diff options
Diffstat (limited to 'sound/usb/card.c')
| -rw-r--r-- | sound/usb/card.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c index ccf95cfe186f..2da8ad75fd96 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -244,6 +244,21 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) usb_ifnum_to_if(dev, ctrlif)->intf_assoc; if (!assoc) { + /* + * Firmware writers cannot count to three. So to find + * the IAD on the NuForce UDH-100, also check the next + * interface. + */ + struct usb_interface *iface = + usb_ifnum_to_if(dev, ctrlif + 1); + if (iface && + iface->intf_assoc && + iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO && + iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2) + assoc = iface->intf_assoc; + } + + if (!assoc) { snd_printk(KERN_ERR "Audio class v2 interfaces need an interface association\n"); return -EINVAL; } @@ -646,7 +661,7 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) as->substream[0].need_setup_ep = as->substream[1].need_setup_ep = true; } - } + } } else { /* * otherwise we keep the rest of the system in the dark |