chip->num_interfaces] = intf; chip->num_interfaces++; usb_set_intfdata(intf, chip); atomic_dec(&chip->active); @@ -818,19 +825,37 @@ void snd_usb_unlock_shutdown(struct snd_usb_audio *chip) int snd_usb_autoresume(struct snd_usb_audio *chip) { + int i, err; + if (atomic_read(&chip->shutdown)) return -EIO; - if (atomic_inc_return(&chip->active) == 1) - return usb_autopm_get_interface(chip->pm_intf); + if (atomic_inc_return(&chip->active) != 1) + return 0; + + for (i = 0; i < chip->num_interfaces; i++) { + err = usb_autopm_get_interface(chip->intf[i]); + if (err < 0) { + /* rollback */ + while (--i >= 0) + usb_autopm_put_interface(chip->intf[i]); + atomic_dec(&chip->active); + return err; + } + } return 0; } void snd_usb_autosuspend(struct snd_usb_audio *chip) { + int i; + if (atomic_read(&chip->shutdown)) return; - if (atomic_dec_and_test(&chip->active)) - usb_autopm_put_interface(chip->pm_intf); + if (!atomic_dec_and_test(&chip->active)) + return; + + for (i = 0; i < chip->num_interfaces; i++) + usb_autopm_put_interface(chip->intf[i]); } static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) |